Journal of Projectiles, Rockets, Missiles and Guidance >
The Effect of Fatigue Damage on Mechanical Property of NEPE Propellant
Received date: 2013-07-01
Online published: 2025-05-30
In order to study the effects of fatigue damage on mechanical property of NEPE propellant, the elastic modulus of the NEPE propellant after different fatigue cycles was determined. The fatigue tests in present work were conducted with a sinusoidal loading frequency of 5 Hz with specific cycles. After unloading, uniaxial tension tests were carried out to obtain the elastic modulus. The damage factor D was defined based on the elastic modulus, and then fatigue damage equation was established. The parameters of the equation were evaluated by fitting the fatigue test data. The results show that fatigue damage can affect the elastic modulus of the NEPE propellant. Damage factor increases with the number of cycle. At the initial stage of the cycle phases, damage evolution is fast. With the increased number of cycles, its rate of increasing reduces continuously. Keywords: NEPE propellant: DMA; fatigue damage; elastic modulus; fatigue softening; debonding
Key words： NEPE propellant; DMA; fatigue damage; elastic modulus; fatigue softening; debonding
GAO Yanbin , CHEN Xiong , HU Shaoqing , JU Yutao . The Effect of Fatigue Damage on Mechanical Property of NEPE Propellant[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2014 , 34(2) : 90 -93 . DOI: 10.15892/j.cnki.djzdxb.2014.02.006
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