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Impact analysis of sandwich composites based on a refined plate element with strain energy updating

机译：基于改进板元和应变能更新的三明治复合材料冲击分析

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摘要

A finite element simulation of impacts on sandwich composites with laminated faces is presented; it is based on a refined multilayered plate model with a high-order zig-zag representation of displacements, which is incorporated through a strain energy updating process. This allows implementation into existing commercial finite elements codes, preserving their program structure. As customary, the Hertzian law and the Newmark implicit time integration scheme are used for solving the contact problem. The contact radius and the force are computed within each time step by an iterative algorithm which forces the impacted top surface to conform, in the least-squares sense, to the shape of the impactor. Nonlinear strains of von Karman type are used. As appearing by the comparison with experimental results, the present model appears able to accurately predict the impact force, the core damage and the damage of face sheets in sandwich composites with foam and or honeycomb core.
机译：提出了对夹层复合材料夹层复合材料的冲击的有限元模拟。它基于具有位移的高阶之字形表示的精制多层板模型，该模型通过应变能更新过程被合并。这允许实现为现有的商业有限元代码，并保留其程序结构。按照惯例，赫兹定律和纽马克隐式时间积分方案用于解决联系问题。接触半径和作用力是在每个时间步长内通过迭代算法计算的，该算法会迫使受影响的顶表面在最小二乘意义上与冲击器的形状保持一致。使用了von Karman类型的非线性应变。通过与实验结果的比较可以看出，本模型似乎能够准确地预测具有泡沫和/或蜂窝芯的夹芯复合材料的冲击力，芯损伤和面板的损伤。

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  • 来源
    《Composite Structures》 |2009年第1期|35-51|共17页
  • 作者

    U. Icardi; L. Ferrero;

  • 作者单位

    Dipartimento di Ingegneria Aeronautica e Spaziale, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy;

    Dipartimento di Ingegneria Aeronautica e Spaziale, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    low velocity impacts; induced damage; FEA; sandwich structures;

    机译：低速冲击;诱发的损害;有限元分析;三明治结构;

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