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Numerical simulation of Lamb wave propagation in metallic foam sandwich structures: a parametric study

机译：Lamb波在金属泡沫夹层结构中传播的数值模拟：参数研究

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摘要

The propagation of guided Lamb waves in metallic foam sandwich panels is described in this paper and analyzed numerically with a three-dimensional finite element simulation. The influence of geometrical properties of the foam sandwich plates (such as the irregularity of the foam structure, the relative density or the cover plate thickness) on the wave propagation is investigated in a parametric study. Open-cell and closed-cell structures are found to exhibit similar wave propagation behavior. In addition to the finite element model with fully resolved microstructure, a simplified, computationally cheaper model is also considered - there the porous core of the sandwich panel is approximated by a homogenized effective medium. The limitations of this homogenization approach are briefly pointed out.
机译：本文介绍了在金属泡沫夹芯板上的兰姆波的传播，并通过三维有限元模拟对其进行了数值分析。在参数研究中研究了泡沫夹层板的几何特性（例如泡沫结构的不规则性，相对密度或盖板厚度）对波传播的影响。发现开孔和闭孔结构表现出相似的波传播行为。除了具有完全解析的微观结构的有限元模型之外，还考虑了简化的，计算上更便宜的模型-在那里，夹心板的多孔芯被均质化的有效介质近似。简要指出了这种均质化方法的局限性。

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  • 来源
    《Composite Structures》 |2013年第3期|387-400|共14页
  • 作者

    Seyed Mohammad Hossein Hosseini; Abdolreza Kharaghani; Christoph Kirsch; Ulrich Gabbert;

  • 作者单位

    Institute of Mechanics, Department of Numerical Mechanics, Otto-von-Guericke-University Magdeburg, Universitiitsplatz 2, 39016 Magdeburg, Germany;

    Institute of Process Engineering, Department of Thermal Process Engineering, Otto-von-Guericke-University Magdeburg, Universitatsplatz 2, 39016 Magdeburg, Germany;

    Institute of Computational Physics, Zurich University of Applied Sciences, Wildbachstrasse 21, 8401 Winterthur, Switzerland;

    Institute of Mechanics, Department of Numerical Mechanics, Otto-von-Guericke-University Magdeburg, Universitiitsplatz 2, 39016 Magdeburg, Germany;

  • 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

    lamb wave propagation; metallic foam structure; finite element method; parametric study;

    机译：兰姆波传播;金属泡沫结构;有限元法参数研究;

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