There are also subtle differences between the configuration of the tensile testing machine with large deformation and unmatched large deformation, which is reflected in the operation of the test. Today we will introduce three common test methods.
 

A: Fixed deformation: Test: Set the fixed deformation data (for example, 100.00mm), set the fixed stress to 0, enter the fixed deformation test state during the test, press the clear key to clear the test force and peak value, and clear the sample Installed between the upper and lower fixtures, and then clamp the two clamping jaws of the large deformation extensometer on the sample, and press the test. After the test starts, the displacement is automatically cleared to zero when the set deformation amount is reached (100.00mm) , The test automatically stops and ends. At the same time, record the test force value to achieve the deformation.
 

 B: Constant stress: Test: Set the constant stress data (for example, 1000.0N), set the constant deformation to 0, enter the constant stress test state during the test, press the clear key to clear the test force and peak value, and clear the sample Install between the upper and lower clamps, and then clamp the two clamping jaws of the large deformation extensometer on the sample, and press the test. After the test starts, the displacement is automatically cleared to zero. ), The test automatically stops and ends. At the same time record the amount of deformation when the test force is reached.
 

C: Breaking: Test: Set both the fixed deformation and the fixed stress to 0, press the clear button to clear the test force and peak value, install the sample between the upper and lower fixtures, and then set the two of the large deformation extensometer The clamping jaws are clamped on the sample, and the test is performed. After the test starts, the displacement is automatically cleared to zero, and the test is automatically stopped after the sample is broken. Simultaneously calculate the intensity = peak value / (width * thickness). Elongation = displacement at break / gauge length * 100%