This course encompasses several theoretical aspects for damage mechanics applied to engineering materials. The course starts by introducing the phenomenological description of damage, from the micro to the macro stage using the effective stress formulation for isotropic and anisotropic materials. The thermodynamic model admissibility is presented, and its contribution to the mechanical representation of damage. For the case of brittle damage regularization techniques are introduced to prevent mesh dependency, using fracture energy regularization, non-local state/field variables, and even gradient enhanced damage. Several isotropic and orthotropic damage models are presented as examples, and its formulation is discussed and studied. It is also briefly presented viscoelasticity models, discrete damage mechanics and delamination. For practical analysis, numerical examples are presented with the commercial finite element software ABAQUS, using library damage material models, and user subroutines UMAT with Fortran 90. It is envisioned for engineer science students who wish to develop comprehensive skills in this field, from essential concepts to more practical computer-aided design.

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Prof: Mário Rui Tiago Arruda - Instituto Superior Técnico da Universidade de Lisboa The lecture course consists of the following chapters: 1. Introduction to damage mechanics 2. Phenomenological description of damage 3. Thermodynamics of damage 4. Mechanical representation of damage 5. Mesh dependency and regularization techniques 6. Isotropic and orthotropic damage models 7. Practical examples with ABAQUS software

In presenza

Presentazione orale

P.D.2-2 - Settembre