Delamination Width Effect on Buckling Loads of Simply Supported Woven-Fabric Laminated Composite Plates Made of Carbon/Epoxy

Abstract

The effects of the strip delamination width on the buckling loads of the simply supported carbon/epoxy woven laminated composite plates have been investigated. For this purpose, 3D finite elements models of the square carbon/epoxy laminated plates have been established. Each of these models possesses four layers and different delamination width between second and third layers. Firstly, the harmony between theoretical and finite element solutions results of the plate without delamination has been shown. Then, the buckling loads have been determined for each model and different fiber orientation angles. The results show that important decrease in the buckling loads occur after a certain value of the delamination width. The changing ratios of the results of the symmetric or antisymmetric cases are approximately the same for each angle. For the high values of orientation angles, the values and changing ratios of the buckling loads are also higher than those of the low angles.

Determination of Critical Width of Multiple Delamination in Laminated Composite Plate Under Buckling Load

“…The results obtained from this model with and without contact elements show that the effects of the contact elements on the buckling loads are unimportant and can be ignored. Similar evaluations about the contact elements' effects have been done in some previous studies [15,25].…”

Determination of critical delamination diameter of laminated composite plates under buckling loads

“…They also determined that the influence of the contact elements, used in their finite element models, on buckling loads was very small and could be neglected. Zor [17] investigated the carbon/ epoxy woven-fiber system. In order to examine the effects of the single strip delamination on buckling loads, linear buckling analyses of a square laminated plate have been performed for different fiber angles and simple supported boundary conditions by using 3D finite element method.…”

Effect of flexural stiffness estimates on the buckling load of delaminated composite beams

“…This model was believed to be sufficient to describe the buckling behaviour of the laminated plate and Simitses [1] also considered the effect of delamination growth. Many notable papers on composite beams with single delamination and multiple delaminations appeared later and the type of approach proposed ranged from analytical and finite-element work to experimental work [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

“…The finite-element method is also widely used to investigate the delamination buckling problem, notable publications include Kapania and Wolfe [3], Lee et al [4], Gaudenzi [8], Kyoung et al [11,14], Kim and Hong [6], Hwang and Liu [15], Mehmet Zor [16], and Mehmet Zor et al [17]. Their works include buckling and post-buckling analysis of beams with multiple delaminations, beams with through-the-width delaminations, beams and plates with embedded delaminations, and beams with delamination perpendicular to the mid-plane.…”