A simplified layered beam approach for predicting ply drop delamination in thick composite laminates
A simplified layered beam approach for predicting ply drop delamination in thick composite laminates
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DOI：
10.1016/j.matdes.2016.06.105
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发表时间：
2016-10-15
影响因子：
8.4
通讯作者：
Hallett, Stephen R.
中科院分区：
文献类型：
--
作者：
Gan, Khong Wui;Allegri, Giuliano;Hallett, Stephen R.
分层发作的预测是设计厚锥形复合层压板的一项艰巨任务，其中存在多个层终端（“下降”）。本文介绍了针对锥形层压板的全球局部基于局部元素设计方法的开发，从而使用分层的timoshenko光束模型来预测各个下降的分层启动。这种建模策略提供了一种快速，保守的方法，用于评估锥形复合层压板的强度。提出了参数测试案例，以验证方法论并了解其局限性。最后，证明了该工具将工具应用于相对较厚的锥形复合测试试样，该试样包括多个ply滴。 （c）2016年作者。由Elsevier Ltd.出版。
The prediction of delamination onset is a challenging task in the design of thick tapered composite laminates, where multiple ply terminations ("drop-offs") are present. This paper addresses the development of a global local finite element-based design approach for tapered laminates, whereby layered Timoshenko beam models are employed to predict delamination initiation from individual drop-offs. This modelling strategy provides a fast and conservative method for evaluating the strength of tapered composite laminates. Parametric test cases are presented in order to validate the methodology and understand its limitations. Finally, the application of the tool to a relatively thick tapered composite test specimen comprising multiple ply-drops is demonstrated. (C) 2016 The Authors. Published by Elsevier Ltd.