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A novel time dependent cohesive zone model (CZM) is proposed in this paper based on two main assumptions. Firstly, ultimate cohesive parameters are inherent and fixed for a given non-aging bond interface. The apparent cohesive parameters are time related variables. Secondly, relaxation response of the interface is the main reason for the time dependent traction. Numerical simulation shows that the...
A new constitutive equation for solid propellant with the effects of aging and viscoelastic Poisson’s ratio is proposed. Effects of thermo-oxidative aging and viscoelastic Poisson’s ratio are considered in this comprehensive constitutive equation with two sets of reduced time system coping with the time and temperature dependence. In order to simulate the single and combined effects of aging and viscoelastic...
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