Fracture analysis of thin Aluminum Sheet by J integer and C T O D technique using FEA validated by Experimental

摘要

A J integer and CTOD test are usually done on materials undergoes plastic deformation prior to failure. The testing material more or less resembles the original one, although dimensions can be reduced proportionally. More than 3 tests are done to minimize any experimental deviations. The specimen is placed on the work table and a notch is created exactly at the centre. The crack should be generated such that the defect length is about half the depth. The load applied on the specimen is generally a three point bending load. A strain gauge is used to measure the crack opening. Crack tip plastically deforms until a critical point after which a crack is initiated that may lead to either partial or complete failure.