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From:
Haitao Han, Zixing Lu, Jordan Zheng Zhang, and Junhong Guo, “Delamination analysis of composite laminates using an advanced beam theory”, Mechanics of Advanced Materials and Structures, Vol. 20, No. 2, 2013
ABSTRACT: Taking the longitudinal deformation into consideration, a two-dimensional beam theory is proposed, and a new layered beam model is established subsequently for composite laminates with multiple through-the-width delaminations. The undelaminated portion is regarded as separate beams along the layer interfaces, and the interface continuities are satisfied using the generalized variational principle. Comparisons of the present analytical solutions with three-dimensional finite element results and classical beam model solutions are made to verify the accuracy and efficiency of the present model. The effects of the geometrical parameters of the delamination on the deflection and the energy release rate are discussed.
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