| 适应于材料深拉延的延性损伤模型及其应用 |
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| 引用本文： | 樊建平,章建军,陈传尧.适应于材料深拉延的延性损伤模型及其应用[J].华中科技大学学报(自然科学版),2001,29(7):101-103. |
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| 作者姓名： | 樊建平 章建军 陈传尧 |
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| 作者单位： | 华中科技大学土木工程与力学学院 |
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| 摘 要： | 以弹塑性有限元基本方程为基础，引入等效应变并采用与弹性损伤模量相关的塑性流动法则，得到对称弹塑性损伤刚度矩阵，根据损伤应变能释放率与损伤变量的对偶关系，提出损伤耗散势的幂率形式，导出了损伤演化规律，将此理论方法用于圆盘的深拉延数值分析，给出由损伤所引起的材料性能退化对冲头力的影响，得出损伤演化规律。
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| 关 键 词： | 延性损伤 深拉延 有限元方法 弹性损伤模量 损伤力学 金属薄板成形 变形 |
| 文章编号： | 1000-8616(2001)07-0101-03 |
| 修稿时间： | 2001年3月1日 |
A Ductile Damage Model for Deep-drawing Process |
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| Fan Jianping Zhang Jianjun Chen Chuanyao Assoc. Prof., College of Civil Eng. & Mech.,HUST,Wuhan ,China..A Ductile Damage Model for Deep-drawing Process[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2001,29(7):101-103. |
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| Authors: | Fan Jianping Zhang Jianjun Chen Chuanyao Assoc Prof College of Civil Eng & Mech HUST Wuhan China |
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| Institution: | Fan Jianping Zhang Jianjun Chen Chuanyao Assoc. Prof., College of Civil Eng. & Mech.,HUST,Wuhan 430074,China. |
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| Abstract: | Based on the ductile fracture caused by micro void nucleation, growth and coalescence into micro crack, an isotropic damage model is proposed and coupled with elasto plastic constitutive equation. The analysis of finite element is coded with FORTRAN language and applied to analyze the deep drawing of cylindrical cup. Effect of materical degenetation caused by damage on punch force is described. Damage is obtained and the numerical calculation for punch force shows good agreement with the experimental measure. |
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| Keywords: | ductile damage deep drawing fracture fully coupled finite element method |
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