An Elastic Interface Model for the Delamination of Bending-Extension Coupled Laminates

Applied Sciences

卷:9

Luca Taglialegne¹  Paolo Fisicaro¹  PaoloS. Valvo¹  Stefano Bennati¹ 

[1] Department of Civil and Industrial Engineering, University of Pisa, Largo Lucio Lazzarino, I-56122 Pisa, Italy;

关键词: fiber-reinforced composite laminate;    multi-directional laminate;    delamination;    elastic interface;    energy release rate;    mixed-mode fracture;   

DOI  :  10.3390/app9173560

来源: DOAJ

【 摘 要 】

The paper addresses the problem of an interfacial crack in a multi-directional laminated beam with possible bending-extension coupling. A crack-tip element is considered as an assemblage of two sublaminates connected by an elastic-brittle interface of negligible thickness. Each sublaminate is modeled as an extensible, flexible, and shear-deformable laminated beam. The mathematical problem is reduced to a set of two differential equations in the interfacial stresses. Explicit expressions are derived for the internal forces, strain measures, and generalized displacements in the sublaminates. Then, the energy release rate and its Mode I and Mode II contributions are evaluated. As an example, the model is applied to the analysis of the double cantilever beam test with both symmetric and asymmetric laminated specimens.

【 授权许可】

Unknown