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A new finite element approach applied to the free edge effect on composite materials

机译：一种新的有限元方法应用于复合材料的自由边缘效应

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摘要

A general theory of elasticity-based finite element formulation applied to the free edge effect is described in this paper. The F.E. error estimation is also addressed. Optimum mesh criteria based on the even distribution of global and specific error are shown. This technique has been applied to a [±25°/90°]_s T300/ 934 laminate. Four different numerical models have been compared in terms of through-thickness tensile and shear interlaminar stresses, with varying degrees of complexity and yielding various degrees of error. As a result of this study, a reliable numerical model with a low level of error has been obtained. Finally, a theory-experiment correlation study has been carried out over a (+45°, -45°, 0°)_s laminate loaded in tension. Both, strain-to-failure and failure mode were successfully correlated.
机译：本文介绍了一种基于弹性的有限元公式化的一般理论，适用于自由边缘效应。还解决了F.E.误差估计。显示了基于全局误差和特定误差的均匀分布的最佳网格标准。此技术已应用于[±25°/ 90°] _s T300 / 934层压板。在整个厚度拉伸和剪切层间应力方面，已经比较了四个不同的数值模型，它们具有不同程度的复杂性并产生不同程度的误差。这项研究的结果是，获得了具有低误差水平的可靠数值模型。最终，在（+ 45°，-45°，0°）s承受张力的层压板上进行了理论与实验的相关性研究。应变失效模式和失效模式均已成功关联。

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  • 来源
    《Composite Structures》 |2013年第4期|121-129|共9页
  • 作者

    R. Esquej; L Castejon; M. Lizaranzu; M. Carrera; A. Miravete; R. Miralbes;

  • 作者单位

    P3 Voith Aerospace S.L.U., Avda. Cordoba, 21, 3°, 28026 Madrid, Spain;

    Department of Mechanical Engineering, University of Zaragoza, c/Maria de Luna s, 50018 Zaragoza, Spain;

    Instituto Tecnologico de Aragon, Laboratorio de Materiales, c/Maria de Luna 8, 50018 Zaragoza, Spain;

    Department of Mechanical Engineering, University of Zaragoza, c/Maria de Luna s, 50018 Zaragoza, Spain;

    Department of Mechanical Engineering, University of Zaragoza, c/Maria de Luna s, 50018 Zaragoza, Spain;

    Department of Mechanical Engineering, University of Zaragoza, c/Maria de Luna s, 50018 Zaragoza, Spain;

  • 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

    free edge; composite materials; finite element method; optimum numerical model;

    机译：自由边缘复合材料;有限元法最佳数值模型;

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