Mechanical Properties

Stress/Strain Curves

· Testing machines are used to measure material response to various load-time profiles.
· The diagram shows an Instron 8501 servo-hydraulic machine that can be used for obtaining material mechanical data.
· Constant strain-rate measurements are normally used to obtain elastic constant, plastic deformation, and fracture data.
· Materials may also be tested under load control, where the applied stress follows a programmed profile.