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Quasistatic crack growth in 2d-linearized elasticity (1604.08338v5)

Published 28 Apr 2016 in math.AP and cond-mat.mtrl-sci

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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