A Sensitivity Analysis Method for Finite Element Simulation of CFRP Drilling Process

This paper developed a sensitivity analysis method for FE simulation of CFRP drilling process to rank the parameters in order of importance. Firstly, a FE model of CFRP is established using ABAQUS/Explicit. A standard twist drill is imported from stp-formatted files, then it is meshed using C3D4 element and treated as rigid body. The CFRP is modeled as a shell and 2D Hashin Criteria is used to represented the damage. Secondly, a back-propagation artificial neural network is established and trained with the data generated by the FE models using different parameters, which is designed by uniform design method. Lastly, the sensitivity analysis of the back-propagation artificial neural network is carried out using analytical method. The sensitivity of the parameters in the FE model is calculated using a MATLAB program.