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Free-edge and ply cracking effect in angle-ply laminated composites subjected to in-plane loads

Zhang, Daxu and Ye, Jianqiao and Lam, Dennis (2007) Free-edge and ply cracking effect in angle-ply laminated composites subjected to in-plane loads. Journal of Engineering Mechanics, 133 (12). pp. 1268-1277. ISSN 0733-9399

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This paper presents a semianalytical method for the prediction of interlaminar stresses and displacements near the free edges and ply cracks in general angle-ply laminates subjected to biaxial extensions and/or in plane shear deformation. The method is based on a state space representation of the three-dimensional equations of elasticity. Numerical solutions are obtained by using layer refinement in the through thickness direction and Fourier series expansion in the other directions. By this approach, an angle-ply laminate may be composed of an arbitrary number of monoclinic layers and each layer may have different material property and thickness. This method guarantees continuous fields of all interlaminar stresses across interfaces between material layers. Numerical results are compared with those obtained from other methods. It is found that the theory provides a satisfactory approximation to the stress singularities near the free edges and ply cracks. Numerical solutions for antisymmetric laminates under extension and general laminates under shearing are new in the literature and can be used as benchmarks for validating new models.

Item Type: Journal Article
Journal or Publication Title: Journal of Engineering Mechanics
Subjects: ?? ta ??
Departments: Faculty of Science and Technology > Engineering
ID Code: 54229
Deposited By: ep_importer_pure
Deposited On: 17 May 2012 11:03
Refereed?: Yes
Published?: Published
Last Modified: 11 Apr 2018 00:28
Identification Number:

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