Stress concentration and buckling behaviour of shear loaded composite panelswith reinforced cutouts

摘要

Numerical and experimental studies have been conducted to investigate the effectof reinforcements around cutouts on the stress concentration and bucklingbehaviour of a carbon/epoxy composite panel under in-plane shear load. Fourdifferent types of cutout reinforcements made of a range of materials wereevaluated. In the analysis, finite element method and an analytical method basedon the laminate theory were employed to perform parametric studies on thevarious reinforcement designs. Four test panels were then manufactured andtested to validate the analysis results. Good agreement was found between theanalytical and test results. Based on the validated analytical models, the bestcutout reinforcement was determined.