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首页> 外文会议>2002 International Conference on Process Modeling in Powder Metallurgy amp; Particulate Materials Oct 28-29, 2002 Newport Beach, California >MATERIAL MODEL PARAMETER ESTIMATION BY INVERSE ANALYSIS OF A CLOSED DIE EXPERIMENT
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MATERIAL MODEL PARAMETER ESTIMATION BY INVERSE ANALYSIS OF A CLOSED DIE EXPERIMENT

机译：闭模实验反分析的材料模型参数估计

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摘要

The present work is concerned with the determination of material model parameters by use of inverse methods. The method used is related to recent work with inverse modelling for parameter estimation and uses the same software system. In the present work, the study is based on the results from a closed die pressing experiment which is considered to represent a homogenous state of stress and strain. Thus, the closed die experiment can be modelled with use of one element and the results from the analyses are compared with the axial and radial responses from the experiment. The object function in the inverse analysis is based on both the axial and radial responses. All non-elastic parameters of the model are determined simultaneously in the optimisation procedure. The parameter set obtained is used in an analysis of the pressing of a H-section axi-symmetric component and the results are compared with experimentally obtained density values. The presented methods represent a simple and straightforward procedure to evaluate new powder mixes in connection with powder pressing analyses.
机译：本工作涉及通过使用逆方法确定材料模型参数。所使用的方法与用于参数估计的逆建模的最新工作有关，并且使用相同的软件系统。在目前的工作中，该研究基于闭模压制实验的结果，该实验被认为代表了应力和应变的均匀状态。因此，可以使用一个元素对闭模实验进行建模，并将分析结果与实验的轴向和径向响应进行比较。反分析中的对象函数基于轴向和径向响应。在优化过程中同时确定模型的所有非弹性参数。将获得的参数集用于分析H型截面轴对称组件，并将结果与​​实验获得的密度值进行比较。提出的方法代表了一种简单直接的程序，可结合粉末压榨分析评估新的粉末混合物。

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