Multi-physical field state characterization of CFRP tube based on heating mode of built-in induction coil

Based on the multi-physical field coupling analysis method, a finite element meso model of an induction heating circular tube containing carbon fiber texture and resin matrix is established, and the change law of the temperature field and stress of the circular tube is verified by experiments in order to study the distribution and change law of each physical field of induction heating technology in the heating process of a carbon fiber composite (CFRP) circular tube. This paper's electro-magnetic thermal mechanical coupling analysis model is shown to be accurate. The temporal and spatial variation laws of the temperature field, curing degree, and stress field in the process of multi-coil heating in a CFRP circular tube are investigated using the analytical model. The induction heating method of magnetic field superposition and coupling is proposed to improve the forming quality of carbon fiber circular tubes. The coupling state between magnetic fields changes with time, resulting in the dynamic change of eddy current and heat generation in the material and improving the uniformity of heat distribution in the periodic range which can effectively improve the uniformity of the temperature field, curing degree, and stress distribution of circular tubes and improve the quality of CFRP circular tubes in the forming process.