...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Sciences >Evaluation of Interlaminar Stresses in Composite Laminates with a Bolt-Filled Hole Using a Linear Elastic Traction-Separation Description
【24h】

Evaluation of Interlaminar Stresses in Composite Laminates with a Bolt-Filled Hole Using a Linear Elastic Traction-Separation Description

机译：使用线性弹性牵引-分离描述评估带有螺栓填充孔的复合材料层合板的层间应力

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Determination of the local interlaminar stress distribution in a laminate with a bolt-filled hole is helpful for optimal bolted joint design, due to the three-dimensional (3D) nature of the stress field near the bolt hole. A new interlaminar stress distribution phenomenon induced by the bolt-head and clamp-up load, which occurs in a filled-hole composite laminate, is investigated. In order to efficiently evaluate interlaminar stresses under the complex boundary condition, a calculation strategy that using zero-thickness cohesive interface element is presented and validated. The interface element is based on a linear elastic traction-separation description. It is found that the interlaminar stress concentrations occur at the hole edge, as well as the interior of the laminate near the periphery of the bolt head. In addition, the interlaminar stresses near the periphery of the bolt head increased with an increase in the clamp-up load, and the interlaminar normal and shear stresses are not at the same circular position. Therefore, the clamp-up load cannot improve the interlaminar stress distribution in the laminate near the periphery of the bolt head, although it can reduce the magnitude of the interlaminar shear stress at the hole edge. Thus, the interlaminar stress distribution phenomena may lead to delamination initiation in the laminate near the periphery of the bolt head, and should be considered in composite bolted joint design.
机译：由于螺栓孔附近的应力场具有三维（3D）特性，因此确定具有螺栓孔的层压板中的局部层间应力分布有助于优化螺栓连接设计。研究了由螺栓头和夹紧载荷引起的新的层间应力分布现象，这种现象发生在填充孔的复合材料层合板中。为了有效地评估复杂边界条件下的层间应力，提出并验证了采用零厚度内聚界面元的计算策略。接口元素基于线性弹性牵引分离描述。发现层间应力集中发生在孔边缘以及靠近螺栓头外围的层压板内部。另外，螺栓头周围附近的层间应力随着夹紧载荷的增加而增加，并且层间法向应力和剪切应力不在相同的圆形位置。因此，夹紧载荷虽然可以减小孔边缘处的层间剪切应力的大小，但是不能改善在螺栓头的周缘附近的层合体中的层间应力分布。因此，层间应力分布现象可能导致在螺栓头周边附近的层压板中引发分层，因此应在复合螺栓连接设计中予以考虑。

著录项

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