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首页> 外文期刊>Journal of Computational Physics >A friction interface model for multi-material interactions in a Eulerian framework
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A friction interface model for multi-material interactions in a Eulerian framework

机译：欧拉框架中多重交互的摩擦界面模型

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摘要

A friction model for hyper-elastic solid materials was proposed for the simulation of complex shear impacts in a Eulerian framework. The interfacial status of multi-material interactions was obtained in Harten, Lax, and van Leer discontinuity (HLLD) Riemann solver. The inverse deformation gradient tensor was utilized in governing equations to describe the shape change of hyper-elastic solid materials. The level set method (LSM) was used to identify multiple materials in computational domain and the interface boundary condition was applied using the real ghost fluid method (RGFM). A uniform eigensystem of hyperbolic equations was derived using the fifth-order characteristic-wise weighted essentially non-oscillatory (WENO) scheme. Six numerical tests of one-dimensional problems were used to illustrate the robustness of the 5th order WENO scheme. The proposed friction model was evaluated for impact cases in both one and two dimensions with three-dimensional components. The redistribution of strain and kinetic energy during solid-solid interactions was represented using the proposed friction model, while both 'slip' and 'stick' interface showed unphysical approximations. We believe that the friction interface model completes the theory of multi-material interaction and provide a more appropriate way to model the complex dynamic behavior in Eulerian framework for solid materials. (C) 2020 Elsevier Inc. All rights reserved.
机译：提出了一种超弹性固体材料摩擦模型，用于在欧拉框架内模拟复杂的剪切冲击。在Harten、Lax和van Leer不连续性（HLLD）Riemann求解器中获得了多材料相互作用的界面状态。控制方程中采用了逆变形梯度张量来描述超弹性固体材料的形状变化。采用水平集方法（LSM）在计算域内识别多种材料，界面边界条件采用真实鬼流体方法（RGFM）。采用五阶特征加权基本无振荡（WENO）格式，导出了双曲型方程的统一特征方程组。用六个一维问题的数值试验来说明五阶WENO格式的鲁棒性。对提出的摩擦模型进行了一维和二维冲击情况下的三维组件评估。在固-固相互作用过程中，应变和动能的重新分布用所提出的摩擦模型表示，而“滑移”和“粘滞”界面都显示出非物理近似。我们认为，摩擦界面模型完善了多材料相互作用理论，为在欧拉框架下模拟固体材料的复杂动力学行为提供了更合适的方法。（C） 2020爱思唯尔公司版权所有。

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