| Journal: | Journal of the Brazilian Society of Mechanical Sciences |
| Database: | PERIÓDICA |
| System number: | 000312048 |
| ISSN: | 0100-7386 |
| Authors: | Jung, Gyoo-Dong1 Youn, Sung-Kie2 Kim, Bong-Kyu |
| Institutions: | 1Agency for Defense Development Yusung, Yusung, Taejon. Corea del Sur 2Korea Advanced Institute of Science and Technology, Department of Mechanical Engineering, Yusung, Taejon. Corea del Sur |
| Year: | 2000 |
| Volumen: | 22 |
| Number: | 3 |
| Pages: | 457-476 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | A three dimensional nonlinear viscoelastic constitutive model for the solid propellant is developed. In their earlier work, the authors have developed an isotropic constitutive model and verified it for one dimensional case. In the present work, the validity of the model is extended to three-dimensional cases. Large deformation, dewetting and cyclic loading effects are treated as the main sources of nonlinear behavior of the solid propellant. Viscoelastic dewetting criteria is used and the softening of the solid propellant due to dewetting is treated by the modulus decrease. The nonlinearities during cyclic loading are accounted for by the functions of the octahedral shear strain measure. The constitutive equation is implemented into a finite element code for the analysis of propellant grains. A commercial finite element package ABAQUS is used for the analysis and the model is introduced into the code through a user subroutine. The model is evaluated with different loading conditions and the predicted values are in good agreement with the measured ones. The resulting model applied to analyze a solid propellant grain for the thermal cycling load |
| Disciplines: | Ingeniería |
| Keyword: | Ingeniería de energéticos, Propergol sólido, Viscoelasticidad, Modelos constitutivos, Daño, Carga cíclica |
| Keyword: | Engineering, Energy engineering, Solid propellant, Viscoelasticity, Constitutive models, Damage, Cyclic loading |
| Full text: | Texto completo (Ver HTML) |
