Effects of Mold Temperature and Cooling Rate on Mechanical Properties of Press Consolidated Thermoplastic Composite

摘要

Mechanical properties of glass fiber reinforced composite were investigated as functions of temperature and cooling rate in pre-heating, consolidation and cooling sections during the manufacturing processing, Rapid Press Consolidation Technique (RPCT). Among the processing parameters such as temperature, time and pressure in three sections, it is found that temperature and pressing time in pre-heating section are the most critical factors in determining the tensile strength. Mold temperature and pressing force during consolidation are very important for stiffness and molded condition of specimen. To assess the effects of temperature and cooling rate, mechanical properties such as tensile, impact and interlaminar shear strengths with crystallinity (X_c) are investigated for different mold temperatures and four different cooling rates. Also, AE is adopted to investigate the fracture behaviors and their effects depending on interface condition and types of specimens. The different combinations of matrix (PET fiber and film) and glass fiber (woven fabric and continuous fiber) are used.