晶体塑性有限元分析开孔对多晶板材力学性能的影响

doi:10.12066/j.issn.1007-2861.2159

Abstract

Abstract:

Based on the secondary development platform of ABAQUS subroutine VUMAT, the dislocation evolution and twinning mechanism have been incorporated into the crystal plastic finite element method (CPFEM), which is used to investigate the mechanical behavior of polycrystalline plastic materials. The validity of the secondary development program is verified by comparing the experimental and simulation results. The CPFEM with its twinning effect simulates and analyzes the effect of holes on the mechanical properties of the plate. Furthermore, linear approximation can be used safely when the aperture is less than half of the plate width; however, it is not suitable for larger apertures. When the spacing between two hole openings is small, their positional arrangement has a significant impact on the toughness and ultimate stress of the plate; this impact can be divided into three modes: weak influence zone, strong influence zone, and transition zone. For the plate with double holes subjected to a tensile load, an arrangement along the axis is the most optimum.

Key words: crystal plastic finite element method, porous plate, dislocation evolution, twinning mechanism

CLC Number:

TG302

HU Xiaoyu, DU Yapeng, CHU Haijian. Effect of hole opening on mechanical properties of polycrystalline plate based on crystal plastic finite element[J]. Journal of Shanghai University（Natural Science Edition）, 2021, 27(3): 583-593.

Figures/Tables 8

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References 30

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Effect of hole opening on mechanical properties of polycrystalline plate based on crystal plastic finite element

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