Pitch계 탄소섬유 stitching density에 따른 CF/PEEK 복합재의 전도 용접 성능 분석

Abstract

This study examines how the stitching density of pitch-based carbon fibers affects the thermal welding efficiency of CF/PEEK composites. Stitching at 5 mm and 10 mm intervals was compared, showing that higher density significantly enhanced through-thickness thermal conductivity-up to 9.740 W/m<middle dot>K. This improvement enabled faster heat transfer and effective welding at lower temperatures. However, lap shear strength remained similar across all samples, with only minor variation. While stitching density had little impact on joint strength, it greatly improved thermal conduction and weld stability. The proposed design offers potential for efficient low-temperature welding of large thermoplastic composite structures.