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Generalized viscoelastic model for laminated beams using hierarchical finite elements

机译:分层有限元的层合梁广义粘弹性模型。

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摘要

The formulation of an enriched hierarchical one-dimensional finite element suitable to analyze the rheological behavior of thick arbitrarily laminated beams is presented. The formulation is based on the Equivalent Single Layer (ESL) theory and was developed to allow the use of any high-order beam shear deformation theory (HBST) in a unified approach. A generalized Maxwell model was implemented to analyze the time-dependent behavior of the composite. The finite element employs local Lagrange and Hermitian support functions enriched with orthogonal Gram-Schmidt polynomials and is free of shear locking. The enriched macro elements can be used with very coarse meshes and the precision can be controlled without generating a new mesh. The formulation has been validated with numerical examples of symmetric and non-symmetric laminated beams using the three-dimensional finite element program PLCD.
机译:提出了一种适合于分析厚的任意层合梁的流变行为的富集的分层一维有限元的公式。该公式基于等效单层(ESL)理论,并被开发为允许在统一方法中使用任何高阶梁剪切变形理论(HBST)。实施了广义麦克斯韦模型来分析复合材料随时间变化的行为。有限元采用局部Lagrange和Hermitian支持函数,该函数丰富了正交Gram-Schmidt多项式,并且没有剪切锁定。丰富的宏元素可以与非常粗糙的网格一起使用,并且可以控制精度而无需生成新的网格。使用三维有限元程序PLCD,通过对称和非对称层合梁的数值示例验证了该公式。

著录项

  • 来源
    《Composite Structures》 |2020年第3期|111794.1-111794.11|共11页
  • 作者

  • 作者单位

    Natl Univ Salta Engn Fac INIQUI CONICET ICMASa Avda Bolivia 5150 RA-4400 Salta Argentina;

    Natl Univ Salta Engn Fac INIQUI CONICET ICMASa Avda Bolivia 5150 RA-4400 Salta Argentina|Tech Univ Catalonia Barcelona Tech CIMNE Int Ctr Numer Method Engn UPC Edif C1 Campus Nord Jordi Girona 1-3 Barcelona 08034 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

    Viscoelastic model; Laminated beams; Higher order theory; Hierarchical finite element;

    机译:粘弹性模型层压梁高阶理论;层次有限元;

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