A modified GFRP constitutive model and its application in anti-impact characteristics prediction of dual-plate structure

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (3) : 73-80.

ZHANG Meng1, YANG Yang2, ZHANG Yueqing3, LIU Liu2, WANG Hui1

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Abstract

Glass fiber reinforced polymer (GFRP) is a typical anisotropic composite, and has complex mechanical responses under impact load. The existing state equation of GFRP material model used in the software Autodyn only considers the single effect of volume strain, and ignores the coupling effect between stress components and strain ones in anisotropic material. Here, firstly, based on the existing decoupling theory, state equation and reinforcement model of GFRP material model were modified, and the modified model’s material parameters were obtained with calculations. Secondly, based on comparative analysis of projectile residual velocity, debris cloud morphology and plastic wave propagation, advantages of the modified model in calculation accuracy and describing GFRP impact failure mechanism were verified. Finally, based on the modified model, the failure mode and anti-impact characteristics of GFRP-Al dual-plate protective structure under actions of different projectiles and different impact velocities were simulated and analyzed.

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glass fiber reinforced polymer (GFRP) / anisotropic material / coupling effect / anti-impact characteristics

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ZHANG Meng1, YANG Yang2, ZHANG Yueqing3, LIU Liu2, WANG Hui1. A modified GFRP constitutive model and its application in anti-impact characteristics prediction of dual-plate structure[J]. Journal of Vibration and Shock, 2021, 40(3): 73-80

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