• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>European Journal of Mechanics. A, Solids >A 3D delamination modelling technique based on plate and interface theories for laminated structures
【24h】

A 3D delamination modelling technique based on plate and interface theories for laminated structures

机译：基于板和界面理论的3D分层建模技术

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

In this work a technique for analyzing mixed mode delamination problems in laminated composite plates under general loading conditions is developed. The technique adopts the first-order shear deformable laminated plate theory and the interface methodology, which in turn is based on fracture and contact mechanics. In the thickness direction, an assembly of laminated plate and interfaces models the laminated structure. Delamination may occur along these interfaces, which otherwise perfectly connect the plate models by considering the limit case of interface stiffness coefficients approaching infinity. Lagrange and penalty methods are adopted in order to simulate adhesion and contact effects. Analytical expressions for total energy release rate and its mode components along the delamination front are given in terms of interface variables and of plate stress resultant discontinuities. By means of these expressions the influence of transverse shear on interface fracture analysis is investigated and comparisons with other plate-based delamination models adopted in the literature are established. Numerical results for the energy release rate distributions are given for typical mixed mode delamination problems by implementing the method in a 2D finite element analysis, which utilizes shear deformable plate elements and interface elements. Comparisons with full 3D finite element models show the accuracy and the computational efficiency of the proposed procedure. Some applications are proposed to point out the influence of delamination faces interaction on delamination analysis and the convergence of the mode partition procedure as the delamination front element size decreases, also when oscillatory singularities exist. On the basis of the latter result it transpires that the proposed interface model may represent the physical situation of a very thin adhesive layer.
机译：在这项工作中，开发了一种在一般载荷条件下分析层压复合板中混合模式分层问题的技术。该技术采用一阶剪切可变形叠层板理论和界面方法，而界面方法则基于断裂和接触力学。在厚度方向上，层压板和界面的组合体对层压结构进行建模。沿这些界面可能发生分层，否则考虑界面刚度系数接近无穷大的极限情况，可以完美地连接板模型。采用拉格朗日法和惩罚法来模拟粘附和接触效果。沿分层前沿的总能量释放速率及其模式分量的解析表达式是根据界面变量和板应力导致的不连续性给出的。通过这些表达式，研究了横向剪切对界面断裂分析的影响，并与文献中采用的其他基于板的分层模型进行了比较。通过在二维有限元分析中实施该方法，利用剪切可变形板单元和界面单元，针对典型的混合模式分层问题给出了能量释放速率分布的数值结果。与完整的3D有限元模型进行的比较显示了所提出程序的准确性和计算效率。提出了一些应用以指出分层面相互作用对分层分析的影响以及分层前单元尺寸减小时以及存在振荡奇异点时模式划分过程的收敛性。根据后者的结果可以看出，提出的界面模型可以代表非常薄的粘合剂层的物理状态。

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