Numerical Simulation Study on the Ballistic Resistance of 6061-T651 Aluminum Alloy Plates Based on Different Fracture Criterion

doi:10.3901/JME.2023.14.138

Abstract

Abstract: The finite element models of projectiles impacting target plates have been established using the ABAQUS/Explicit software, and the numerical simulation calculations are carried out by using different fracture criteria. Failure mechanisms of plates under the impact of projectiles with different nose shapes and the influence of fracture criteria on the numerical simulation results are revealed by analyzing the stress state of the failure elements. It is found that the predicted results of WMJC fracture criterion considering the effect of Lode angle are more consistent with the experimental results, compared with the MJC fracture criterion. With the increase of caliber-radius-head of projectile, the proportion of tensile fracture in the failure elements of the target plate gradually increases, which reduces the influence of Lode angle on the ballistic limit predicted by numerical simulation. Moreover, the effect mechanism of fracture criterion on the failure mode is different when the target plate is struck by projectiles with different nose shapes.

Key words: numerical simulation optimization, projectile nose shape, failure mechanism, fracture criterion, stress state

CLC Number:

TG156

DENG Yunfei, WU Huapeng, YANG Xiaoyue, WANG Xuan. Numerical Simulation Study on the Ballistic Resistance of 6061-T651 Aluminum Alloy Plates Based on Different Fracture Criterion[J]. Journal of Mechanical Engineering, 2023, 59(14): 138-150.

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