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首页> 外文期刊>Composite Structures >An indentation law for doubly curved composite sandwich panels with rigid-plastic core subjected to flat-ended cylindrical indenters
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An indentation law for doubly curved composite sandwich panels with rigid-plastic core subjected to flat-ended cylindrical indenters

机译：具有刚性塑料芯的双弯曲复合夹心板的压痕定律

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摘要

In this paper, an indentation law (force - indentation relation) is derived for a doubly curved composite sandwich panel subjected to a flat-ended cylindrical indenter using the principle of minimum potential energy. The sandwich panel is composed of two laminated facesheets and a rigid-plastic core. The analysis is nonlinear due to nonlinear strain-displacement relations. In contrast to existing analytical models for the indentation of composite sandwich panels, the geometry of the sandwich panel is a doubly curved shell which includes flat, cylindrical and spherical panels as three special cases. Moreover, both bending and membrane effects are simultaneously taken into account for the indented facesheet. Additionally, the stacking sequence of the facesheets is completely arbitrary, so that all the coupling stiffnesses, are also included in the model. The validity of the derived indentation law is confirmed through comparison with the existed experimental and present FEM (finite element method) results. The effects of some important geometrical and mechanical parameters on the derived indentation law are studied and discussed. It is observed that the stacking sequence of the facesheet has a little influence on the indentation response. Furthermore, for the same indentation force, the indentation depth increases with increasing radii of curvature.
机译：在本文中，采用最小势能原理，推导了双曲复合材料夹芯板的压痕定律（力-压痕关系），该复合夹心板受到了平端圆柱形压头的作用。夹心板由两个层压面板和一个硬塑料芯组成。由于非线性应变-位移关系，分析是非线性的。与现有的复合夹层板压痕分析模型相比，夹层板的几何形状是双弯曲的外壳，其中包括平面，圆柱和球形三种特殊情况。而且，对于凹入的面板，同时考虑了弯曲和膜效应。此外，面板的堆叠顺序完全是任意的，因此所有耦合刚度也都包含在模型中。通过与现有的实验结果和有限元方法的结果进行比较，可以确定所得出的压痕定律的有效性。研究和讨论了一些重要的几何和机械参数对导出的压痕定律的影响。观察到面板的堆叠顺序对压痕响应影响很小。此外，对于相同的压入力，压入深度随着曲率半径的增加而增加。

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  • 来源
    《Composite Structures》 |2013年第11期|82-89|共8页
  • 作者

    M. Hosseini; S.M.R. Khalili; K. Malekzadeh Fard;

  • 作者单位

    Centre of Excellence for Research in Advanced Materials and Structures. Faculty of Mechanical Engineering, K.N. Toosi University of Technology, Tehran, Iran;

    Centre of Excellence for Research in Advanced Materials and Structures. Faculty of Mechanical Engineering, K.N. Toosi University of Technology, Tehran, Iran,Faculty of Engineering, Kingston University, London, UK;

    Department of Structural Engineering and Simulation, Space Research Institute, Tehran-Karaj Highway, Tehran, Iran;

  • 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

    Indentation law; Doubly curved panel; Sandwich structures; Rigid-plastic core; Cylindrical indenter;

    机译：压痕法;双曲面面板;三明治结构;硬塑料芯;圆柱压头;

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