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A micromechanical damageconstitutive model for solid propellant

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4 Author(s)
Feng Guo-fei ; Dept. of Artillery Eng., Ordance Eng. Coll., Shijinzhuang, China ; Peng Wein ; Tang Xi-nan ; Zhang Ying-Tang

This paper studies the damage process induced by dewetting microcracks in composite solid propellant. A nonlinear viscoelastic constitutive model for composite soild propellant is presented. The damage variable D is derived from the microcrack system and is function of microcrack size density. The damage evolution equation is determinded by the extending of microcrack. Form the proposed model of microrack evolution process, an explicit form of damage evolution equation which is a function of stress field is given. The cracking event N and the new crack surface area damage ΔA formed by microcrack extension are defined. Material constants are determinded by acoustic emission tests.The rationality of our model has been confirmed by tension tests.

Published in:

Mechanic Automation and Control Engineering (MACE), 2011 Second International Conference on

Date of Conference:

15-17 July 2011

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