弹道学报2016，Vol.28Issue(2)：62-67,6.
基于能量耗散率的 NEPE 推进剂疲劳损伤分析
Fatigue Damage Evaluation of NEPE Propellant Based on Dissipated Energy
摘要
Abstract
To study the fatigue damage evolution of NEPE propellant in controlled strain fatigue tests ,the ratio of dissipated energy change-approach based on the distribution of dissipated energy was used to analyze the fatigue damage process .According to four strain-amplitudes,the uniaxial drawing fatigue test was conducted .The fatigue life and dissipated energy under different strain-amplitudes were obtained .The result shows that the energy approach can intuitively explain the damage accumulation in the process of fatigue damage.Plotting plateau value of ratio of dissipated-energy and fatigue life behave in a linear relation.The plateau value is highly dependent on the initial loading strain amplitude , and the plateau value increases with the strain amplitude .The accumulative rates of the damage increase with the strain levels for the adjacent loading cycles , but the fatigue life decreases relatively , and the mechanism of damage increasing between the adjacent loading cycles can be explained .关键词
NEPE推进剂/耗散能/疲劳损伤/能量耗散变化比Key words
NEPE propellant/dissipated energy/fatigue damage/ratio of dissipated energy change分类
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郭坚,许进升,高艳宾,何勇,陈雄..基于能量耗散率的 NEPE 推进剂疲劳损伤分析[J].弹道学报,2016,28(2):62-67,6.基金项目
江苏省青年基金项目（BK20140772）；中央高校基本科研业务费专项资金资助 （）
