摘要
对ZK60合金超塑性单向拉伸过程中空洞生长进行了数值模拟和实验研究.分析了ZK60合金单向拉伸过程中空洞生长机理,并提出相应的模型.运用三维刚粘塑性有限元程序,模拟预报空洞半径和体积分数在单向拉伸过程中的变化规律.通过图像分析软件对材料微观组织进行观察,确定了实际空洞半径和体积分数.对模拟结果和实验进行了对比分析,得到模拟的空洞半径和体积分数与实验结果吻合良好,模拟的空洞长大规律呈指数增长模型.
In this paper, numerical simulation and experimental studies on the cavity growth were carried out in the case of uniaxial tension of ZK60 superplastic alloy. The mechanism of cavity growth in uniaxial tension process was analyzed to obtain the corresponding model. An exponentially increasing cavity growth model was introduced into this numerical simulation effectively. A three-dimensional rigid-visco plastic finite element method （FEM） program has been developed to predict the variation of cavity radius and volume fraction. The values of cavity radius and volume fraction obtained by numerical simulation were＇ in good agreement with experimental results.
出处
《哈尔滨理工大学学报》
CAS
北大核心
2009年第5期1-3,7,共4页
Journal of Harbin University of Science and Technology
基金
国家自然科学基金项目(50875067)
哈尔滨市科技攻关项目(2007AA1BE109)
关键词
ZK60合金
空洞半径
空洞体积分数
数值模拟
ZK60 magnesium alloy
cavity radius
cavity volume fraction
numerical simulation
