A nonlinear viscoelastic constitutive model for cyclically loaded solid composite propellant
| Autor: | Marieme Imene El Ghezal, Xin Tong, Jin-sheng Xu, Xiong Chen, Anouar Krairi, Issam Doghri |
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| Rok vydání: | 2020 |
| Předmět: |
Propellant
Materials science Applied Mathematics Mechanical Engineering Composite number Constitutive equation 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology Condensed Matter Physics Viscoelasticity Nonlinear system Hysteresis 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials Modeling and Simulation Cyclic loading General Materials Science 0210 nano-technology Finite element code |
| Zdroj: | International Journal of Solids and Structures. 198:126-135 |
| ISSN: | 0020-7683 |
| Popis: | In this paper, a novel nonlinear viscoelastic constitutive model is proposed to describe the mechanical behavior of a polymer matrix composite (HTPB propellant). The model is built upon two stress-dependent nonlinear functions within the hereditary integral formulation of viscoelasticity. After implementation into a finite element code, the proposed model is utilized to simulate the stress-strain responses of cyclically loaded HTPB propellant. The results show that the model is capable of capturing the main characteristics of the hysteresis loops during fatigue process and good quantitative agreement is found under circumstances that self-heating effect is not evident. This paper deepens the understanding of the nonlinear behaviors of composite propellant under cyclic loading. |
| Databáze: | OpenAIRE |
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