Origami-inspired reforming method for carbon fiber-reinforced thermoplastics via simple thermal stitching

Abstract

Interest in carbon-fiber-reinforced polymer (CFRP) composites is increasing owing to their excellent mechanical properties, low weight, and good corrosion and fatigue resistance. Generally, CFRPs are not reformable after completing the forming process because they are hard materials. Currently, no simple technique is available to reform CFRPs. In this study, a novel stitching technique was developed for forming a thermoplastic CFRP (CFRTP) composite. Carbon laminates were stitched with electrically conductive threads and heated by applying voltage through the threads. Study results showed that temperature control and matrix cracking during folding are key factors in this process. This new method provides a useful approach for manufacturing CFRTPs without using complex molds or heavy equipments.