943 高真空環境における SCFR-PI の機械的特性に及ぼす温度環境の影響について

概要

論文の詳細を見る
In this report, we study the tensile strength and Young's modulus of short carbon fiber reinforced thermoplastic polyimide composites (SCFR-PI) in temperature and high vacuum conditions. In order to clarify the mechanical behavior of SCFR-PI composites, tensile tests are performed by the use of thermal fatigue testing equipment. Even though tested at the same temperature 298K, the tensile strengths kept in high vacuum condition are higher than that in the atmospheric condition. Furthermore, the SCFR-PI has higher equivalent Young's modulus than that in the atmospheric condition. In high vacuum condition, the matrix resin is shrank due to the degas and/or moisture desorption from the matrix and from the interface between the matrix and fibers, and then yield the residual stresses in composites. A homogenization theory with multi-scale asymptotic expansion is described for evaluation of SCFR-PI composites in space environment.
社団法人日本機械学会の論文
2003-08-05