Compression testing is a very common testing method that is used to establish the compressive force or crush resistance of a material and the ability of the material to recover after a specified compressive force is applied and even held over a defined period of time. Compression tests are used to determine the material behaviour under a load. The maximum stress a material can sustain over a period under a load (constant or progressive) is determined.
Compression testing is often done to a break (rupture) or to a limit. When the test is performed to a break, break detection can be defined depending on the type of material being tested. When the test is performed to a limit, either a load limit or deflection limit is used.
Common compression testing results are:
- Load at Rupture
- Deflection at Rupture
- Work at Rupture
- Maximum Load
- Deflection at Maximum Load
- Work at Maximum Load
- Stiffness
- Chord Slope
- Offset Yield
- Stress
- Strain
Typical graph showing compression test:
Typical graph showing compression test to rupture:
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