Static and Mode Analyses of Composite Plates Using Modified 16-Node Solid Elements, and Prediction of Stiffness Errors Resulting from Reduced integration

摘要

In this paper, an equation for sampling point modification is derived which can correct the stiffness stiffening phenomena in a composite plate. This stiffening phenomena is corrected by modifying Gauss sampling points in the numerical integration of stiffness matrix. The stiffness is assumed to be a quadratic function, thereby enabling the prediction of the errors caused by reduced integration. This assumption is confirmed through a comparison of the predicted and actual errors.