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Buckling analysis of variable angle tow, variable thickness panels with transverse shear effects

机译：具有横向剪切效应的变角度拖曳，变厚度板的屈曲分析

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摘要

The manufacture of advanced composite panels with variable fibre angles can lead to laminates with a flat profile on one side and a smooth, curved profile on the other. When modelling these laminates in two-dimensional form the flat plate assumptions may no longer accurately capture the structural behaviour. In this paper the buckling behaviour of laminates with one-dimensional fibre variations and symmetric stacking sequences is investigated. The assumptions of modelling the three-dimensional profile as a flat plate or a cylindrical panel are assessed, taking into account the effects of transverse shear deformation. The governing differential equations are solved in the strong form using the Differential Quadrature method and validated by 2D finite element models. The validity of the two modelling approaches is assessed by comparing the solutions to a 3D finite element model capturing the actual shape of the laminate. It is suggested that the buckling event of these variable angle tow, variable thickness laminates is characterised more accurately by "shell-like" than by "plate-like" behaviour. The idea of investigating the effects of two-dimensional fibre orientations with their associated doubly curved topologies is proposed.
机译：具有可变纤维角度的高级复合板的制造可以导致层压板的一侧具有平坦的轮廓，而另一侧具有光滑的弯曲轮廓。当以二维形式对这些层压板进行建模时，平板的假设可能不再准确地反映出结构行为。本文研究了具有一维纤维变化和对称堆积顺序的层压板的屈曲行为。考虑到横向剪切变形的影响，评估了将三维轮廓建模为平板或圆柱面板的假设。使用微分求积法以强形式求解控制微分方程，并通过二维有限元模型进行了验证。通过将解决方案与捕获层压板实际形状的3D有限元模型进行比较，可以评估这两种建模方法的有效性。建议这些可变角度拖曳，可变厚度的层压板的屈曲事件的特征在于，“壳状”比“板状”行为更准确。提出了研究二维纤维取向及其相关的双弯曲拓扑的影响的​​想法。

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  • 来源
    《Composite Structures》 |2014年第1期|482-493|共12页
  • 作者

    R.M.J. Groh; P.M. Weaver;

  • 作者单位

    Advanced Composites Centre for Innovation and Science. University of Bristol, Queen's Building, University Walk, Bristol BS8 1TR, UK;

    Advanced Composites Centre for Innovation and Science. University of Bristol, Queen's Building, University Walk, Bristol BS8 1TR, 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

    Variable stiffness laminates; Buckling; Transverse shear; Differential quadrature;

    机译：变刚度层压板;屈曲;横向剪切差分正交;

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