Nalysis of mechanical problems using agradient-enhanced damage theory

Stella Maris Pires Domingues ^[1] ; Heraldo Costa Mattos ^[1] ; Fernando Alves Rochinha ^[2]
1. [1] Universidade Federal Fluminense
  
  Universidade Federal Fluminense
  
  Brasil
2. [2] Universidade Federal do Rio de Janeiro
  
  Universidade Federal do Rio de Janeiro
  
  Brasil
Localización: Métodos Numéricos en Ingeniería: [Comunicaciones presentadas al IV Congreso de Métodos Numéricos en Ingeniería celebrado en Sevilla durante los días 7-10 de Junio de 1999] / R. Abascal (ed. lit.), José Domínguez Abascal (ed. lit.) , G. Bugeda (ed. lit.), 1999, ISBN 84-89925-45-3
Idioma: inglés
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Resumen
- The present work deals with a gradient-enhanced damage theory for elastic brittlematerials able to perform a macroscopic description of material degradation. A simplenumerical technique, based on the finite element method, is proposed to approximate thesolution of the resulting non-linear mathematical problems. The coupling between damageand strain variables is circumvented by means of a splitting technique. The crack initiationand propagation can be predict by observing the points where the damage has reached acritical value. In order to present the physical coherence of the model some plate problemsare exploited.