• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Composite Structures >Investigation of failure initiation in curved composite laminates using a higher-order beam model
【24h】

Investigation of failure initiation in curved composite laminates using a higher-order beam model

机译：使用高阶梁模型研究弯曲复合材料层压板的破坏起因

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Curved laminates are prone to delamination failure from applied bending moments that straighten out the laminate and induce tensile stresses in the unreinforced radial direction. These non-classical through-thickness stresses are important even for thinner configurations and need to be accounted for in the design of lightweight composite structures, preferably in a computationally efficient manner. Here, we investigate failure-inducing critical stresses for a number of curved laminates using a higher order beam model derived from the Bellinger Reissner mixed variational principle, which guarantees that the hoop, interlaminar shear and radial stresses are equilibrated. By solving the governing equations of the theory in the strong form using the pseudo-spectral differential quadrature method, the model is capable of predicting accurate 3D stress fields in curved laminates, even in the vicinity of localised features such as supported edges. The model is used alongside commonly used failure criteria to reproduce experimental failure initiation results found in the literature, and the comparison suggests that failure mode, location and load are all predicted accurately. Finally, failure maps that highlight the critical stress component for failure initiation are constructed. As the thickness of the curved laminate increases, the critical stress component transitions from intralaminar hoop stress to interlaminar shear or radial stress depending on the specific laminate configuration. These findings and failure maps collectively provide insights into the mechanics of failure initiation that should also prove useful for design purposes. (C) 2017 Elsevier Ltd. All rights reserved.
机译：弯曲的层压板很容易因施加的弯矩而脱层失败，这些弯矩使层压板变直并在未增强的径向方向上产生拉应力。这些非经典的贯穿厚度应力即使对于较薄的配置也很重要，并且在设计轻型复合结构时必须考虑在内，最好以计算有效的方式加以考虑。在这里，我们使用源自Bellinger Reissner混合变分原理的高阶梁模型研究了许多弯曲层压板的失效诱导临界应力，该模型可以确保环向应力，层间剪切应力和径向应力达到平衡。通过使用伪光谱差分正交方法以强形式求解该理论的控制方程，该模型即使在局部特征（如支撑的边缘）附近也能够预测弯曲层压板中的准确3D应力场。该模型与常用的故障准则一起使用，可以重现文献中发现的实验性故障初始结果，并且比较结果表明，故障模式，位置和载荷都可以准确预测。最后，构建了突出显示故障引发关键应力分量的故障图。随着弯曲层压板厚度的增加，取决于特定的层压板构造，临界应力分量从层内环向应力转变为层间剪切或径向应力。这些发现和故障图共同提供了对故障引发机制的见解，这些见解对于设计目的也应被证明是有用的。 （C）2017 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Composite Structures》 |2017年第5期|143-152|共10页
  • 作者

    Thurnherr C.; Groh R. M. J.; Ermanni P.; Weaver P. M.;

  • 作者单位

    ETH, Dept Mech & Proc Engn, Lab Composite Mat & Adapt Struct, Tannenstr 3, CH-8092 Zurich, Switzerland;

    Univ Bristol, Adv Composites Ctr Innovat & Sci, Queens Bldg,Univ Walk, Bristol BS8 1TR, Avon, England;

    ETH, Dept Mech & Proc Engn, Lab Composite Mat & Adapt Struct, Tannenstr 3, CH-8092 Zurich, Switzerland;

    Univ Bristol, Adv Composites Ctr Innovat & Sci, Queens Bldg,Univ Walk, Bristol BS8 1TR, Avon, England;

  • 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

    Curved laminates; Higher-order modeling; Interlaminar stresses; Anisotropic materials; Damage onset;

    机译：弯曲层压板;高阶建模;层间应力;各向异性材料;损伤开始;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号