A Nonlinear Viscoelastic and Micromechanical Damage Constitutive Model for Solid Propellant

Zhi Xu Gu; Jian Zheng; Wei Peng; Xi Nan Tang; Jun Hui Yin

doi:10.4028/www.scientific.net/AMR.750-752.2196

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 750-752A Nonlinear Viscoelastic and Micromechanical...

A Nonlinear Viscoelastic and Micromechanical Damage Constitutive Model for Solid Propellant

Abstract:

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.

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Periodical:

Advanced Materials Research (Volumes 750-752)

Pages:

2196-2199

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.750-752.2196

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Online since:

August 2013

Authors:

Zhi Xu Gu*, Jian Zheng, Wei Peng, Xi Nan Tang, Jun Hui Yin

Keywords:

Composite Solid Propellant, Constitutive Model, Damage Evolution, Microcrack Extension

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