Estimating Method for Creep Property of Carbon Fiber Reinforced Polyamide by Enhancing Stepwise Temperature

Abstract

Generally, to determine the creep property of a composite material, test must be carried out continuously for about 10³ hours under a steady condition. However, power failure, earthquake or impact may occur as obstacles. In order to avoid these problems and obtain accurate data, it is necessary to carry the test on each specimen by using a single test device and collect the data in a short term as possible.
Therefore, it was tried to evaluate the creep property of a specimen by enhancing the environment temperature in a step wise manner. It was found that the influence of thermal history, such as the environment temperature and hold time of each stepwise temperature change was slight up to the last step where the creep fracture occurred. Consequently, this method is considered valid for understanding the profile of creep property.