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Compression testing is a very common testing method. It may be used to measure the compressibility of a material as well as the recovery of a material that has been compressed to a load and held over a time period. Compressive tests are used to determine the material behaviour under load. The maximum stress a material can sustain over a period of time under load (constant or progressive) is determined.

Compression testing is often done to a break or to a limit. When the test is performed to a break (rupture), a break detector is used. When the test is performed to a limit, either a load limit or deflection limit is used.

Common results available from Lloyd Instruments™ materials testing systems for compression testing 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

Compression testing can be carried out on a range of Lloyd Instruments materials testing machines together with NEXYGENPlus data analysis software when more comprehensive testing results are required.

Common standards for determining Compressive Strength

• ASTM C773
  
• ASTM D575
  
• ASTM D623
  
• ASTM D695
  
• ASTM D395
  
• ASTM E9
  
• ASTM E209
  
• ASTM F36