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Effects of Process-Induced Fiber Bundle Waviness on the Flexural Strength of Carbon Fiber Reinforced Thermoplastic Composites

Tomohiro Yokozeki, Kotaro Akakabe, Takahira Aoki and Akira Kobiki


This study focuses on the process-induced fiber bundle waviness in carbon fiber reinforced thermoplastic composites (CFRTP). Fiber bundle waviness is often observed in manufactured CFRTPs, which deteriorates the mechanical properties. This study experimentally investigates the quantitative measurement of fiber bundle waviness in unidirectional CFRTP using the optical microscope and the X-ray CT scanning. Flexural mechanical properties are measured in relation to the magnitude of the included fiber waviness. Strength deterioration is experimentally evaluated as a function of the fiber waviness parameter.

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