开圆孔波纹夹层板单向拉伸状态的应力极值优化求解

Stress extreme value optimization solution for infinitely corrugated core sandwich panel with circular opening under uniaxial tension

  • 摘要:
    目的 旨在研究开圆孔无限波纹夹层板单向拉伸状态的应力分布,寻求最不利开孔位置。
    方法 采用ANSYS软件子模型方法计算不同开孔位置的应力分布,并用ANSYS软件提供的零阶优化设计方法寻求最大应力集中系数时的开孔位置。
    结果 开孔附近的应力分布与网格划分密切相关,最大应力总是出现在芯层板上。开圆孔无限波纹夹层板单向拉伸状态的应力集中系数普遍大于3,最大可达4.104。
    结论 先整体模型再子模型的应力极值优化分析过程既可以节省计算时间,又可得到较高计算精度,提高优化效率。

     

    Abstract:
    Objective In order to study the stress distribution of circular holed infinite corrugated core sandwich panels under uniaxial tension and seek the most unfavorable opening position,
    Method both submodel analysis method and subproblem optimization method were employed just for calculation stress distribution of different holing positions and seeking the holing position where the hole edge stress concentration factor reached the maximum, respectively.
    Result The stress distribution near the opening is closely related to the mesh division, and the maximum stress always occurs on the core layer board. The stress concentration factor of an infinitely corrugated sandwich panel with a circular opening under uniaxial tension is generally greater than 3, with a maximum of 4.104.
    Conclusion  Undergoing the stress extreme value optimization analysis process of the overall model before the submodel can save computation time, achieve high computational accuracy, and improve optimization efficiency.

     

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