Approximate Analysis of the Buckling Behavior of Composites with Delamination

Abstract

In this paper, we provide an insight into the governing mechanism of the uni-axial compressive bucklingof a delaminated composite. We propose an approximate method to analyze the bucklingbehavior as the first step to further investigate the effect of contact zone at the ends of a delamination. The agreement of the analytical results with experiments in critical values of relative axial displacement verifies our model and approach. The proposed method provides a simple and effective way to calculate the forces, moments and energy required for the processes of local and global buckling. Moreover, the effect of the thickness ratio, T/ h, on the total strain energy can be studied in a continuous range of values, while other methods investigate this parametric effect discretely. The effect of delamination length and position in the buckling behavior are also investigated. The analytical results compare favorably with results of similar, but more elaborate, studies.

Bending strength of delaminated aerospace composites

“…An analytical model by Shan & Pelegri [3] accounted for forces and moments at the delamination tips when the local buckling of the sub-laminate interacted with global buckling of the specimen.…”

Estimation of thermal transmittance based on temperature measurements with the application of perturbation numbers

“…Such investigation studies have been carried out for example by Nowoświat [32], and they involved the control and stability of Duffing oscillator. Perturbation methods have been applied to investigate the buckling of springy beams [33]. Very interesting modifications of this method and the explanation of perturbation numbers have been proposed by Skrzypczyk [34].…”

Buckling and postbuckling behavior of delaminated composite struts

“…The influence of a single delamination [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] and multiple delaminations [17][18][19] has been investigated. Experimental [2,6,11,17,19] and theoretical studies [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]18] can be found. Theoretical work follows two different approaches: balance equations of linear and angular momentum [1,[4][5][6][11][12][13] or the minimum of total potential energy principle [2,3,…”

“…Experimental [2,6,11,17,19] and theoretical studies [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]18] can be found. Theoretical work follows two different approaches: balance equations of linear and angular momentum [1,[4][5][6][11][12][13] or the minimum of total potential energy principle [2,3,7,8,10]. Results obtained are often validated using the finite element method (FEM) [3,7,8,10,13].…”