Characterisation of ductile crack growth behaviour based on energy dissipation within intense strain region at crack tip

In order to analyse the formation and extension behaviour of intense strain region with stable crack growth, recrystallisation-etch technique, is applied to a wide variety of elastic-plastic fracture toughness specimens in steel A533B-1. For the purpose of quantitative evaluation, the energy dissipation (or plastic work) within intense strain regions, Wsub(p) is measured at the mid-plane of specimens. Influence of specimen size, geometry and loading configuration upon Wsub(p)-R, J-R and delta-R curves are examined. In conclusion the characterization of ductile crack growth can be performed more widely by means Wsub(p)-approach