This class introduces the fundamentals of damage mechanics and modelling procedures to describe degrading processes evolving at material and structural level. The main damage model families presented in literature are illustrated, specially focusing on those developed for brittle like materials. Also, the coupling with plasticity formulations is introduced, and isotropic and anisotropic formulations are referred to. Some hints concerning localization problems related to strain softening behavior and pathological mesh dependency of the finite element solutions are given, together with the main regularization techniques. Then, the mechanics of damaging interface is treated, illustrating the modelling approach which accounts for the interface opening in mode I, mode II and mixed mode. Moreover, the unilateral contact is considered, and the possible frictional and interlocking effects are described. Finally, structural problems in presence of degrading processes are shown.
May 26, 2022 - 11:00am-2:00pm, May 27, 2022 - 10:00am-1:00pm,
Thursday, May 26th, 2022 - h. 11.00am-2.00pm
Damage Mechanics. Isotropic and anisotropic damage models. Unilateral effect. Damage-plasticity models. Strain softening problems and regularization techniques. Structural examples.
Friday, May 27th, 2022 – h 10.00am-1.00pm
Mechanics of interfaces. Coupling of damage, unilateral contact and frictional effects. Phenomenon of the interlocking and dilatancy.