Abstract: In order to investigate the fatigue properties of HTPB propellant under stress loading,fatigue tests with different stress amplitudes were carried out on the dynamic thermo mechanical analyzer.The results showed that when the stress amplitude increased,the fatigue life was shortened.The bigger the stress amplitude was,the bigger the maximum fatigue strain was,the smaller the fatigue residual strain was,and the ultimate fracture strain value was basically the same.Based on the damage mechanics theory,the fatigue damage evolution model which can consider the stress amplitude was established by using the maximum fatigue strain as damage factor.The model can overcome the shortcomings of Chaboche model that can't explain the cyclic strain relaxation,therefore it can be used to characterize the damage evolution law of materials very well.
梁蔚, 陈雄, 许进升. 应力控制下HTPB推进剂的疲劳损伤及寿命研究[J]. 化工新型材料, 2018, 46(11): 146-149.
Liang Wei, Chen Xiong, Xu Jinsheng. Study on fatigue damage and life of HTPB propellant under stress control. New Chemical Materials, 2018, 46(11): 146-149.
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