Thermal–mechanical coupling numerical simulation and low damage analysis for drilling composite

Abstract

In this paper, a progressive damage analysis model of thermal–mechanical coupling dynamic response and damage evolution for composite under the drilling thrust and friction force is established based on elastic dynamics, heat conduction and damage criterion. Then the thermal–mechanical coupling model of low damage strategy for drilling composite by support metal is established, and the thickness of the support metal is considered. Further, a quantitative evaluation method of composite damage during drilling process is proposed and the quantitative evaluation of matrix damage and interlayer damage is realized. At last, the mechanism and influence for supporting structure to reduce the damage during the drilling process is analyzed by means of thrust force, torque, temperature and damage.