열습환경을 고려한 항공기용 레이돔 볼트 체결부의 베어링 강도에 관한 연구

This research investigated the hygrothermal effect on the strength of the bolt jointed section and moisture contents of composites exposed to hygrothermal environment for composite aircraft radome. The decrease in the strength by testing environments is mainly attributed to the change of the material properties of matrix by temperature and moisture. The composite specimens were tested in three different environmental conditions of RTD(room temperature and dry), CTD(cold temperature and dry) and ETW(elevated temperature and wet). The failure mode of the bolt jointed composite specimens are studied by test and finite element analysis. Finite element analysis reasonably predicts the failure load and mode of the joints. Reliability-based design is performed for the bolt jointed composites of radome.