摘要
Abstract
Carbon fiber reinforced thermoplastic composite(CFRTP)is increasingly utilized in aerospace and automotive manu-facturing sectors owing to its exceptional specific strength,strong toughness,and weldability.Induction welding stands as a pivotal method for fabricating typical CFRTP components.However,the intricate interplay of magnetic,thermal,and stress coupling during the induction welding process,along with its evolution and distribution characteristics,remains unclear,significantly impeding the cost-effective,efficient,and high-quality production of CFRTP components.In this study,a magnetic-thermal-mechanical coupling simulation model is developed for the induction welding of CFRTP stringer skin structures.This model is employed to investigate the distribution and evolution patterns of the magnetic field,temperature field,and residual stress field.The results show that under the influence of an alternating electromagnetic field,the magnetic field strength peaked at 1.45 mT in the component's edge region.Notably,the simulated magnetic,temperature,and stress field all exhibit significant edge effects,which are intimately tied to the skin effect induced by high-frequency eddy currents.During welding,asymmetric and nearly elliptical high-temperature zones emerge on both sides of the skin's bottom,with temperatures in proximity to the stringer area notably higher than those farther away.When the current frequency increases from 150 kHz to 250 kHz,the maximum stress of the induction joint increases from 637 MPa to 778 MPa,and the asymmetric stress concentration area at the welding interface expands accordingly.The measured temperature field and stress results are in high agreement with the simulation outcomes,effectively validating the model's accuracy and applicability.This study offers theoretical backing for process optimization and quality control in the induction welding of intricate CFRTP components.关键词
热塑性复合材料/磁-热-力耦合仿真/温度场/应力场/磁场/感应焊接Key words
thermoplastic composite materials/magnetic-thermal-mechanical coupling simulation/temperature field/stress field/magnetic field/induction welding
