| Journal: | Computational & applied mathematics |
| Database: | PERIÓDICA |
| System number: | 000310636 |
| ISSN: | 0101-8205 |
| Authors: | Bonetti, Elena1 Fremond, Michel2 |
| Institutions: | 1Universita di Pavia, Dipartimento di Matematica, Pavia, Lombardia. Italia 2Laboratoire Central des Ponts et Chaussees, Laboratoire Lagrange, París. Francia |
| Year: | 2003 |
| Volumen: | 22 |
| Number: | 3 |
| Pages: | 313-333 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | This paper deals with a mechanical model describing the evolution of damage in elastic and viscoelastic materials. The state variables are macroscopic deformations and a microscopic phase parameter, which is related to the quantity of damaged material. The equilibrium equations are recovered by refining the principle of virtual powers including also microscopic forces. After proving an existence and uniqueness result for a regularized problem, we investigate the behavior of solutions, in the case when a vanishing sequence of external forces is applied. By use of a rigorous asymptotics analysis, we show that macroscopic deformations can disappear at the limit, but their damaging effect remains in the equation describing the evolution of damage at a microscopic level. Moreover, it is proved that the balance of the energy is satisfied at the limit |
| Disciplines: | Ingeniería, Matemáticas |
| Keyword: | Ingeniería de materiales, Modelos mecánicos, Daño, Principio de poder virtual, Elasticidad, Análisis asintótico |
| Keyword: | Engineering, Mathematics, Materials engineering, Mechanical models, Damage, Principle of virtual power, Elasticity, Asymptotic analysis |
| Full text: | Texto completo (Ver HTML) |
