This invention relates to a method for predicting intra-layer and inter-layer damage under the thermo-mechanical
coupling effect of CFRP drilling, belonging to the field of
carbon fiber composite material drilling. It involves a comprehensive prediction method for intra-layer and inter-layer damage in CFRP laminates during drilling. The aim is to address the problems of neglecting material property thermal degradation, low computational efficiency, and element
distortion in existing technologies. This method analyzes the mechanical behavior of a single CFRP layer under temperature variations, defines failure criteria and damage evolution criteria considering temperature effects, and simulates the inter-
layer interface using cohesive elements. Based on the ABAQUS
finite element simulation software, a drilling thermo-mechanical
coupling simulation model of the CFRP laminate is established. This model significantly improves computational efficiency by optimizing mesh size, adjusting the
mass scaling factor, and selecting appropriate element types, while ensuring the accuracy of
simulation results. By calculating this
simulation model, a comprehensive prediction of CFRP laminate drilling
delamination and intra-layer damage is achieved, obtaining the intra-layer and inter-layer damage conditions after drilling considering temperature effects. This method enables a comprehensive analysis of CFRP laminate drilling
delamination and intra-layer damage, suitable for guiding the suppression of drilling damage.