CAJ | 학술논문

以某固体火箭发动机为例,建立了舰船摇摆载荷作用下发动机药柱粘接界面的疲劳损伤模型.通过推进剂粘接界面定应力往复剪切试验获得了界面的疲劳损伤S-N曲线;选取残余应变为损伤变量,并根据试验数据建立了推进剂粘接界面的疲劳损伤演化模型.试验及研究结果表明,推进剂粘接界面应力幅值和疲劳破坏次数的自然对数满足方程Y=0.748 exp(-X/5.663)-0.0261.推进剂粘接界面在舰船摇摆载荷作用下的疲劳损伤量与循环加载比满足方程D=0.1517(1-exp(-β/0.0386)+0.8483()1-(1-β)1.1.)
이모고체화전발동궤위례,건립료함선요파재하작용하발동궤약주점접계면적피로손상모형.통과추진제점접계면정응력왕복전절시험획득료계면적피로손상S-N곡선;선취잔여응변위손상변량,병근거시험수거건립료추진제점접계면적피로손상연화모형.시험급연구결과표명,추진제점접계면응력폭치화피로파배차수적자연대수만족방정Y=0.748 exp(-X/5.663)-0.0261.추진제점접계면재함선요파재하작용하적피로손상량여순배가재비만족방정D=0.1517(1-exp(-β/0.0386)+0.8483()1-(1-β)1.1.)
The interface fatigue damage evaluation method of propellant under swing loading was established for some SRM (solid rocket motor). The interface fatigue damage S-N curve of composite solid propellant was ac?quired by fixed stress amplitude cycle loading shear experiment. The remain strain was selected as damage vari?able. Fatigue damage model was established according to analyzing the test data. The experiment results show ed that the shear stress and lnN of interface accorded with equation Y=0.748 exp(-X/5.663)-0.0261. Interface fa?tigue damage model of solid rocket motor under ship motion loading accorded with equation D=0.1517( 1-exp(-β/0.0386) +0.8483( ) 1-(1-β)1.1 . )