Calculus of Variations and Geometric Measure Theory
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M. Friedrich - F. Solombrino

Quasistatic crack growth in 2d-linearized elasticity

created by friedrich on 06 May 2016
modified by solombrin on 18 Mar 2017

[BibTeX]

Accepted Paper

Inserted: 6 may 2016
Last Updated: 18 mar 2017

Journal: Annales de l'Institut Henri Poincaré (C) Analyse Non Linéaire
Year: 2017
Doi: 10.1016/j.anihpc.2017.03.002

Abstract:

In this paper we prove a two-dimensional existence result for a variational model of crack growth for brittle materials in the realm of linearized elasticity. Starting with a time-discretized version of the evolution driven by a prescribed boundary load, we derive a time-continuous quasistatic crack growth in the framework of generalized special functions of bounded deformation ($GSBD$). As the time-discretization step tends to $0$, the major difficulty lies in showing the stability of the static equilibrium condition, which is achieved by means of a Jump Transfer Lemma generalizing the result of Francfort and Larsen (Comm. Pure Appl. Math., 56 (2003), 1465--1500) to the $GSBD$ setting. Moreover, we present a general compactness theorem for this framework and prove existence of the evolution without the necessity of a-priori bounds on the displacements or applied body forces.


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