一种修正的GFRP本构模型及其双层板结构抗冲击特性预测

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摘要玻璃纤维增强聚合物基材料(GFRP)是一种典型的各向异性复合材料，在冲击载荷作用下具有复杂的力学响应。Autodyn软件中现有的GFRP材料模型所采用的状态方程仅考虑了体应变的单一影响，忽略了各向异性材料中应力分量与应变分量之间的耦合效应。首先，在已有的解耦理论基础上，对现有模型中的状态方程和强化模型进行了修正，计算得出了修正模型的材料参数。其次，基于弹丸剩余速度、碎片云形貌和塑性波传播三方面对比分析，验证了修正模型在计算精度和对GFRP冲击破坏机理描述等方面的优越性。最后，基于修正模型对GFRP-Al双层防护结构在不同弹丸和不同冲击速度撞击作用下的破坏模式及抗冲击特性进行了仿真计算和规律性分析。

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	张萌1
	杨扬2
	张岳青3
	柳柳2
	王慧1

关键词 ： GFRP, 各向异性材料, 耦合效应, 抗冲击特性

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.

Key words： glass fiber reinforced polymer (GFRP) anisotropic material coupling effect anti-impact characteristics

收稿日期: 2019-12-18 出版日期: 2021-02-15

引用本文:

张萌1，杨扬2，张岳青3，柳柳2，王慧1. 一种修正的GFRP本构模型及其双层板结构抗冲击特性预测[J]. 振动与冲击, 2021, 40(3): 73-80.
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. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(3): 73-80.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2021/V40/I3/73

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