AGX-V, Tensile Testing

Tensile Test according ISO 6892-1 using the long-range extensometer MFX 500-B

Figure 1 Longstroke Extensometer MFX 500-B

User Benefits

  • Complete integration of the long extensometer MFX 500-B with control via the TrapeziumX-V testing software
  • Large measurement range for precise determination of properties up to fracture
  • Suitable for testing according to ISO 6892-1 Method A and Method B

Introduction

For many applications, automatic longstroke extensometers have an advantage over clip-on extensometers. These sensors are in direct mechanical contact with the sample and, unlike most clip-on extensometers, can be used to measure displacement of the test piece up to fracture. Additionally, the measurement arms of these extensometers are automatically attached and removed.

This article describes testing according to ISO 6892-1 Method B using a Shimadzu universal testing machine of type AGX-V 300 kN and the automatic longstroke extensometer MFX 500-B.

 

Benefits of automatic longstroke extensometer MFX 500-B

The tactile longstroke extensometer MFX-500B offers the following benefits:
  • Ideally suited for strain control in tensile testing
  • Large measurement range for determining properties up to fracture – including brittle materials
    (e.g., cast high- strength steel or CFRP).
  • Automatic attachment and removal of the measuring arms
  • High measurement resolution
  • Control of the MFX 500-B via testing software Trapezium X-V – No manual control is required.

Test

In addition to many different samples tested with the extensometer MFX 500-B, reference steel test pieces with known material date are evaluated in this application. Two different test specimens differing in shape and steel grade are tested.

 

Test Piece

 

Figure 2 Test piece geometry according to 6892-1
Figure 2 Test piece geometry according to 6892-1
Table 1 Test piece geometry according ISO 6892-1
Table 1 Test piece geometry according ISO 6892-1

Test Conditions

The samples are conditioned at 19 ˚C and 26% humidity. The tests are conducted under the same conditions.

Table 2 System
Table 2 System
Table 3 Test method ISO 6892-1 Method B
Table 3 Test method ISO 6892-1 Method B

Results

The results for both test piece geometries show stable values of strain measurement with low standard deviations.

Table 4 Results of test piece geometry 1
Table 4 Results of test piece geometry 1
Table 4 Results of test piece geometry 1
Table 5 Results of test piece geometry 2
Table 5 Results of test piece geometry 2
Table 5 Results of test piece geometry 2

Conclusion

The longstroke extensometer MFX 500-B showed accurate and stable values for strain measurements. The results of the yield point at 2% strain and the fracture strain correspond with the literature values for this material and with the values obtained using other strain gauges. Furthermore, the conducted experiments and the results obtained, demonstrate the complete and fully automated integration of the system into the testing machine and its software. All requirements of ISO 6892-1 regarding strain control are met with this package.

 

The Package

Universal Testing Machine

AGX-V Series

Accessories

MFX 500-B

Isolated PIO Unit

Counter Unit + Connection Cable MFX Analog Output + Connection Cable MFX MFX 500-B ROM Version

Manual Wedge Grips MWG (Depending on test piece)

Software

Trapezium X-V 2.0.0 MFX

 

<References>

1) DIN EN ISO 6892-1: 2020-06

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Tensile Test of Plastic with Extensometer (PDF)

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Machines for Tensile Testing

Universal testing machines

AGX-V

Pro

Test force10, 20/50, 100, 300, 600 kN
Test typeTensile, bending & compression tests
DriveElectrical mechanical
TypeTable-top and floor-standing appliances
IndustriesUniversal

Universal testing machines

AGS-X

Advanced

Test force10, 20, 50, 100, 300 kN
Test typeTensile, bending & compression tests
DriveElectrical mechanical
TypeTable-top and floor-standing appliances
IndustriesUniversal

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EZ-SX/LX

Basic

Test force1 N – 500 N
Test typeTensile, bending & compression tests
DriveElectrical mechanical
TypeTable-top appliances
IndustriesUniversal

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