Week 1 Q7

A compression test requires a higher capacity machine than tensile test due to the fact that compressive strength of any material is higher than its tensile strength. Moreover, in compresion test cross-section area of the material increases as the loading propagates which requires more load for any subsequent deformation. Further, the specimen also begin to bulge on the both sides and become barrel shaped as shown in figure. This flattned out shape offers more resistance to the fracture.

Hence, a compresion test will require a higher capacity machine than the tensile test.