期刊
ENGINEERING FRACTURE MECHANICS
卷 149, 期 -, 页码 262-275出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2015.07.014
关键词
Cutting; Material point method; Computational mechanics; Cohesive zones
类别
A material point method simulation of orthogonal cutting that can simulate cutting into steady-state chip curling is described. The modeling used ductile fracture mechanics with a cohesive zone in the cutting path. Robust simulations required a new mechanism to damp kinetic energy artifacts associated with dynamic crack propagation. The simulations displayed two regimes-crack-tip touching, where the tool reaches the crack tip, and plastic bending, where the tool is separated from the crack tip by a gap. The simulations were compared to analytical models that were revised to account for rubbing forces and hardening laws. (C) 2015 Elsevier Ltd. All rights reserved.
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