Fracture toughness and failure limits in sheet metal forming
Fracture toughness and failure limits in sheet metal forming
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DOI：
10.1016/j.jmatprotec.2016.03.029
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发表时间：
2016-08
影响因子：
6.3
通讯作者：
M. B. Silva;K. Isik;A. Tekkaya;A. Atkins;P. Martins
中科院分区：
文献类型：
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作者：
M. B. Silva;K. Isik;A. Tekkaya;A. Atkins;P. Martins
本文提出了金属板材成形中塑性流动、空隙合并和生长、延性损伤、裂纹张开模式和断裂韧性之间的联系。这种新的集成视图基于一个分析框架，该框架允许直接根据材料应力-应变响应以及从拉伸和平面扭转（面内剪切）加载的双缺口测试样本获得的断裂韧性和断裂厚度来估计主应变空间中断裂轨迹的位置。 1 毫米厚的 AA1050-H111 铝板的实验支持了所提出的分析框架。
This paper proposes a link between plastic flow, void coalescence and growth, ductile damage, crack opening modes and fracture toughness in sheet metal forming. This new integrated view is based on an analytical framework that allows estimating the location of the fracture loci in the principal strain space directly from material stress–strain response and from fracture toughness and thickness at fracture obtained from double-notched test specimens loaded in tension and plane torsion (in-plane shear). Experiments in AA1050-H111 aluminium sheets with 1 mm thickness give support to the proposed analytical framework.