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A unified analysis of stiffener reinforced composite beams with arbitrary cross-section.

机译：任意截面加劲肋加筋组合梁的统一分析。

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摘要

A number of methods are available to analyze the laminated composite beams using smear property of laminate stiffness ignoring unsymmetrical behavior of laminates. Some include their effect of laminate but did not include the unsymmetrical effect of the cross-section of the beam. On the other hand, using finite element method to analyze the beam is dependent on the structural configurations including the laminate lay-up sequence.;An analytical method was developed from lamination theory in order to study the structural response of composite laminated beams. The present method is capable of predicting the axial and bending stiffnesses, the centroid location, and the stresses in each ply of the whole structure. The results were compared with finite element methods.;Laminated beams studied in this research include the beams with a rectangular cross-section bonded with a stiffener. The stiffener placed in both aligned and non-aligned position with respect to the centerline of the beam is considered.;Thin-walled beams with circular and airfoil sections are also studied. A parametrization method to define the median of the cross-section is developed. Then the stress analysis is conducted.;For two laminates aligned bonded together top and bottom, the present method results agree very well with the finite element results for all the cases less the unsymmetrical case. For the non-aligned case, all the results agree. On the other hand, the results also are close to each other for the laminates bonded side by side less the un-balanced case. Finally, for the circular and airfoil cross-sections the results agree with the finite element results.
机译：可以使用许多方法来使用层压板刚度的涂抹特性来分析层压复合梁，而忽略层压板的不对称行为。有些包括其层压效果，但不包括横梁横截面的非对称效果。另一方面，采用有限元方法来分析梁的结构取决于包括层合顺序在内的结构形态。；从层合理论出发，提出了一种分析方法，以研究复合层合梁的结构响应。本方法能够预测整个结构的每个层中的轴向刚度和弯曲刚度，质心位置以及应力。将该结果与有限元方法进行了比较。这项研究中的层合梁包括具有加劲肋的矩形截面梁。考虑了相对于梁中心线处于对准和非对准位置的加劲肋。;还研究了具有圆形截面和翼型截面的薄壁梁。开发了一种定义截面中值的参数化方法。然后进行应力分析。对于两个上下对齐排列的层压板，本方法的结果与有限元结果在所有情况下都非常吻合，不对称情况除外。对于不结盟的案件，所有结果都是一致的。另一方面，并​​排粘合的层压体的结果也接近彼此，不平衡情况更少。最后，对于圆形和翼型横截面，结果与有限元结果一致。

著录项

  • 作者

    Rios, Gianfranco.;

  • 作者单位

    The University of Texas at Arlington.;

  • 授予单位 The University of Texas at Arlington.;
  • 学科 Engineering Mechanical.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 278 p.
  • 总页数 278
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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