Omni first-ply-failure envelopes — A conservative approach to assess laminate failure

IF 5.3 Q2 MATERIALS SCIENCE, COMPOSITES Composites Part C Open Access Pub Date : 2024-04-22 DOI:10.1016/j.jcomc.2024.100460
Erik Kappel
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Abstract

Omni first-ply-failure (FPF) envelopes are an elegant yet conservative approach to assess composite laminate failure on a global level. Omni envelopes can be found increasingly in recent publications. However, the development process of those envelopes shows a lack of clarity. At some point the illustration switches from a laminate-strain basis (ɛx,ɛy,γxy) to the particular case of laminate principal-strain (ɛI,ɛII) basis. The latter is elegant, as the principal-strain space can be easily plotted in 2D. This article presents two procedures to directly determine omni FPF envelopes and it clarifies the transfer to principal strains.

While the Tsai–Wu criterion is used in almost all available publications, the present article uses Cuntze’s failure mode concept (FMC). The article provides a simple example case, which demonstrates the application of omni envelopes in context of FEA based CFRP design.

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全方位首层失效包络线--评估层压板失效的保守方法
全方位首层失效(FPF)包络线是一种优雅而保守的方法,用于评估复合材料层压板的整体失效情况。全方位包络线在最近的出版物中越来越多。然而,这些包络线的开发过程并不清晰。在某些时候,说明会从层压应变基础(ɛx,ɛy,γxy)切换到层压主应变基础(ɛI,ɛII)的特殊情况。后者非常优雅,因为主应变空间可以轻松绘制成二维图。本文介绍了直接确定全向 FPF 包络的两种程序,并阐明了向主应变的转移。几乎所有现有出版物都使用蔡武准则,而本文则使用 Cuntze 的失效模式概念 (FMC)。文章提供了一个简单的案例,展示了全向包络在基于有限元分析的 CFRP 设计中的应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Composites Part C Open Access
Composites Part C Open Access Engineering-Mechanical Engineering
CiteScore
8.60
自引率
2.40%
发文量
96
审稿时长
55 days
期刊最新文献
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