205 CFRPにおける界面強度の温度・時間依存特性(高分子/高分子基複合材料)

概要

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In order to discuss a long-term durability of polymer matrix composite materials, an investigation of time-temperature dependencies of the interfacial strength is indispensable. In the present study, the time-temperature dependencies of carbon-fiber reinforced polymeric composite material are extracted from transverse tensile test results of the unidirectional composite. To avoid tab-failure of the test, only around center in length of the specimen is subjected to elevated temperature. The testing speed is varied widely to make the specimen failures interface- and matrix-failure dominant mode. Whether interface or matrix dominant failure mode is verified by fractography results. The time dependency of the interface strength is presumably found to be negligible as well as authors reported before employing another material. The temperature dependency of that is found that the interface strength decreases with temperature.
2009-11-06