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The effect of a spew fillet on adhesive stress distributions in laminated composite single-lap joints

机译：倒角对层压复合单搭接接头粘结应力分布的影响

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摘要

A laminated composite single-lap joint without a spew fillet, subjected to tensile loading, is investigated experimentally and numerically. By directly comparing the experimentally- and numerically-determined deformations of the single-lap joints with and without a fillet, the effect of a spew fillet on adhesive stress distributions is discussed. Moire interferometry is used to measure the in-plane surface deformation of the overlap region of the test specimens. The deformation interactions of the laminated adherends, adhesive layer and a fillet are documented in the form of orthogonal components of the displacement fields (u and v). Two-dimensional, geometrically linear and nonlinear finite element analyses are performed to simulate the mechanical response of the laminated composite single-lap joint and the effect of a spew fillet. Experimental and numerical results indicate that the adhesive shear and peel strain (stress) concentrations can be reduced greatly by introducing a fillet at the end of the overlap, and these concentrations are affected by the geometrically nonlinear deformation of the single-lap joint.
机译：实验和数值研究了无拉长角的层压复合单搭接接头。通过直接比较用和不用圆角的单搭接接头的实验和数值确定的变形，讨论了圆角圆角对粘着应力分布的影响。莫尔干涉仪用于测量试样重叠区域的平面内表面变形。层压的被粘物，粘合剂层和圆角的变形相互作用以位移场（u和v）的正交分量的形式记录。进行了二维，几何线性和非线性有限元分析，以模拟层压复合单搭接接头的机械响应以及喷口的效果。实验和数值结果表明，通过在重叠的末端引入圆角，可以大大降低粘合剂的剪切和剥离应变（应力）浓度，并且这些浓度受单膝关节几何非线性变形的影响。

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  • 来源
    《Composite Structures》 |1995年第4期|p.123-131|共9页
  • 作者

    M.Y.Tsai; J. Morton;

  • 作者单位

    Department of Engineering Science and Mechanics, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0219, USA;

  • 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 工程材料学;
  • 关键词

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