| 铝合金板在循环塑性变形下的韧性断裂行为模拟(英文) |
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| 引用本文： | 胡星,赵亦希,李淑慧,林忠钦. 铝合金板在循环塑性变形下的韧性断裂行为模拟(英文)[J]. 中国有色金属学会会刊, 2011, 0(7): 1595-1601 |
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| 作者姓名： | 胡星 赵亦希 李淑慧 林忠钦 |
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| 作者单位： | 上海交通大学机械系统与振动国家重点实验室;上海交通大学上海市数字化汽车车身工程重点实验室; |
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| 基金项目： | Project(2010CB731703) supported by the National Basic Research Program of China; Project(0804) supported by the Shanghai Automotive Industry Corporation Foundation,China; Project(MSV-2010-03) supported by State Key Laboratory of Mechanical System and Vibration,Shanghai Jiao Tong University,China |
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| 摘 要： | 基于数值模拟的方法研究在循环塑性变形下铝合金板的力学行为。首先,通过Cockcroft-Latham韧性断裂准则得到材料的断裂极限应力图,并通过实验对成形极限应力图进行验证。数值模拟结果表明:滚边时弯曲中心的应变路径可以认为是平面应变状态;采用绳式滚边方法可以改善在弯曲中心线上的应力集中现象。从滚边断口的扫描电镜照片可以发现,循环塑性变形对铝合金板的韧性断裂行为有影响。
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| 关 键 词： | 铝合金 韧性断裂 增量成形 循环塑性变形 |
Numerical simulation of ductile fracture behavior for aluminum alloy sheet under cyclic plastic deformation |
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| HU Xing,ZHAO Yi-xi,LI Shu-hui,LIN Zhong-qin .State Key Laboratory of Mechanical System , Vibration,Shanghai Jiao Tong University,Shanghai ,China. Numerical simulation of ductile fracture behavior for aluminum alloy sheet under cyclic plastic deformation[J]. Transactions of Nonferrous Metals Society of China, 2011, 0(7): 1595-1601 |
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| Authors: | HU Xing ZHAO Yi-xi LI Shu-hui LIN Zhong-qin .State Key Laboratory of Mechanical System Vibration Shanghai Jiao Tong University Shanghai China |
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| Affiliation: | HU Xing1,ZHAO Yi-xi2,LI Shu-hui1,LIN Zhong-qin1 1.State Key Laboratory of Mechanical System and Vibration,Shanghai Jiao Tong University,Shanghai 200240,China,2.Shanghai Key Laboratory of Digital Auto-body Engineering |
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| Abstract: | A numerical analysis of mechanical behavior of aluminum alloy sheet under cyclic plastic deformation was investigated.Forming limit at fracture was derived from Cockcroft-Latham ductile damage criterion.The strain path of bending center of incremental roller hemming could be accepted as a kind of plane strain bending deformation process.Incremental rope roller hemming could be used to alleviate ductile fracture behavior by changing the stress state of the hemming-effected area.SEM observation on the fractur... |
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| Keywords: | aluminum alloy ductile damage incremental forming cyclic plastic deformation |
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