Damage accumulation in a carbon fiber fabric reinforced cyanate ester composite subjected to mechanical loading and thermal cycling

摘要: Abstract Carbon fiber reinforced cyanate ester composites are of interest for space structural applications because their high specific strength and stiffness, but also dimensional stability resistance to microcracking. This new type composite materials is promising, so far experimental data remains scarce. In this work we have characterized the microcracking behavior a composite, focusing on conditions under which initiates. The performance these was investigated by accumulation damage from extreme thermal externally applied stresses. For purpose, five-harness satin weave in [0/45]s subjected micromechanical testing three point bending. Microdamage accumulating during monotonic loading monitored in-situ imaging, show that cyclic tests increasing amplitude can detect such damage. We material stress using thermomechanical dynamic mechanical analyzers (TMA DMA) fast cycling method. tests, no variation coefficient expansion (CTE) or degradation modulus TMA DMA, could be detected visual inspection. However, faster resulted formation significant reduction modulus. These results suggest possible failure mode material, should taken into consideration aerospace applications.