Simulation of heat transfer model based on finite element method for edge trimming of CFRP

Carbon fiber reinforced composites are subjected to machining operations to obtain desired shape and dimensions. Edge trimming is one of the most commonly used post cure operation for the parts made from CFRP. Thermal loading of CFRP workpiece is inevitable during trimming process as some part of heat generated during the process dissipates into the workpiece. Accurate measurement and estimation of temperatures in the trimming zone is vital for understanding amount of heat evacuated through the workpiece. Finite element analysis is used to simulate the temperature field near and away from the trimming zone in this work. This computational model consists of two dimensional heat source representing the trimming tool cutting along the trimmed edge. The results from linear and uniform flux distribution are obtained and compared. The results are validated by measuring in situ temperature experimentally in the workpiece. Thermocouples are installed in the workpiece along perpendicular direction of the machined edge. Digital infrared thermography is used to measure temperature along the trimmed surface. Analytical methods are used to extrapolate the measurements to the point of interface. This model is an excellent tool to estimate heat partition into workpiece which has potential for extension and estimation of the part of the heat evacuated through the tool and chips.