Cohesive Zone Modeling of Stable Crack Propagation in Highly Ductile Steel
A recent cohesive zone model is applied to the simulation of crack extension in austenitic stainless steel under large scale yielding conditions. The shape of the corresponding exponential traction-separation-relation can be modified in a wide range. In order to investigate the sensitivity regarding the cohesive zone parameters, a systematic parametric study is performed. The shape of the traction-separation envelope has a minor effect on the results compared to the cohesive strength and the work of separation. The aim is to fit experimental data by an appropriate choice of these parameters. Therefore, not only force-displacement curves should be used, but also crack growth resistance curves should be employed. A promising strategy for parameter identification is derived.
Luis Rodríguez-Tembleque, Jaime Domínguez and Ferri M.H. Aliabadi
A. Burgold et al., "Cohesive Zone Modeling of Stable Crack Propagation in Highly Ductile Steel", Key Engineering Materials, Vol. 774, pp. 167-172, 2018