@article {2018,
title = {Energy-dissipation balance of a smooth moving crack},
number = {SISSA;31/2018/MATE},
year = {2018},
abstract = {In this paper we provide necessary and sufficient conditions in order to guarantee the energy-dissipation balance of a Mode III crack, growing on a prescribed smooth path. Moreover, we characterize the singularity of the displacement near the crack tip, generalizing the
result in [S. Nicaise, A.M. Sandig - J. Math. Anal. Appl., 2007] valid for straight fractures.},
url = {http://preprints.sissa.it/handle/1963/35320},
author = {Maicol Caponi and Ilaria Lucardesi and Emanuele Tasso}
}
@article {2016,
title = {Confinement of dislocations inside a crystal with a prescribed external strain},
year = {2016},
note = {Preprint SISSA 20/2016/MATE},
abstract = {We study screw dislocations in an isotropic crystal undergoing antiplane shear.
In the framework of linear elasticity, by fixing a suitable boundary condition for the strain
(prescribed non-vanishing boundary integral), we manage to confine the dislocations inside the material. More precisely, in the presence of an external strain with circulation equal to n times the lattice spacing, it is energetically convenient to have n distinct dislocations lying inside the crystal. The novelty of introducing a Dirichlet boundary condition for the tangential strain is crucial to the confinement: it is well known that, if Neumann boundary conditions are imposed, the dislocations tend to migrate to the boundary. The results are achieved using PDE techniques and Ƭ-convergence theory, in the framework of the so-called core radius approach.},
url = {http://urania.sissa.it/xmlui/handle/1963/35247},
author = {Ilaria Lucardesi and Marco Morandotti and Riccardo Scala and Davide Zucco}
}
@article {2015,
title = {The wave equation on domains with cracks growing on a prescribed path: existence, uniqueness, and continuous dependence on the data},
number = {SISSA;47/2015/MATE},
year = {2015},
abstract = {Given a bounded open set $\Omega \subset \mathbb R^d$ with Lipschitz boundary and an increasing family $\Gamma_t$, $t\in [0,T]$, of closed subsets of $\Omega$, we analyze the scalar wave equation $\ddot{u} - div (A \nabla u) = f$ in the time varying cracked domains $\Omega\setminus\Gamma_t$. Here we assume that the sets $\Gamma_t$ are contained into a prescribed $(d-1)$-manifold of class $C^2$.
Our approach relies on a change of variables: recasting the problem on
the reference configuration $\Omega\setminus \Gamma_0$, we are led to
consider a hyperbolic problem of the form $\ddot{v} - div (B\nabla v) + a \cdot \nabla v - 2 b \cdot \nabla \dot{v} = g$ in $\Omega \setminus \Gamma_0$. Under suitable assumptions on the regularity of the change of variables that transforms $\Omega\setminus \Gamma_t$ into $\Omega\setminus \Gamma_0$, we prove existence and uniqueness of weak solutions for both formulations. Moreover, we provide an energy equality, which gives, as a by-product, the continuous dependence of the solutions with respect to the cracks.},
url = {http://urania.sissa.it/xmlui/handle/1963/34629},
author = {Gianni Dal Maso and Ilaria Lucardesi}
}