Introduction & Purpose of Compression Test (KIMI) PDF

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INTRODUCTION What is a compression test? Basically compression test is any test which a material experience opposing forces that push inward upon the specimen from opposites sides or is otherwise compressed or flattened. Generally, the test sample is placed in between two plates that distribute the load across the entire surface area of two opposite faces of the test sample and then the plates are pushed together by universal test machine to make the sample flatten. Usually, a compressed sample is shortened in the direction of the applied forces and expands according to the direction perpendicular to the force. A compression test is essentially the opposite of the more common tension test. However, there are many different types to this basic test setup that involve any combination of different variables. The more common compression tests involve forces applied to more than one axis of the specimen as well as the testing of the sample at elevated and lowered temperatures. Uniaxial, biaxial, triaxial, cold temperature, elevated temperature, fatigue and creep are all examples of different compression tests that may be performed upon a material. So the purpose of the compression test is to determine the behaviour of a material while it face a compressive load by measuring fundamental variables, such as strain, stress, and deformation. By testing a sample in compression the compressive strength, yield strength, ultimate strength, elastic limit, and the elastic modulus among other parameters may all be determined. With the understanding of these different parameters and the values associated with a specific material it may be determined whether or not the material is suited for specific applications or if it will fail under the specified stresses.

REFERENCES 1. https://www.testresources.net/applications/test-types/compression-test/ 2. https://www.instron.us/en-us/our-company/library/test-types/compression-test...