Bilinear approximations to the mode II delamination cohesive law using an inverse method

被引：40

作者：

Dourado, N. ^{[2
]}

de Moura, M. F. S. F. ^{[1
]}

de Morais, A. B. ^{[3
]}

Pereira, A. B. ^{[3
]}

机构：

[1] Univ Porto, Fac Engn, Dept Mech Engn, P-4200465 Oporto, Portugal

[2] Univ Tras Os Montes & Alto Douro, Dept Engn, P-5001911 Vila Real, Portugal

[3] Univ Aveiro, Dept Mech Engn, P-3810193 Aveiro, Portugal

来源：

MECHANICS OF MATERIALS | 2012年 / 49卷

关键词：

Delamination; Mode II; Cohesive law; Inverse method; INTERLAMINAR FRACTURE; COMPOSITES; TOUGHNESS;

D O I：

10.1016/j.mechmat.2012.02.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cohesive zone modelling has proved to be a powerful tool to model delamination problems in high performance composites. Application to mode II delamination is of particular interest due to the large fracture process zone. In this paper, bilinear approximations to the mode II delamination cohesive law were determined for two carbon/epoxy composites. This was achieved by an inverse method that consisted of making Finite Element Analyses fit experimental load-displacement curves measured in well-known End-Notched Flexure tests. The optimal parameters of the bilinear cohesive law were determined by a genetic algorithm. The results showed the adequacy of the bilinear cohesive law and of the methodology employed. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：42 / 50

页数：9

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