基于修正Drucker-Prager Cap模型的金属粉末成形本构模型参数确定方法

doi:10.11896/j.issn.1005-023X.2018.06.031

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Abstract Aiming to provide alleviations for the problems of the modified Drucker-Prager Cap model including complexity and low accuracy of the obtained parameters, a combinational constitutive parameter determining method that involves both simple expe-riment and inverse optimization was proposed and applied to numerical simulation of metal powder compaction. First, the important inverse optimization parameter called the cap eccentricity parameter R was determined by the experimental analysis and theoretical derivation. Then, the simulation method using ABAQUS finite element platform and MATLAB optimization algorithm was implemented for inverse optimization of parameter R and calculation of the related hardening parameters. The metal powder Distaloy AE was used to discuss the influence of the inverse results of different R on the numerical simulation of powder compaction process. The results showed that the cap eccentricity parameter R₂ and its associated hardening parameters were more accurate than R₁ for the numerical simulation of the pressing force, ejection force, relative density and residual stresses.

Key words： metal powder compaction constitutive model parameters modified Drucker-Prager Cap model inverse optimization

Published: 25 March 2018

CLC number:

TF12

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	Articles by authors
	ZHOU Rui
	LI Lulu
	XIE Dong
	ZHANG Jianguo
	WU Mengli

Cite this article:

ZHOU Rui,LI Lulu,XIE Dong, et al. A Determining Method of Constitutive Parameters for Metal Powder Compaction Based on Modified Drucker-Prager Cap Model[J]. Materials Reports, 2018, 32(6): 1020-1025.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.06.031 OR http://www.mater-rep.com/EN/Y2018/V32/I6/1020

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