FE颗粒密度对CU-FE-P合金残余应力影响的数值模拟

苏娟华; 许莹莹; 禹兴胜; 陈钢; 刘平

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FE颗粒密度对CU-FE-P合金残余应力影响的数值模拟
Numerical Simulation on the Effects of Fe Particles Density on Residual Stress of Cu-Fe-P Alloy
2006年第2期页码：90-92
纸质出版日期： 2006 ，
DOI：

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[1]苏娟华,许莹莹,禹兴胜,陈钢,刘平.FE颗粒密度对CU-FE-P合金残余应力影响的数值模拟[J].特种铸造及有色合金,2006(02):90-92+62.

Su Juanhua~1, Xu Yingying~1, Yu Xingsheng~2, et al. Numerical Simulation on the Effects of Fe Particles Density on Residual Stress of Cu-Fe-P Alloy[J]. Special Casting & Nonferrous Alloys, 2006,(2):90-92.
[1]苏娟华,许莹莹,禹兴胜,陈钢,刘平.FE颗粒密度对CU-FE-P合金残余应力影响的数值模拟[J].特种铸造及有色合金,2006(02):90-92+62. DOI：

Su Juanhua~1, Xu Yingying~1, Yu Xingsheng~2, et al. Numerical Simulation on the Effects of Fe Particles Density on Residual Stress of Cu-Fe-P Alloy[J]. Special Casting & Nonferrous Alloys, 2006,(2):90-92. DOI：

摘要

采用弹塑性有限元方法建立力学模型

模拟分析微观状态下的引线框架材料CU-FE-P合金局部铁颗粒密集区的残余应力分布

重点分析了颗粒密度对材料残余应力的影响。结果表明

颗粒密度越大则界面附近CU基体和铁颗粒的残余应力越大

并且在X方向FE颗粒处于压缩

CU基体主要处于拉伸状态;Y方向则是FE颗粒受拉伸

CU基体由拉伸变化到压缩状态。因此在两种反向残余应力作用下

界面两侧的应力差也越大

甚至导致界面处被撕裂

材料表面起皮

影响带材性能的发挥。

Abstract

The distribution of residual stress in local Fe particle concentration region of Cu-Fe-P alloy for lead frame was simulated by a kinetic model based on the asto-plastics deformation finite element method

and the effects of Fe particles density on the residual stress of the materials were stressed.The results show that the residual stress of Cu matrix and Fe article near interface is increased with the increase of the Fe particle density.Meanwhile

Fe particle is compressed and Cu matrix is extended in the X direction while the Fe particle is extended and the Cu matrix is compressed in Y direction

which results in the increase of the stress difference between both sides of the interface

even leading to be torn of the interface and the advents of the surface peeling

influencing the properties of the Cu-Fe-P alloy.