| 负间隙精冲的大变形弹塑性有限元分析 |
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| 引用本文： | 李建华,张忠美.负间隙精冲的大变形弹塑性有限元分析[J].锻压技术,2008,33(5). |
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| 作者姓名： | 李建华 张忠美 |
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| 作者单位： | 中原工学院机电学院,河南郑州,450007;中原工学院机电学院,河南郑州,450007 |
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| 基金项目： | 河南省科技厅基础研究项目 |
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| 摘 要： | 负间隙精密冲裁是一个复杂的力学过程,涉及弹性变形、塑性变形、损伤软化和韧性断裂等现象.本文使用DEFORM-2D软件对AISI-1045钢进行了弹塑性大变形有限元数值模拟,将McClintock断裂准则应用于负间隙精冲韧性断裂的预测中,预测了材料变形过程中的静水应力、等效应力和等效应变的分布以及发展趋势.并依据仿真条件和模拟结果分析,通过实验的方法获得了不同负间隙下的无毛刺冲裁件.
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| 关 键 词： | 负间隙 弹塑性有限元 精密冲裁 韧性断裂 |
FEM analysis of large elasto-plastic deformation for fine-blanking with negative clearance |
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| LI Jian-hua,ZHANG Zhong-mei.FEM analysis of large elasto-plastic deformation for fine-blanking with negative clearance[J].Forging & Stamping Technology,2008,33(5). |
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| Authors: | LI Jian-hua ZHANG Zhong-mei |
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| Affiliation: | LI Jian-hua,ZHANG Zhong-mei(Mechanical , Electronic School,Zhongyuan University of Technology,Zhengzhou 450007,China) |
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| Abstract: | Fine-blanking with negative clearance is a complex mechanics process,it relates to the phenomena of elastic deformation,plastic deformation,damnification inteneratation,ductile fracture and so on.By using DEFORM-2D software and McClintock ductile fracture criteria,the process simulation for AISI-1045 steel was done with large deformation elasto-plastic FEM.The distributions and developing trends of static hydraulic pressure,equivalent stress,and equivalent strain were predicted.According to the analysis of ... |
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| Keywords: | negative clearance elasto-plastic FEM fine-blanking ductile fracture |
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