Abstract
Carbon fiber reinforced thermoplastics (CFRTP) have great potential about high-cycle molding in one minute. However, the relationship between cost reduction and well-impregnated composite materials for automotive parts is trade-off because thermoplastic resins have high viscosity and difficulty for impregnation into reinforcement fibers. So an effective quantification on impregnation of CFRTP is required for mass production of automotive parts. Non-destructive quantification of void fraction of CFRTP with soft X-ray transmittance were investigated. We measured X-ray transmittance of CF/PP plate with 3 different void content. As a result, the attenuation coefficient of X-ray had highly linear correlation with the density, which can be used to calculate void fraction of composite. In conclusion, non-destructive measurement by soft X-ray can be applied for the quality management of mass production of automotive parts because the distribution of void content in parts can be measured.
