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- W2348936108 abstract "In order to make accurate analysis of the grain integrity of modified double-based propellant, the numerical simulation using the secondary developed UMAT subroutine of the ABAQUS finite element software of a certain type of rocket under high overload were completed based on accumulative damage nonlinear viscoelastic constitutive model. The deformation and mechanical behavior of the grain were analyzed. The results show that the maximum stress take place in the inner circle of grain bottom under high acceleration overload with the maximum value is 1.39×104g.Considering that the radial deformation of grain is too small,the constraint to grain outside surface imposed by case of solid rocket motor can be ignored and thus the grain outside surface can be taken as a free surface. Two different kinds of strength criterions were compared to judge the solid rocket propellant grain integrity under the acceleration impact load and the end face pressure impact load. The Maximum stress strength criterion as well as the strength criterion based on accumulative damage both suggest that the grain should not be destroyed." @default.
- W2348936108 created "2016-06-24" @default.
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- W2348936108 date "2014-01-01" @default.
- W2348936108 modified "2023-09-23" @default.
- W2348936108 title "Research on Numerical Simulation Method of Grain Strength Based on Damage Constitutive Model under High Overload" @default.
- W2348936108 hasPublicationYear "2014" @default.
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