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首页> 外文期刊>Key Engineering Materials >An Inverse Analysis Approach to Identify the Elastic-Plastic Material Properties of Al-Based Functionally Graded Materials
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An Inverse Analysis Approach to Identify the Elastic-Plastic Material Properties of Al-Based Functionally Graded Materials

机译：识别铝基功能梯度材料弹塑性材料特性的逆分析方法

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摘要

An inverse analysis approach to estimate continuously changing nonlinear material behavior for Functionally Graded Materials via simple plane strain compression test, is presented. A method in Nonlinear programming is applied To find an appropriate set of material parameters, which determine the elastic-plastic stress-strain relationship in the FGM. Error function, which compares the experimentally and numerically obtained deformation fields, was introduced and was Regarded as a nonlinear function of the unknown material parameters. The estimation of the material behavior was Reduced to a minimization problem for the error function, with respect to unknown parameters. Thus, a method in Nonlinear Programming (Steepest Decent) was adopted and the minimization problem was solved. The variation of Elastic-plastic material behavior in Al-Al_3Ni Functionally Graded Material, was identified.
机译：提出了一种通过简单的平面应变压缩测试来估计功能梯度材料的连续变化非线性材料行为的逆分析方法。应用非线性编程中的一种方法来找到一组合适的材料参数，这些参数确定了FGM中的弹塑性应力-应变关系。引入了误差函数，该误差函数比较了实验和数值获得的变形场，并被视为未知材料参数的非线性函数。相对于未知参数，材料行为的估计被简化为误差函数的最小化问题。因此，采用了非线性规划（最陡体面）方法并解决了最小化问题。确定了Al-Al_3Ni功能梯度材料中弹塑性材料行为的变化。

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