Cohesive modeling of transverse cracking in laminates under in-plane loading with a single layer of elements per ply

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:50

Article

van der Meer, Frans P.¹  Davila, Carlos G.² 

[1] Delft Univ Technol, Fac Civil Engn & Geosci, NL-2600 GA Delft, Netherlands

[2] NASA, Langley Res Ctr, Hampton, VA 23681 USA

关键词: Composite laminates;    Extended finite element method;    Fracture;    Cohesive zone modeling;    Transverse cracking;    In situ strength;   

DOI  :  10.1016/j.ijsolstr.2013.06.014

来源: Elsevier

【 摘 要 】

This study aims to bridge the gap between classical understanding of transverse cracking in cross-ply laminates and recent computational methods for the modeling of progressive laminate failure. Specifically, the study investigates under what conditions a finite element model with cohesive X-FEM cracks can reproduce the in situ effect for the ply strength. It is shown that it is possible to do so with a single element across the thickness of the ply, provided that the interface stiffness is properly selected. The optimal value for this interface stiffness is derived with an analytical shear lag model. It is also shown that, when the appropriate statistical variation of properties has been applied, models with a single element through the thickness of a ply can predict the density of transverse matrix cracks. (C) 2013 Elsevier Ltd. All rights reserved.

【 授权许可】

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