Tham khảo tài liệu 'polyme analysis 2010 part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Impact Testing Compression test Scope sCompressive properties describe the behavior of a material when it is subjected to a compressive load. SLoading is at a relatively low and uniform rate. s Compressive strength and modulus are the two most common values produced. Specimen size SBlocks or cylinders SFor ASTM D695 The typical blocks x x The cylinders diameter and long SFor ISO 604 the preferred specimens 50 x 10 x 4mm for modulus 10 x 10 x 4mm for strength Compression test Test Procedure The specimen is placed between compressive plates parallel to the surface. The specimen is then compressed at a uniform rate. The maximum load is recorded along with stress-strain data. An extensometer attached to the front of the fixture is used to determine modulus. maximum compressive load Compressive strength ----------------------------- minimum cross-sectional area change in stress Compressive modulus --------------- change in .