THERMO-HYDRO FRACTURE AND VISCOELASTIC BEHAVIOR OF TIMBER BASED MATERIALS: NUMERICAL ANALYSIS

Rostand Moutou Pitti (1) , Seif Eddine Hamdi , Frédéric Dubois (2) , Eric Fournely (3) , Manja Kitek Kuzman

1 IP - Institut Pascal
2 GEMH - Groupe d'Etudes des Matériaux Hétérogènes
3 LAMI - Laboratoire de Mécanique et Ingénieries

The rupture in mixed mode coupling of mechanical and thermal loads for isotropic and orthotropic materials such as wood is studied. The analytical formulation of the energy-release rate is introduced by the integral T and A, which couple the rupture in mixed mode, the thermal effects and the pressure applied on the crack lips. This new formulation is based on the laws of energy conservation and real and virtual mechanical and thermal fields based on the arbitrary, Lagrangian and Eulerian configurations. The Mixed-Mode Crack Growth specimen providing a decrease of the energy-release rate during crack propagation is considered in order to compute the various mixed-mode ratios. The analytical formulation is implemented using the finite-element software Cast3m. The efficiency of the proposed model is justified by showing the evolution of the energy-release rate and the stress-intensity factors versus the crack length and versus the temperature variation in a time-dependent material.

Mots clés: mixed mode crack growth; thermal fields; hydric loads; path-independent integral; finite element method; wood material; time-dependent material

Domaines: Matériaux; Structures; Matériaux composites et construction; Construction durable

Rostand Moutou Pitti, Seif Eddine Hamdi, Frédéric Dubois, Eric Fournely, Manja Kitek Kuzman. THERMO-HYDRO FRACTURE AND VISCOELASTIC BEHAVIOR OF TIMBER BASED MATERIALS: NUMERICAL ANALYSIS. WCTE 2016 World Conference on Timber Engineering , Aug 2016, Vienna, Austria. ⟨hal-01616937⟩