Abstract
A sandwich-structure heating element (HE) of hexagonal boron nitride (h-BN) decorated polyetherimide (PEI) and plain weave carbon fiber fabric (CFF) of different fabric weight was fabricated to bond carbon fiber reinforced polyetherimide (CF/PEI) laminates by resistance welding. The effects of fabric weight of CFF and thermal conductivity of insulating films on the lap shear strength (LSS) of resistance welding joints and failure mode of CF/PEI composites were investigated. The LSS of the composite joints increased by 31.4% due to the improvement the thermal conductivity of PEI composite film, as well as the reduction of the current leakage during welding process. Intralaminar failure of joints and breakage of carbon fibers of CFF in HE was observed.
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