Prediction of Manufacturing Induced Residual Stress and Deformation of Composites Using Mechanics of Structure Genome Based Shell Theory

摘要

An efficient shell model based on mechanics of structure genome is introducedto predict manufacturing induced residual stress and deformation for composite laminates.This model utilize shell elements in commercial finite element codes to representthe composite laminate, which greatly reduces the computational cost comparedwith a direct numerical simulation (DNS) using 3D solid elements or accuracy losscompared with using smeared properties. In this study, a line through the thickness ofthe composite laminate is chosen to be the structure genome, separating the original3D body into a 1D through the thickness analysis and a 2D shell analysis. Constitutiverelations for the shell elements, considering the effect of residual stress and strain, areconstructed. The tool is modeled using 3D elements with a relative coarse mesh anda contact interaction is applied between the tool and composite part, as commonlydone in a DNS. Several case studies are presented with comparison between DNSand analysis using smeared properties.