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Multiple length/time-scale simulation of localized damage in composite structures using a Mesh Superposition Technique

机译:使用网格叠加技术的复合结构局部损伤的多长度/时标模拟

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A Mesh Superposition Technique (MST) for the progressive transition between differently-discretized subdomains is proposed and implemented in an FE code. The interfaces between these subdomains are replaced by transition regions where the corresponding meshes are superposed. The MST is applied to the multiple length/time-scale analysis of a low-velocity impact of a projectile on a composite plate. Unlike using a sudden discretization-transition approach, the use of the MST eliminates the undesirable stress disturbances at the interface between differently-discretized subdomains and, as a result, it correctly captures the impact-induced damage pattern at a lower computational cost. Finally, the MST is coupled with an implicit/explicit co-simulation technique for a multiple time/length-scale analysis. The results indicate that, if the length-scale transition is performed using the proposed MST instead of a sudden discretization-transition, the CPU time can be nearly halved. (C) 2014 Elsevier Ltd. All rights reserved.
机译:提出了一种网格叠加技术(MST),用于在离散程度不同的子域之间进行逐步过渡,并以FE代码实现。这些子域之间的界面被过渡区域取代,在过渡区域中叠加了相应的网格。 MST适用于弹丸在复合板上的低速撞击的多长度/时标分析。与使用突然离散化过渡方法不同,MST的使用消除了不同离散子域之间的界面处的不良应力干扰,因此,它以较低的计算成本正确地捕获了由碰撞引起的破坏模式。最后,MST与隐式/显式协同仿真技术相结合,可进行多个时间/长度尺度分析。结果表明,如果使用建议的MST而不是突然的离散化转换执行长度刻度转换,则CPU时间几乎可以减少一半。 (C)2014 Elsevier Ltd.保留所有权利。

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