The effects of residual stress on elastic-plastic fracture propagation and stability

摘要

Residual stresses in materials affect their resistance to the initiation of fracture and to subsequent crack growth. Using full-field strain measurements and finite element analysis we demonstrate that the effect of residual stress on a material's crack growth resistance curve can be understood using elastic-plastic fracture mechanics. It is shown that Leis modifiedf-integral formulation (J(mod)) is a good predictor of the load vs crack extension behaviour of an elastic-plastic material containing residual stresses. (C) 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenscs/by/4.0/).