A ductile damage evolution model for the simulation of machining processes in materials with limited ductility

Autor(es)

Miscione, Juan Manuel Costa ; Ramirez, Bruna Niccoli ; Schon, Claudio Geraldo

• Tipo de documento: Artigo Científico
• Fonte: ENGINEERING FRACTURE MECHANICS; v. 271, p. 18-pg., 2022-08-01.

Resumo

A damage evolution model with Lode dependence is presented, based on fracture and damage mechanics, with regard to recent evidence supporting the theory of critical strain to fracture. The damage evolution is partitioned into two variables, D-E and D-sigma, which depend on the stress tensor evolution during plastic straining. The model is based on the definition of fracture as the disruption of plastic flow caused by a critical strain, considering the damage evolution as a function of fracture energy and the loading mode. The model successfully predicts the fractographic features present in ductile fractured tensile and compressive specimens and numerically predicts chip morphology in metal cutting, considering the complexity of the strain paths of which the material is subjected in the process. The influence of thermal coupling is left out of the present formulation on purpose, to stress the effect of the damage variables. (AU)

• Processo FAPESP: 18/22114-1 - Termodinâmica de ligas altamente concentradas: reequipamento do Laboratório de Computação em Ciência dos Materiais (LCCMat)
• Beneficiário: Claudio Geraldo Schon
• Modalidade de apoio: Auxílio à Pesquisa - Regular