An introduction to fracture mechanics for engineers

Abstract

This concluding paper of a three part series concentrates on elastic/plastic fracture mechanics. The COD parameter is introduced as an extension of the stress intensity factor concept (Mats. in Eng. Appl 1, 2, pp 121–128, 1978 and 1, 4, pp 227–235, 1979). The energy balance approach to crack extension is then discussed in order to show how the J-integral can be used as a measure of energy changes in cracked bodies with non-linear stress/strain response.