Effects of insulating layer of resistance heating element on resistance welding behavior of woven-CF/PPS laminates

This study aimes to reveal the effects of resistance heating element joining strength of CF/PPS laminates. The contents for evaluation were cross sectional of resistance heating element, electric conducting behavior, surface condition of joint section peeled off after applying current and single lap shear strength. The material for the experiment was woven CF/PPS laminates as joining welding test specimen. In order to prevent the electrical leakage from the resistance heating element to the laminate, a glass cloth or ceramic fiber paper was inserted into the resistance heating element to perform fusion bonding. As a result, the electric current required for fusion is reduced by the influence of the insulation layer, but the tensile shear strength is reduced by about 30% compared to the resistance heating element without the insulation layer inserted.