The hard and soft tensile testing machine is defined based on the __________

The hard and soft tensile testing machine is defined based on the __________ Correct Answer by the stiffness/spring constant of the machine

There is a great deal of difference between the device and sample tested in the machine. This difference gives discrepancy in results and sometimes will tend to miss useful information. The screw-driven machine is “hard machine”, and the hydraulically driven machine is “soft machine”.

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