{"id":16397,"date":"2024-09-19T10:29:21","date_gmt":"2024-09-19T08:29:21","guid":{"rendered":"https:\/\/dev.shimadzu-testing.com\/?p=16397"},"modified":"2025-02-05T11:22:14","modified_gmt":"2025-02-05T10:22:14","slug":"development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests","status":"publish","type":"post","link":"https:\/\/shimadzu-testing.com\/cz\/know-how\/high-speed-video-camera\/development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests\/","title":{"rendered":"V\u00fdvoj komplexn\u00edho p\u0159\u00edstupu k m\u011b\u0159en\u00ed s\u00edly a deformace p\u0159i vysokorychlostn\u00edch tahov\u00fdch zkou\u0161k\u00e1ch"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"16397\" class=\"elementor elementor-16397\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4e15197 e-flex e-con-boxed e-con e-parent\" data-id=\"4e15197\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a8c5eeb elementor-widget elementor-widget-text-editor\" data-id=\"a8c5eeb\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2><strong>U\u017eivatel<\/strong> <strong>V\u00fdhody<\/strong><\/h2><ul><li>Srovn\u00e1n\u00ed a z\u00e1vislost integrovan\u00e9ho syst\u00e9mu HITS-T10 a dal\u0161\u00edch technik pro m\u011b\u0159en\u00ed zku\u0161ebn\u00edch sil a nap\u011bt\u00ed, posun\u016f a deformac\u00ed.<\/li><li>Inovativn\u00ed m\u011b\u0159en\u00ed pomoc\u00ed kamery HPV-X2 a DIC anal\u00fdzy, pomoc\u00ed kter\u00e9 lze vypo\u010d\u00edtat skute\u010dn\u00e9 zku\u0161ebn\u00ed nap\u011bt\u00ed a deformace.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c757c28 elementor-widget elementor-widget-text-editor\" data-id=\"c757c28\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2><strong>\u00davod<\/strong><\/h2>\nV automobilov\u00e9m a leteck\u00e9m pr\u016fmyslu se \u010dasto vyskytuj\u00ed n\u00e1razov\u00e1 zat\u00ed\u017een\u00ed s vysok\u00fdmi rychlostmi deformace, tak\u017ee pro zaji\u0161t\u011bn\u00ed bezpe\u010dnostn\u00edch vlastnost\u00ed vysoce zat\u00ed\u017een\u00fdch komponent\u016f je nutn\u00e1 charakterizace materi\u00e1lu na dynamick\u00e9m z\u00e1klad\u011b. V\u011bt\u0161ina vn\u011bj\u0161\u00edch d\u00edl\u016f je dnes vyrobena z polymer\u016f vyztu\u017een\u00fdch vl\u00e1kny (FRP), kter\u00e9 vykazuj\u00ed vlastnosti z\u00e1visl\u00e9 na rychlosti deformace [1-3]. Pro tento \u00fa\u010del je b\u011b\u017enou metodou stanoven\u00ed charakteristick\u00fdch parametr\u016f p\u0159i vysokorychlostn\u00edch tahov\u00fdch zkou\u0161k\u00e1ch. Proto\u017ee FRP vykazuj\u00ed s vy\u0161\u0161\u00edmi rychlostmi deformace rostouc\u00ed mez pevnosti v tahu (\u03c3UTS), je vysok\u00fd potenci\u00e1l, pokud jde o rychlosti deformace.\n\u00faspory materi\u00e1lu a lehk\u00e9 konstrukce. V d\u016fsledku toho je nutn\u00e9 komplexn\u00ed pochopen\u00ed \u00fadaj\u016f, kter\u00e9 se m\u011b\u0159\u00ed p\u0159i vysokorychlostn\u00edch tahov\u00fdch zkou\u0161k\u00e1ch. Zku\u0161ebn\u00ed s\u00edlu obvykle zaji\u0161\u0165uje piezoelektrick\u00fd sn\u00edma\u010d zat\u00ed\u017een\u00ed, zat\u00edmco pohyb p\u00edstu zaznamen\u00e1v\u00e1 kapacitn\u00ed sn\u00edma\u010d. Takto je tak\u00e9 realizov\u00e1n vysokorychlostn\u00ed r\u00e1zov\u00fd zku\u0161ebn\u00ed stroj HITS-TX, obr\u00e1zek 1. HITS-TX nav\u00edc poskytuje p\u0159\u00eddavn\u00fd sn\u00edma\u010d posunut\u00ed rukojeti (GDS) pro m\u011b\u0159en\u00ed pohybu vzorku t\u011bsn\u011b uvnit\u0159 rukojeti, a tud\u00ed\u017e vylu\u010duje vlivy dal\u0161\u00edch \u010d\u00e1st\u00ed v soustav\u011b zat\u00ed\u017een\u00ed. To je v souladu s dosavadn\u00edmi poznatky o oscilac\u00edch a nap\u011b\u0165ov\u00fdch vln\u00e1ch v zat\u011b\u017eovac\u00ed soustav\u011b, kter\u00e9 ovliv\u0148uj\u00ed zaznamenan\u00e9 sign\u00e1ly s\u00edly a posunut\u00ed. [4,5]\nObecn\u00fdm probl\u00e9mem vysokorychlostn\u00edho zkou\u0161en\u00ed materi\u00e1l\u016f je n\u00e1raz, kter\u00fd se vyskytuje mezi p\u0159ibli\u017eovac\u00edm p\u0159\u00edpravkem a p\u00edstem aktu\u00e1toru na za\u010d\u00e1tku zkou\u0161ky. Ve vysokorychlostn\u00edch syst\u00e9mech se obvykle pou\u017e\u00edv\u00e1 p\u0159ibli\u017eovac\u00ed za\u0159\u00edzen\u00ed, aby se p\u00edst urychlil na po\u017eadovanou zku\u0161ebn\u00ed s.peed, ne\u017e se vzorek zat\u00ed\u017e\u00ed. V d\u016fsledku n\u00e1razu uvnit\u0159 tohoto za\u0159\u00edzen\u00ed se na zat\u011b\u017eovac\u00ed soustavu p\u0159en\u00e1\u0161ej\u00ed oscilace, kter\u00e9 se \u0161\u00ed\u0159\u00ed jako vlny pru\u017en\u00e9ho nap\u011bt\u00ed. Tyto vlny se odr\u00e1\u017eej\u00ed v silom\u011bru ve spodn\u00ed \u010d\u00e1sti zku\u0161ebn\u00edho syst\u00e9mu a v d\u016fsledku toho ovliv\u0148uj\u00ed m\u011b\u0159en\u00ed s\u00edly a posunut\u00ed. Aby se t\u011bmto oscilac\u00edm zabr\u00e1nilo nebo aby se alespo\u0148 omezily, je nezbytn\u00e9 instalovat mechanismus pro tlumen\u00ed p\u016fsoben\u00ed s\u00edly. K tomuto \u00fa\u010delu lze pou\u017e\u00edt r\u016fzn\u00e9 materi\u00e1ly nebo geometrie kontaktn\u00edch ploch a instalovat tlumic\u00ed prvky. \u00da\u010dinek tlumen\u00ed by v\u0161ak ji\u017e nem\u011bl m\u00edt vliv na m\u011b\u0159en\u00ed p\u0159i zat\u00ed\u017een\u00ed 25% meze kluzu [5].\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6728194 elementor-widget elementor-widget-text-editor\" data-id=\"6728194\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2><strong>Materi\u00e1ly a metody\n<\/strong><\/h2>\nPro zkoum\u00e1n\u00ed se pou\u017e\u00edv\u00e1 kompozitn\u00ed materi\u00e1l z epoxidu vyztu\u017een\u00e9ho sklen\u011bn\u00fdmi vl\u00e1kny (GFR-EP), kter\u00fd dob\u0159e reprezentuje v\u00fd\u0161e uvedenou skupinu materi\u00e1l\u016f. Materi\u00e1l je vyztu\u017een obousm\u011brn\u00fdmi sklen\u011bn\u00fdmi vl\u00e1kny v orientaci 0\/90\u00b0. Na z\u00e1klad\u011b n\u011bkolika studi\u00ed se o\u010dek\u00e1v\u00e1 pozitivn\u00ed z\u00e1vislost na rychlosti deformace [1-3]. Geometrie vzorku, obr. 2, je dal\u0161\u00edm v\u00fdvojem geometrie vzorku a byla speci\u00e1ln\u011b upravena pro m\u011b\u0159en\u00ed vysokorychlostn\u00ed videokamerou. Podrobn\u011bji vzorek poskytuje dal\u0161\u00ed dynamometrickou \u010d\u00e1st, kter\u00e1 umo\u017e\u0148uje v\u00fdpo\u010det s\u00edly pomoc\u00ed digit\u00e1ln\u00ed obrazov\u00e9 korelace (DIC).\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c40aa19 e-grid e-con-full e-con e-child\" data-id=\"c40aa19\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c3a6419 elementor-widget elementor-widget-image\" data-id=\"c3a6419\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests-fig2-specimen-geometry.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests-fig2-specimen-geometry\" data-elementor-lightbox-description=\"Figure 2: Specimen geometry\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTYzMzYsInVybCI6Imh0dHBzOlwvXC9zaGltYWR6dS10ZXN0aW5nLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNFwvMDlcL2RldmVsb3BtZW50LW9mLWEtaG9saXN0aWMtYXBwcm9hY2gtZm9yLWZvcmNlLWFuZC1zdHJhaW4tbWVhc3VyZW1lbnRzLWluLWhpZ2gtc3BlZWQtdGVuc2lsZS10ZXN0cy1maWcyLXNwZWNpbWVuLWdlb21ldHJ5LmpwZyJ9\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"768\" height=\"313\" src=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests-fig2-specimen-geometry-768x313.jpg\" class=\"attachment-medium_large size-medium_large wp-image-16336\" alt=\"Obr\u00e1zek 2: Geometrie vzorku\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Obr\u00e1zek 2: Geometrie vzorku<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cb0bc9a elementor-widget elementor-widget-image\" data-id=\"cb0bc9a\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests-fig3-test-setup-with-hpv-x2-camera.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests-fig3-test-setup-with-hpv-x2-camera\" data-elementor-lightbox-description=\"Figure 3: Test setup with HPV-X2 camera\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTYzMzcsInVybCI6Imh0dHBzOlwvXC9zaGltYWR6dS10ZXN0aW5nLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNFwvMDlcL2RldmVsb3BtZW50LW9mLWEtaG9saXN0aWMtYXBwcm9hY2gtZm9yLWZvcmNlLWFuZC1zdHJhaW4tbWVhc3VyZW1lbnRzLWluLWhpZ2gtc3BlZWQtdGVuc2lsZS10ZXN0cy1maWczLXRlc3Qtc2V0dXAtd2l0aC1ocHYteDItY2FtZXJhLmpwZyJ9\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"768\" height=\"400\" src=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests-fig3-test-setup-with-hpv-x2-camera-768x400.jpg\" class=\"attachment-medium_large size-medium_large wp-image-16337\" alt=\"Obr\u00e1zek 3: Testovac\u00ed sestava s kamerou HPV-X2\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Obr\u00e1zek 3: Testovac\u00ed sestava s kamerou HPV-X2<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3af3232 elementor-widget elementor-widget-text-editor\" data-id=\"3af3232\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tZku\u0161ebn\u00ed sestava (Obr\u00e1zek 3) se skl\u00e1d\u00e1 ze syst\u00e9mu HITS-TX se sn\u00edma\u010dem zdvihu p\u00edstu, kter\u00fd je p\u0159ipojen k \u0159\u00eddic\u00ed jednotce typu 4870, spolu s dal\u0161\u00edm sn\u00edma\u010dem posunu sev\u0159en\u00ed (GDS) a vysokorychlostn\u00ed videokamerou hyper vision (HPV-X2, Obr\u00e1zek 4). Syst\u00e9m HITS-TX nav\u00edc poskytuje r\u016fzn\u00e9 n\u00e1jezdov\u00e9 p\u0159\u00edpravky, aby bylo mo\u017en\u00e9 optim\u00e1ln\u011b p\u0159izp\u016fsobit geometrii a tlumic\u00ed \u00fa\u010dinky zvolen\u00e9 zku\u0161ebn\u00ed rychlosti. Na jedn\u00e9 stran\u011b je k dispozici ku\u017eelov\u00e1 verze se dv\u011bma d\u00e9lkami. Na druh\u00e9 stran\u011b lze pou\u017e\u00edt plochou verzi n\u00e1jezdov\u00e9ho p\u0159\u00edpravku. Zat\u00edmco ploch\u00e1 verze je vybavena pry\u017e\u00ed tlum\u00edc\u00ed n\u00e1razy, ku\u017eelov\u00e9 verze vyu\u017e\u00edvaj\u00ed k tlumen\u00ed zku\u0161ebn\u00edch sil sty\u010dnou plochu a tak\u00e9 kombinaci dvou pry\u017eov\u00fdch krou\u017ek\u016f, kter\u00e9 zabra\u0148uj\u00ed v\u00edcen\u00e1sobn\u00fdm koliz\u00edm. Souhrnn\u011b lze \u0159\u00edci, \u017ee ploch\u00e1 verze by se m\u011bla pou\u017e\u00edvat do rychlosti 8 m\/s, zat\u00edmco ku\u017eelov\u00e1 verze se pak pou\u017e\u00edv\u00e1 do rychlosti 20 m\/s (72 km\/h). V t\u00e9to pr\u00e1ci jsou provedeny vysokorychlostn\u00ed tahov\u00e9 zkou\u0161ky p\u0159i rychlostech 5, 6,5, 8 a 12 m\/s v kombinaci s plochou a ku\u017eelovou verz\u00ed p\u0159ibli\u017eovac\u00edho p\u0159\u00edpravku. Podle [6] tyto rychlosti odpov\u00eddaj\u00ed jmenovit\u00fdm deforma\u010dn\u00edm rychlostem 920, 1 200, 1 480 a 2 220 s-1. Pro dosa\u017een\u00ed nejvy\u0161\u0161\u00edch rychlost\u00ed z\u00e1znamu s kamerou HPV-X2 je zapot\u0159eb\u00ed co nejkrat\u0161\u00ed doba expozice. V d\u016fsledku toho jsou instalov\u00e1ny t\u0159i sv\u011bteln\u00e9 zdroje, jedna vysoce v\u00fdkonn\u00e1 LED se sv\u011bteln\u00fdm tokem 15 000 lumen\u016f t\u011bsn\u011b pod objektivem a dv\u011b HMI-sv\u011btla, ka\u017ed\u00e9 o v\u00fdkonu 400 W, um\u00edst\u011bn\u00e1 po obou stran\u00e1ch. Dal\u0161\u00ed v\u00fdzvou, kter\u00e1 se poj\u00ed s vysokorychlostn\u00edm zobrazov\u00e1n\u00edm, je spou\u0161t\u011bn\u00ed fotoapar\u00e1tu [7]. Pro tento \u00fa\u010del poskytuje \u0159\u00eddic\u00ed jednotka syst\u00e9mu HITS-TX typu 4870 TTL.\n5 V sign\u00e1l, zat\u00edmco \u010dasov\u00e1n\u00ed je \u0159\u00edzeno pomoc\u00ed zdvihu p\u00edstu. Pomoc\u00ed synchroniza\u010dn\u00edho sign\u00e1lu z kamery HPV-X2 do syst\u00e9mu HITS-TX bylo mo\u017en\u00e9 dos\u00e1hnout repro- dukovateln\u00fdch v\u00fdsledk\u016f.\nVzhledem k tomu, \u017ee kamera HPV-X2 m\u00e1 omezenou kruhovou vyrovn\u00e1vac\u00ed pam\u011b\u0165, je po\u010det sn\u00edmk\u016f zaznamenan\u00fdch v pln\u00e9m rozli\u0161en\u00ed omezen na 128. P\u0159i pou\u017eit\u00ed speci\u00e1ln\u00ed interpolace je v\u0161ak mo\u017en\u00e9 nastavit po\u010det sn\u00edmk\u016f na 256, co\u017e vede k men\u0161\u00edmu celkov\u00e9mu rozli\u0161en\u00ed. Proto je nutn\u00e9 zn\u00e1t p\u0159esnou dobu testu a podle toho nastavit rychlost z\u00e1znamu. V tomto p\u0159\u00edpad\u011b se zji\u0161t\u011bn\u00e9 \u010dasy testu pohybuj\u00ed mezi 100 a 200 \u03bcs v z\u00e1vislosti na rychlosti testu. Testovac\u00ed \u010dasy 200 \u03bcs odpov\u00eddaj\u00ed maxim\u00e1ln\u00ed teoretick\u00e9 rychlosti z\u00e1znamu 640 000 sn\u00edmk\u016f za sekundu (fps) za p\u0159edpokladu, \u017ee je dokonale nastaven spou\u0161t\u011bc\u00ed bod v \u010dase. Pro kompenzaci odchylek v \u010dasov\u00e1n\u00ed je skute\u010dn\u00e1 rychlost z\u00e1znamu nastavena na 250 000 fps.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2e696ce e-grid e-con-full e-con e-child\" data-id=\"2e696ce\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-919aaaa elementor-widget elementor-widget-image\" data-id=\"919aaaa\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests-fig4-high-speed-video-camera-hpv-x2.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests-fig4-high-speed-video-camera-hpv-x2\" data-elementor-lightbox-description=\"Figure 4: High-speed video camera HPV-X2\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTYzMzgsInVybCI6Imh0dHBzOlwvXC9zaGltYWR6dS10ZXN0aW5nLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNFwvMDlcL2RldmVsb3BtZW50LW9mLWEtaG9saXN0aWMtYXBwcm9hY2gtZm9yLWZvcmNlLWFuZC1zdHJhaW4tbWVhc3VyZW1lbnRzLWluLWhpZ2gtc3BlZWQtdGVuc2lsZS10ZXN0cy1maWc0LWhpZ2gtc3BlZWQtdmlkZW8tY2FtZXJhLWhwdi14Mi5qcGcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"768\" height=\"576\" src=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests-fig4-high-speed-video-camera-hpv-x2-768x576.jpg\" class=\"attachment-medium_large size-medium_large wp-image-16338\" alt=\"Obr\u00e1zek 4: Vysokorychlostn\u00ed videokamera HPV-X2\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Obr\u00e1zek 4: Vysokorychlostn\u00ed videokamera HPV-X2<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-21447e8 elementor-widget elementor-widget-image\" data-id=\"21447e8\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests-fig5-test-forces-measured-by-cell-and-dic.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests-fig5-test-forces-measured-by-cell-and-dic\" data-elementor-lightbox-description=\"Figure 5: Test forces measured by load cell and DIC\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTYzMzksInVybCI6Imh0dHBzOlwvXC9zaGltYWR6dS10ZXN0aW5nLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNFwvMDlcL2RldmVsb3BtZW50LW9mLWEtaG9saXN0aWMtYXBwcm9hY2gtZm9yLWZvcmNlLWFuZC1zdHJhaW4tbWVhc3VyZW1lbnRzLWluLWhpZ2gtc3BlZWQtdGVuc2lsZS10ZXN0cy1maWc1LXRlc3QtZm9yY2VzLW1lYXN1cmVkLWJ5LWNlbGwtYW5kLWRpYy5qcGcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"561\" src=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests-fig5-test-forces-measured-by-cell-and-dic-768x561.jpg\" class=\"attachment-medium_large size-medium_large wp-image-16339\" alt=\"Obr\u00e1zek 5: Zku\u0161ebn\u00ed s\u00edly m\u011b\u0159en\u00e9 silom\u011brem a DIC\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Obr\u00e1zek 5: Zku\u0161ebn\u00ed s\u00edly m\u011b\u0159en\u00e9 silom\u011brem a DIC<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8f5d236 elementor-widget elementor-widget-spacer\" data-id=\"8f5d236\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f3066e4 elementor-widget elementor-widget-text-editor\" data-id=\"f3066e4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2><strong>V\u00fdsledky a diskuse<br \/><\/strong><\/h2><p>Pro stanoven\u00ed vlastnost\u00ed materi\u00e1lu p\u0159i vysokorychlostn\u00edch zkou\u0161k\u00e1ch obecn\u011b lze pou\u017e\u00edt r\u016fzn\u00e9 techniky m\u011b\u0159en\u00ed deformace, jako jsou tenzometry, optick\u00e9 extenzometry, laserov\u00e9 syst\u00e9my nebo vysokorychlostn\u00ed kamery [6]. Dodate\u010dnou DIC-anal\u00fdzou vysokorychlostn\u00edch sn\u00edmk\u016f je mo\u017en\u00e9 vizualizovat rozlo\u017een\u00ed deformace na cel\u00e9m vzorku. Tot\u00e9\u017e plat\u00ed pro m\u011b\u0159en\u00ed s\u00edly, kter\u00e9 lze prov\u00e1d\u011bt bu\u010f pomoc\u00ed syst\u00e9mov\u011b integrovan\u00fdch sn\u00edma\u010d\u016f zat\u00ed\u017een\u00ed, nebo bez setrva\u010dnosti.<\/p><h3>a.   M\u011b\u0159en\u00ed s\u00edly<\/h3><p>Pro posouzen\u00ed kvality m\u011b\u0159en\u00ed s\u00edly pomoc\u00ed silom\u011bru se prov\u00e1d\u00ed srovn\u00e1n\u00ed se silami vypo\u010dten\u00fdmi pomoc\u00ed anal\u00fdzy DIC a kamery HPV-X2. P\u0159esn\u00e9 m\u011b\u0159en\u00ed se st\u00e1v\u00e1 dostupn\u00fdm p\u0159i n\u00e1vrhu dynamometrick\u00e9 \u010d\u00e1sti vzorku. Proto se pro tato zkoum\u00e1n\u00ed pou\u017e\u00edv\u00e1 m\u00edrn\u011b asymetrick\u00fd vzorek (<strong>Obr\u00e1zek 5<\/strong>). Tato geometrie umo\u017e\u0148uje m\u011b\u0159en\u00ed deformace v m\u011b\u0159ic\u00ed \u010d\u00e1sti a m\u011b\u0159en\u00ed s\u00edly v dynamometrick\u00e9 \u010d\u00e1sti s anal\u00fdzou DIC sou\u010dasn\u011b.<\/p><p>Obvykle je dynamometrick\u00e1 \u010d\u00e1st oblast\u00ed, kde nedoch\u00e1z\u00ed k plastick\u00e9 deformaci. U FRP se rozum\u00ed \u00fasek, kde je povoleno stanoven\u00ed Youngova modulu. Jeliko\u017e je stanoven\u00ed Youngova modulu povoleno v mez\u00edch 0,05 a\u017e 0,25% [8], zav\u00e1d\u00ed se prom\u011bnn\u00fd modul v z\u00e1vislosti na celkov\u00e9 deformaci, co\u017e je vhodn\u00e9 pro viskoelastick\u00e9 chov\u00e1n\u00ed materi\u00e1lu GFR-EP. S\u00edlu, kter\u00e1 skute\u010dn\u011b p\u016fsob\u00ed na vzorek, lze tedy ur\u010dit pomoc\u00ed \u03c3 = E\ua78f\u03b5 (Hook\u016fv z\u00e1kon) \uf0e0 F = E\ua78f\u03b5\ua78fA. Young\u016fv modul v\u0161ak mus\u00ed b\u00fdt stanoven na dynamick\u00e9m z\u00e1klad\u011b, proto\u017ee kvazistatick\u00e9 vlastnosti materi\u00e1lu nelze p\u0159en\u00e9st do vysokorychlostn\u00edho zkou\u0161en\u00ed. Jedinou mo\u017enost\u00ed, jak ur\u010dit spr\u00e1vn\u00fd Young\u016fv modul, je tedy v\u00fdpo\u010det v kr\u00e1tk\u00e9m \u010dasov\u00e9m \u00faseku mezi n\u00e1razem na p\u0159ibli\u017eovac\u00ed p\u0159\u00edpravek a vlnami pru\u017en\u00e9ho nap\u011bt\u00ed, kter\u00e9 se \u0161\u00ed\u0159\u00ed a\u017e k zat\u011b\u017eovac\u00edmu \u010dl\u00e1nku ve spodn\u00ed \u010d\u00e1sti zku\u0161ebn\u00edho syst\u00e9mu. Krom\u011b toho je d\u016fle\u017eit\u00e9 zpr\u016fm\u011brovat nam\u011b\u0159enou deformaci v dynamometrick\u00e9m \u0159ezu na stejn\u00e9 \u0161\u00ed\u0159ce vzorku, ke kter\u00e9 se vztahuje pr\u016f\u0159ez A.<\/p><p><strong>Obr\u00e1zek 5 <\/strong>ukazuje porovn\u00e1n\u00ed zku\u0161ebn\u00edch sil m\u011b\u0159en\u00fdch silom\u011brem v porovn\u00e1n\u00ed s DIC p\u0159i pou\u017eit\u00ed ku\u017eelov\u00e9ho n\u00e1jezdov\u00e9ho p\u0159\u00edpravku a zku\u0161ebn\u00ed rychlosti 8 m\/s. V\u00fd\u0161e uveden\u00fd prom\u011bnliv\u00fd modul souvis\u00ed s pr\u016fb\u011bhem st\u0159edn\u00ed deformace (modr\u00fd r\u00e1me\u010dek) 0 a\u017e 0,8% v pr\u016fb\u011bhu cel\u00e9 zkou\u0161ky.<\/p><p>Lze pozorovat, \u017ee ob\u011b k\u0159ivky se p\u0159\u00edli\u0161 neli\u0161\u00ed, co\u017e vede k domn\u011bnce, \u017ee pou\u017eit\u00ed sn\u00edma\u010de zat\u00ed\u017een\u00ed bez dal\u0161\u00ed m\u011b\u0159ic\u00ed techniky je rovn\u011b\u017e efektivn\u00ed. P\u0159i vy\u0161\u0161\u00edch zku\u0161ebn\u00edch sil\u00e1ch doch\u00e1z\u00ed k odchylk\u00e1m, kter\u00e9 jsou zp\u016fsobeny kmitaj\u00edc\u00edmi silami a odra\u017een\u00fdmi nap\u011b\u0165ov\u00fdmi vlnami v zat\u011b\u017eovac\u00edm soustav\u011b. Na za\u010d\u00e1tku zkou\u0161ky se v soustav\u011b zat\u00ed\u017een\u00ed indukuj\u00ed nap\u011b\u0165ov\u00e9 vlny, kter\u00e9 vedou k oscilac\u00edm v silov\u00e9m sign\u00e1lu, jak je patrn\u00e9 mezi 25 a 75 \u03bcs. V pr\u016fb\u011bhu zkou\u0161ky se tyto nap\u011b\u0165ov\u00e9 vlny \u0161\u00ed\u0159\u00ed zat\u011b\u017eovac\u00edm \u00fastroj\u00edm a sn\u00edma\u010dem zat\u00ed\u017een\u00ed, kde se odr\u00e1\u017eej\u00ed. V z\u00e1vislosti na jejich f\u00e1zov\u00e9m posunu a amplitud\u011b se vlny mohou vz\u00e1jemn\u011b ru\u0161it nebo zesilovat, co\u017e n\u00e1sledn\u011b vede ke kol\u00edsav\u00fdm odchylk\u00e1m v silov\u00e9m sign\u00e1lu, jak je vid\u011bt mezi 75 a 125 \u03bcs. To ukazuje, \u017ee m\u011b\u0159en\u00ed s\u00edly pomoc\u00ed DIC anal\u00fdzy je \u010dasto nezbytn\u00e9 pro z\u00edsk\u00e1n\u00ed spolehliv\u00fdch v\u00fdsledk\u016f. \u0160\u00ed\u0159en\u00ed a interference tedy nelze p\u0159edv\u00eddat, a proto nen\u00ed pou\u017eit\u00ed korek\u010dn\u00edho faktoru \u00fa\u010dinn\u00e9. Silov\u00fd sign\u00e1l je v\u0161ak ovlivn\u011bn nap\u011b\u0165ov\u00fdmi vlnami m\u00e9n\u011b, ne\u017e se o\u010dek\u00e1valo, tak\u017ee je mo\u017en\u00e9 ur\u010dit spr\u00e1vn\u00e9 vlastnosti materi\u00e1lu pomoc\u00ed integrovan\u00e9ho sn\u00edma\u010de zat\u00ed\u017een\u00ed. Prvn\u00edm vysv\u011btlen\u00edm tohoto chov\u00e1n\u00ed by mohlo b\u00fdt pou\u017eit\u00ed ku\u017eelov\u00e9ho p\u0159ibli\u017eovac\u00edho p\u0159\u00edpravku, proto\u017ee neobsahuje pry\u017eov\u00fd krou\u017eek. Proto se neo\u010dek\u00e1vaj\u00ed \u017e\u00e1dn\u00e9 vlivy na vlastnosti materi\u00e1lu, zejm\u00e9na na za\u010d\u00e1tku zkou\u0161ky. V pr\u016fb\u011bhu zkou\u0161ky se v\u0161ak vlivy nap\u011b\u0165ov\u00fdch vln zvy\u0161uj\u00ed, proto\u017ee se odr\u00e1\u017eej\u00ed na sn\u00edma\u010di zat\u00ed\u017een\u00ed.<\/p><h3>b.   M\u011b\u0159en\u00ed posunut\u00ed a deformace<\/h3><p>S p\u0159edlo\u017eenou zku\u0161ebn\u00ed sestavou je k dispozici n\u011bkolik technik m\u011b\u0159en\u00ed deformace: P\u00edstn\u00ed zdvih, GDS a DIC. Zat\u00edmco zdvih p\u00edstu m\u011b\u0159\u00ed skute\u010dn\u00fd pohyb p\u00edstu v horn\u00ed \u010d\u00e1sti z\u00e1t\u011b\u017eov\u00e9 soustavy, GDS m\u011b\u0159\u00ed pouze posun mezi \u00fachyty. Naproti tomu p\u0159i anal\u00fdze DIC lze posuny a deformace zaznamen\u00e1vat p\u0159\u00edmo na vzorku.<\/p><p>Pouze pomoc\u00ed DIC anal\u00fdzy je tedy mo\u017en\u00e9 ur\u010dit skute\u010dn\u00e9 kmeny. Mezi t\u011bmito metodami se o\u010dek\u00e1vaj\u00ed rozd\u00edly, kter\u00e9 mohou b\u00fdt zp\u016fsobeny n\u00e1sleduj\u00edc\u00edmi vlivy:<\/p><ul><li>Sou\u010d\u00e1sti s r\u016fznou tuhost\u00ed zapojen\u00e9 do soupravy n\u00e1kladu<\/li><li>Pru\u017en\u00e1 deformace sou\u010d\u00e1st\u00ed v zat\u011b\u017eovac\u00edm souprav\u011b<\/li><li>Tlumic\u00ed \u00fa\u010dinky d\u00edky kompresn\u00edm a silov\u00fdm absorp\u010dn\u00edm vlastnostem pry\u017ee<\/li><li>M\u011b\u0159en\u00ed vzd\u00e1lenosti k<\/li><\/ul><p>Jak je vid\u011bt v <strong>Obr\u00e1zek 6<\/strong>, by v\u00fd\u0161e uveden\u00e9 vlivy mohly v\u00e9st k v\u00fdrazn\u00fdm odchylk\u00e1m v\u00fdsledn\u00fdch deforma\u010dn\u00edch k\u0159ivek. Sn\u00edma\u010d zdvihu p\u00edstu je podle o\u010dek\u00e1v\u00e1n\u00ed pom\u011brn\u011b line\u00e1rn\u00ed a v\u00fdrazn\u011b se li\u0161\u00ed od ostatn\u00edch k\u0159ivek, proto\u017ee do tohoto m\u011b\u0159en\u00ed je zahrnuta v\u011bt\u0161ina komponent a jejich deformace. Krom\u011b toho bylo mo\u017en\u00e9 pomoc\u00ed zdvihu p\u00edstu zaznamenat n\u00e1razy a v\u00edcen\u00e1sobn\u00e9 kolize s p\u0159ibli\u017eovac\u00ed p\u0159\u00edpravou. Odchylky mezi GDS a DIC jsou p\u0159i n\u00edzk\u00fdch deformac\u00edch mal\u00e9, ale s postupuj\u00edc\u00ed dobou zkou\u0161ky se zvy\u0161uj\u00ed. Jak je v\u0161ak vid\u011bt na zv\u011bt\u0161en\u00e9m \u0159ezu, sklony pou\u017eit\u00fdch te\u010den se v dan\u00fdch mez\u00edch vyrovn\u00e1vaj\u00ed, GDS tedy funguje dob\u0159e v r\u00e1mci mal\u00fdch deformac\u00ed, kde p\u0159ich\u00e1zej\u00ed v \u00favahu vlivy jako ohyb vzorku, probl\u00e9my s up\u00edn\u00e1n\u00edm nebo v\u016fle.<\/p><p>Za \u00fa\u010delem vizualizace rozlo\u017een\u00ed deformace na vzorku, <strong>Obr\u00e1zek 7 <\/strong>ukazuje celkovou deformaci v r\u016fzn\u00fdch zku\u0161ebn\u00edch \u010dasech. Je z\u0159ejm\u00e9, \u017ee geometrie vzorku funguje dob\u0159e, proto\u017ee rozlo\u017een\u00ed deformace v m\u011b\u0159ic\u00edm pr\u016f\u0159ezu je homogenn\u00ed. V dynamometrick\u00e9 \u010d\u00e1sti je v\u0161ak patrn\u00e9 nehomogenn\u00ed rozlo\u017een\u00ed deformace, kter\u00e9 je zp\u016fsobeno obousm\u011brnou orientac\u00ed vl\u00e1ken. Proto\u017ee je vzorek vyroben z nekone\u010dn\u00fdch vl\u00e1ken, p\u0159en\u00e1\u0161\u00ed se zat\u00ed\u017een\u00ed ve vrstv\u00e1ch 0\u00b0 uprost\u0159ed vzorku z m\u011brn\u00e9 do dynamometrick\u00e9 \u010d\u00e1sti.<\/p><p>zat\u00edmco na vn\u011bj\u0161\u00ed vl\u00e1kna p\u016fsob\u00ed men\u0161\u00ed s\u00edla. Z t\u011bchto zji\u0161t\u011bn\u00ed lze vyvodit z\u00e1v\u011br, \u017ee ka\u017ed\u00e9 lok\u00e1ln\u00ed m\u011b\u0159en\u00ed deformace, jako jsou tenzometry, nebude pro m\u011b\u0159en\u00ed s\u00edly v dynamometrick\u00e9 \u010d\u00e1sti spr\u00e1vn\u011b fungovat, proto\u017ee se zde m\u016f\u017ee vyskytovat nehomogenn\u00ed rozlo\u017een\u00ed deformace.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4582d44 elementor-widget elementor-widget-image\" data-id=\"4582d44\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests-fig7-specimen-strain-distribution-at-diff.-test-times.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests-fig7-specimen-strain-distribution-at-diff.-test-times\" data-elementor-lightbox-description=\"Figure7: Specimen strain distribution at diff. test times\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTYzNDEsInVybCI6Imh0dHBzOlwvXC9zaGltYWR6dS10ZXN0aW5nLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNFwvMDlcL2RldmVsb3BtZW50LW9mLWEtaG9saXN0aWMtYXBwcm9hY2gtZm9yLWZvcmNlLWFuZC1zdHJhaW4tbWVhc3VyZW1lbnRzLWluLWhpZ2gtc3BlZWQtdGVuc2lsZS10ZXN0cy1maWc3LXNwZWNpbWVuLXN0cmFpbi1kaXN0cmlidXRpb24tYXQtZGlmZi4tdGVzdC10aW1lcy5qcGcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"974\" height=\"712\" src=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests-fig7-specimen-strain-distribution-at-diff.-test-times.jpg\" class=\"attachment-large size-large wp-image-16341\" alt=\"Obr\u00e1zek7: Rozlo\u017een\u00ed deformace vzorku p\u0159i r\u016fzn\u00fdch \u010dasech zkou\u0161ky\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Obr\u00e1zek7: Rozlo\u017een\u00ed deformace vzorku p\u0159i r\u016fzn\u00fdch \u010dasech zkou\u0161ky<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2a0cd68 elementor-widget elementor-widget-text-editor\" data-id=\"2a0cd68\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2><strong>Z\u00e1v\u011bry a v\u00fdhled\n<\/strong><\/h2>\nV r\u00e1mci t\u00e9to pr\u00e1ce bylo na vysokorychlostn\u00edm r\u00e1zov\u00e9m zku\u0161ebn\u00edm stroji HITS-TX provedeno srovn\u00e1n\u00ed integrovan\u00fdch syst\u00e9m\u016f a dal\u0161\u00edch technik pro m\u011b\u0159en\u00ed zku\u0161ebn\u00edch sil a posun\u016f. Zejm\u00e9na tyto dva parametry byly definov\u00e1ny jako kritick\u00e9, proto\u017ee mohou b\u00fdt ovlivn\u011bny oscilacemi, kter\u00e9 jsou d\u016fsledkem n\u00e1razu uvnit\u0159 p\u0159ibli\u017eovac\u00edho za\u0159\u00edzen\u00ed. Bylo p\u0159edstaveno inovativn\u00ed m\u011b\u0159en\u00ed pomoc\u00ed kamery HPV-X2 a anal\u00fdzy DIC, pomoc\u00ed kter\u00e9ho lze vypo\u010d\u00edtat skute\u010dn\u00e9 zku\u0161ebn\u00ed s\u00edly a celkov\u00e9 deformace.\nBylo mo\u017en\u00e9 uk\u00e1zat, \u017ee silov\u00fd sign\u00e1l sn\u00edma\u010de s\u00edly vykazuje pouze nepatrn\u00e9 odchylky od DIC-anal\u00fdzy, tak\u017ee generov\u00e1n\u00ed materi\u00e1lov\u00fdch vlastnost\u00ed je mo\u017en\u00e9 zejm\u00e9na p\u0159i n\u00edzk\u00fdch deformac\u00edch, jako p\u0159i stanoven\u00ed modulu pru\u017enosti. Tento postup lze pou\u017e\u00edt pro aplikace, jako je vytv\u00e1\u0159en\u00ed materi\u00e1lov\u00fdch dat pro \u00fa\u010dely simulace, zejm\u00e9na pokud je testov\u00e1n\u00ed sou\u010d\u00e1st\u00ed v re\u017eimu vysokorychlostn\u00edho nebo n\u00e1razov\u00e9ho zat\u00ed\u017een\u00ed n\u00e1kladn\u00e9.\nPokud jde o m\u011b\u0159en\u00ed posunut\u00ed a deformace, byla zd\u016frazn\u011bna jasn\u00e1 z\u00e1vislost na pou\u017eit\u00ed vhodn\u00e9 m\u011b\u0159ic\u00ed techniky. Tam, kde lze p\u0159i n\u00edzk\u00fdch deformac\u00edch pou\u017e\u00edt GDS, je p\u0159i ur\u010dov\u00e1n\u00ed celkov\u00fdch deformac\u00ed p\u0159i poru\u0161en\u00ed vzorku nezbytn\u00e9 pou\u017e\u00edt anal\u00fdzu DIC. Pomoc\u00ed DIC lze tak\u00e9 realizovat lok\u00e1ln\u00ed m\u011b\u0159en\u00ed deformace a rozlo\u017een\u00ed deformace na cel\u00e9m vzorku. D\u00edky spou\u0161t\u011bn\u00ed a synchronizaci propojen\u00edm HPV-X2 a HITS-TX je v\u017edy zaji\u0161t\u011bn dostate\u010dn\u00fd po\u010det sn\u00edmk\u016f pro vyhodnocen\u00ed deformace a pohodln\u00e1 anal\u00fdza dat.\n\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c9f8cc6 elementor-widget elementor-widget-image\" data-id=\"c9f8cc6\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests-fig6-displacements-measured-by-piston-stroke-gds-and-dic.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests-fig6-displacements-measured-by-piston-stroke,-gds-and-dic\" data-elementor-lightbox-description=\"Figure 6: Displacements measured by piston stroke, GDS and DIC\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTYzNDAsInVybCI6Imh0dHBzOlwvXC9zaGltYWR6dS10ZXN0aW5nLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNFwvMDlcL2RldmVsb3BtZW50LW9mLWEtaG9saXN0aWMtYXBwcm9hY2gtZm9yLWZvcmNlLWFuZC1zdHJhaW4tbWVhc3VyZW1lbnRzLWluLWhpZ2gtc3BlZWQtdGVuc2lsZS10ZXN0cy1maWc2LWRpc3BsYWNlbWVudHMtbWVhc3VyZWQtYnktcGlzdG9uLXN0cm9rZS1nZHMtYW5kLWRpYy5qcGcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"470\" src=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/development-of-a-holistic-approach-for-force-and-strain-measurements-in-high-speed-tensile-tests-fig6-displacements-measured-by-piston-stroke-gds-and-dic-1024x470.jpg\" class=\"attachment-large size-large wp-image-16340\" alt=\"Obr\u00e1zek 6: Posuny m\u011b\u0159en\u00e9 pomoc\u00ed zdvihu p\u00edstu, GDS a DIC\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Obr\u00e1zek 6: Posuny m\u011b\u0159en\u00e9 pomoc\u00ed zdvihu p\u00edstu, GDS a DIC<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-12c872a elementor-widget elementor-widget-text-editor\" data-id=\"12c872a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2><strong>\uf0a7 Odkazy<br \/><\/strong><\/h2><p>[1] K. Naresh, K Shankar, B.S. Rao, R. Velmurugan: Vliv vysok\u00e9 deforma\u010dn\u00ed rychlosti na epoxidov\u00e9 laminovan\u00e9 kompozity vyztu\u017een\u00e9 skeln\u00fdmi\/uhl\u00edkov\u00fdmi\/hybridn\u00edmi vl\u00e1kny. Composites Part B 100 (2016) 125-135.<br \/>doi: org\/10.1016\/j.compositesb.2016.06.007<br \/><br \/>[2] Y. Ou, D. Zhu, L. Huang, Y. Yao: Mechanick\u00e1 charakterizace tahov\u00fdch vlastnost\u00ed kompozitu vyztu\u017een\u00e9ho sklen\u011bn\u00fdmi vl\u00e1kny a jimi vyztu\u017een\u00fdm polymerem (GFRP) p\u0159i r\u016fzn\u00fdch rychlostech deformace a teplot\u00e1ch. Polymery 8<br \/>(5) (2016) 1-16.<br \/>doi: 10.3390\/polym8050196<br \/><br \/>[3] J. M. L. Reis, F. L. Chaves, H. S. da Costa Mattos: Chov\u00e1n\u00ed polyuretanu vyztu\u017een\u00e9ho sklen\u011bn\u00fdmi vl\u00e1kny v tahu p\u0159i r\u016fzn\u00fdch rychlostech deformace. Materials and Design 49 (2013) 192-196.<br \/>doi: 10.1016\/j.matdes.2013.01.065<br \/><br \/>[4] SAE J2749: Zkou\u0161en\u00ed polymer\u016f v tahu p\u0159i vysok\u00e9 deforma\u010dn\u00ed rychlosti.<br \/><br \/>[5] M. Keuerleber: Keleber: Determination of Young's modulus of plastics at high strain rates by the example of PP (v n\u011bm\u010din\u011b), doktorsk\u00e1 pr\u00e1ce, Stuttgart (2006).<br \/><br \/>[6] DIN EN ISO 26203-2: Kovov\u00e9 materi\u00e1ly - Zkou\u0161ka tahem p\u0159i vysok\u00fdch deforma\u010dn\u00edch rychlostech - \u010c\u00e1st 2: Servohydraulick\u00e9 a jin\u00e9 zku\u0161ebn\u00ed syst\u00e9my (v n\u011bm\u010din\u011b).<br \/><br \/>[7] Myslicki, S.; Ortlieb, M.; Frieling, G.; Walther, F.: High-precision deformation and damage development assessment of composite materials by high-speed camera, high-frequency impulse and digital image correlation techniques. Materials Testing 57 (11-12) (2015) 933-941.<br \/>doi: org\/10.3139\/120.110813<br \/><br \/>[8] \u010cSN EN ISO 527-1: Plasty - Stanoven\u00ed tahov\u00fdch vlastnost\u00ed - \u010c\u00e1st 1: Obecn\u00e9 z\u00e1sady (v n\u011bm\u010din\u011b).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-03d8238 elementor-widget elementor-widget-spacer\" data-id=\"03d8238\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-167ca2b e-flex e-con-boxed e-con e-parent\" data-id=\"167ca2b\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2bb8546 elementor-widget elementor-widget-heading\" data-id=\"2bb8546\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">St\u00e1hnout<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-951c335 downloads-liste elementor-widget elementor-widget-text-editor\" data-id=\"951c335\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul>\n<li><a href=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/observing-the-failure-of-open-hole-cfrp-specimens-in-tensile-tests.pdf\">Pou\u017eit\u00ed: Pozorov\u00e1n\u00ed lomu jednosm\u011brn\u00e9ho CFRP p\u0159i statick\u00e9 tahov\u00e9 zkou\u0161ce<\/a><\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-311c692 elementor-widget elementor-widget-spacer\" data-id=\"311c692\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a119d2d elementor-hidden-desktop elementor-hidden-tablet elementor-hidden-mobile elementor-widget elementor-widget-button\" data-id=\"a119d2d\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/tensile-test-of-plastics-with-automatic-extensometer.pdf\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Zkou\u0161ka plast\u016f v tahu pomoc\u00ed extenzometru (PDF)<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Crash loads with high strain rates can often be found in automotive and aerospace industries, so that a material charac&#8230;<\/p>","protected":false},"author":5,"featured_media":16421,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[340,357],"tags":[],"class_list":["post-16397","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-high-speed-video-camera","category-hpv-x2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Force &amp; Strain Measurement in High-Speed Tensile Tests<\/title>\n<meta name=\"description\" content=\"Explore Shimadzu&#039;s comprehensive method for measuring force and strain in high-speed tensile tests using the HPV-X2 camera for dynamic material analysis.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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