Influences of Carbon Fiber/Epoxy Prepreg Pre-Heating and Storage Aging on Composite Mechanical Properties
CHEN Ping1,2, ZHAO Yueqing1, LI Hongfu3, ZHANG Boming1
( 1. School of Materials Science and Engineering, Beihang University, Beijing 100191, China;
2. Institute of Aeronautical Manufacturing Technology, Shanghai Aircraft Manufacturing Corporation Ltd.,
Shanghai 200070, China;
3. School of Transportation Science and Engineering, Beihang University, Beijing 100191, China )
Abstract：The curing behavior was firstly characterized through different scanning calorimetry (DSC) using modelfree
kinetic method (Flynn-Wall-Ozawa, FWO). The results show that FWO is suitable to describe and predict the curing
process. At the same time, combining with the characteristic of diaphragm forming, prepreg pre-treated at different time
and temperatures were used to product composite laminates. Then the interlaminar shear and bending properties were
tested. The results show that with the increase of pre-heating time at 80℃ , the shear strength gradually decreases while the
thickness of the specimens increases. The flexural modules decrease slightly compared with that of specimens without preheating.
For specimens aging at room temperature, the shear strength and flexural properties show small fluctuation with no
obvious regularity as the prolongation of aging time.
2017, 
