| 索涛,李玉龙,刘元镛,郭亚洲.等径通道挤压过程三维有限元模拟[J].计算力学学报,2006,23(6):754~759 |
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| 等径通道挤压过程三维有限元模拟 |
| 3D Finite element simulation of equal channel angular pressing |
| 修订日期：2004-12-13 |
| DOI：10.7511/jslx20066141 |
| 中文关键词: 等径通道挤压 三维有限元模拟 等效塑性应变 |
| 英文关键词:equal channel angular pressing,3D finite element,equivalent plastic strain |
| 基金项目:西北工业大学校科研和教改项目 |
| 索涛 李玉龙 刘元镛 郭亚洲 |
| 西北工业大学航空学院,西安710072 |
| 摘要点击次数: 1797 |
| 全文下载次数: 8 |
| 中文摘要: |
| 利用三维有限元模型对等径通道挤压过程中变形分布的不均匀性进行了模拟，通过对不同摩擦系数下截面等效塑性应变分布比较发现：沿三个方向截面上的变形分布都不是均匀的，这说明二维有限元模型不能真实模拟等径通道挤压过程中试样中的变形分布。此外，摩擦对等效塑性应变分布及挤压力的影响较大，截面变形不均匀参数和最大等效塑性应变出现的位置随摩擦系数的增大而变化。压力一位移曲线的变化可以结合试样的变形过程来解释。 |
| 英文摘要: |
| In this paper,a three-dimensional finite element model is used to analyze the deformation inhomogeneity during a single pass of equal channel angular pressing(ECAP).The equivalent plastic strains under different friction conditions are compared.It is found that the equivalent plastic strain varies along three directions,which indicates 2D finite element model is unable to perfectly simulate the deformation distribution during ECAP process.The influence of friction on equivalent plastic strain and pressure is also found remarkable.The deformation inhomogeneity indexes and the location of maximum equivalent plastic strain are varied with the increasing friction coefficient.The different stages presented in the pressure versus displacement curves are associated with those in specimen deformation. |
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