材料压缩变形过程应变场分布的函数表示法  

Function Representation for the Strain Field Distributions during Compression Deformation

作　　者：陈锟[1] 刘克家[1] 傅晓强[1] 魏昭国[1] 金嘉杰[1] 胡治华[1] 

机构地区：[1]上海应用技术学院材料科学与工程学院,上海201418

出　　处：《上海应用技术学院学报（自然科学版）》2013年第2期89-92,共4页Journal of Shanghai Institute of Technology: Natural Science

基　　金：上海市教委"材料加工工程"重点学科建设资助项目(J51504);上海市大学生科技创新项目(PE2012005)

摘　　要：提出了材料压缩变形过程应变场分布规律描述的一种新方法,即"应变场函数表示法"。通过数值模拟分析方法获得压缩变形过程中材料内部应变的数值分布,并采用网格法对其进行实验验证,验证结果表明:二者反映的压应变分布规律基本一致,且在数值上符合较好;而后采用传统的数学方法——函数的拟合方法,得出对称轴处应变场分布的解析函数,这就给出了材料内部变形分布的函数表达规律,并为进一步分析材料压缩变形过程提供了理论基础。本方法为科学制定变形工艺参数提供了重要依据。A new method for describing the strain field distributions during compression deformation was proposed,i, e. ,function representation for the strain field. The distribution of strain field was obtained by numerical simulation and one of the experimental methods, i. e., grid method, was adopted to verify the numerical solution. The compressive strain distribution obtained from simulation results was in basic agreement with that from experimental results. Then mathematical fitting was employed to obtain the approximate function expression of the strain field distributions in the symmetric axis. It gives the characteristic of deformation distribution expressed by analytic function and also provides theoretical basis for the further analysis of compression deformation. This new method provides the scientific basis for process design in industrial practice.

关 键 词：压缩变形 应变场 函数表示法 网格法 数值模拟 

分 类 号：TB302.3[一般工业技术—材料科学与工程]