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Structure mechanical modeling of thin-walled closed-section composite beams, Part 1: Single-cell cross section

机译：薄壁封闭截面组合梁的结构力学建模，第1部分：单单元截面

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摘要

An improved structure mechanical modeling with excellent accuracy is developed for single-cell thin-walled closed-section composite beams based on previous work. Both axial warping effect and the effect of material anisotropies on the shell wall mid-surface shear strain are considered. The shear strain is calculated directly from the general constitutive law of the shell wall. Closed form expressions are obtained of one-dimensional global beam stiffness matrix. Numerical comparisons with ABAQUS simulations are performed for box and cylindrical beams with a variety of lamina layups under various loading conditions and excellent agreements are observed. The effect of material anisotropies on the shell wall mid-surface shear strain has significant influence on the accuracy of modeling. In contrast, the axial warping effect has a neelieible influence in cases considered. Significant deficiency of some existing models is revealed.
机译：基于先前的工作，为单单元薄壁封闭截面复合梁开发了一种具有卓越精度的改进结构力学模型。考虑了轴向翘曲效应和材料各向异性对壳壁中表面剪切应变的影响。剪切应变是直接根据壳壁的本构定律计算的。获得一维整体梁刚度矩阵的闭合形式表达式。在各种载荷条件下，对具有各种层板叠合的箱形和圆柱梁进行了ABAQUS仿真的数值比较，并观察到了很好的一致性。材料各向异性对壳壁中表面剪切应变的影响对建模精度有重要影响。相反，在所考虑的情况下，轴向翘曲效应具有微不足道的影响。揭示了一些现有模型的显着不足。

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  • 来源
    《Composite Structures》 |2014年第7期|12-22|共11页
  • 作者

    C. Zhang; S.Wang;

  • 作者单位

    Department of Aeronutical and Automotive Enigneering, Loughborough University, Loughborough, Leicestershire LE11 3TU, UK;

    Department of Aeronutical and Automotive Enigneering, Loughborough University, Loughborough, Leicestershire LE11 3TU, UK;

  • 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

    Closed-section; Composite beams; Single-cell; Thin-walled;

    机译：封闭截面复合梁;单细胞;薄壁;

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