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A novel characteristic curve for failure prediction of multi-bolt composite joints

机译：新型多螺栓复合材料节点失效预测的特征曲线

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摘要

A novel characteristic curve determined by tensile, compressive and shear-out characteristic length is presented to predict failure load and failure mode of mechanically fastened composite joints. In contrast to the existing curves, the novel one introduces a shear-out characteristic length and provides capability to predict shear-out failure. A mathematics formulation of the novel curve is proposed based on the expression of Chang's characteristic curve and shear-out characteristic length. A series of tests were carried out and nonlinear finite element analyses were conducted to obtain the tensile, compressive and shear-out characteristic lengths for the novel curve. Following tensile tests of two-bolt and three-bolt joints were performed, and the failure loads and modes were numerically predicted by the characteristic curve method with the novel curve and Chang's. The numerical results obtained from the curve presented show good agreements with the experimental outcomes and better accuracy on both failure load and failure mode.
机译：提出了由拉伸，压缩和剪切特征长度确定的新型特征曲线，以预测机械固定复合材料接头的破坏载荷和破坏模式。与现有曲线相反，新颖的曲线引入了剪切特征长度并提供了预测剪切失败的能力。基于Chang特征曲线的表达和剪切特征长度，提出了新型曲线的数学公式。进行了一系列测试，并进行了非线性有限元分析，以获得新颖曲线的拉伸，压缩和剪切特征长度。随后进行了两螺栓和三螺栓接头的拉伸试验，并通过特征曲线法和新颖曲线及Chang's数值预测了失效载荷和破坏模式。从给出的曲线获得的数值结果与实验结果显示出良好的一致性，并且在失效载荷和失效模式上都具有更好的精度。

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  • 来源
    《Composite Structures》 |2014年第2期|129-136|共8页
  • 作者

    Jianyu Zhang; Fengrui Liu; Libin Zhao; Binjun Fei;

  • 作者单位

    Institute of Solid Mechanics, Beihang University, Beijing 100191, PR China;

    Institute of Solid Mechanics, Beihang University, Beijing 100191, PR China;

    School of Astronautics, Beihang University, Beijing 100191, PR China;

    Institute of Solid Mechanics, Beihang University, Beijing 100191, PR China;

  • 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

    Bolted joints; Mechanical behavior; Finite element analysis (FEA);

    机译：螺栓连接;机械性能;有限元分析（FEA）;

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