Construction of High Strain Rate Loading Constitutive Model and Failure Model and Prediction of Forming Limit for LA103Z Magnesium Alloy

Hailiang Yang; Xiao Wang; Peng Ni; Zhewen Li; Huixia Liu

doi:10.1007/s12540-021-01105-4

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자료유형: 학술저널

저자정보: Hailiang Yang (Jiangsu University) Xiao Wang (Jiangsu University) Peng Ni (Jiangsu University) Zhewen Li (Jiangsu University) Huixia Liu (Jiangsu University)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.28 No.8

발행연도: 2022.8

수록면: 1,938 - 1,947 (10page)

DOI: 10.1007/s12540-021-01105-4

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In order to use numerical simulation to reveal the formability of magnesium?lithium alloys and other light alloys under highstrain rate, it is crucial to construct a constitutive model and a forming limit diagram (FLD) of LA103Z alloy that was formedby laser shock at high strain rate. In this study, three different uniaxial tensile experiments on the ultralight alloy materialLA103Z magnesium alloy were conducted, the mechanical behavior of the material with sensitivity to high strain rate wasstudied, and a Johnson?Cook (JC) constitutive model sensitive to high strain rates and suitable for laser shock forming wasproposed. At the same time, the constitutive parameters and failure parameters of the modified JC model of LA103Z magnesiumalloy were obtained through three different uniaxial tensile experiments. On the basis of the relationship betweentensile loading and stress?strain of LA103Z magnesium alloy, the experiments demonstrated the precision of the modified JCconstitutive model. A modified constitutive model was then developed by using the user material subroutine VUMAT, andthen it was applied to ABAQUS. Finally, the formability of the material was simulated, and the FLD of LA103Z magnesiumalloy material in laser shock forming was predicted. This study provides guidance on the actual production and applicationof LA103Z magnesium alloys.

#Magnesium?lithium alloys · Strain rate sensitivity · Johnson?Cook model · VUMAT subroutine · Forming limit diagram

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