Open AccessADAPTIVE QUASICONTINUUM SIMULATION OF ELASTIC-BRITTLE DISORDERED LATTICES
Author(s) -
Karel Mikeš,
Milan Jirásek
Publication year - 2017
Publication title -
acta polytechnica ctu proceedings
Language(s) - English
Resource type - Journals
ISSN - 2336-5382
DOI - 10.14311/app.2017.13.0080
Subject(s) - brittleness , displacement (psychology) , reduction (mathematics) , statistical physics , work (physics) , materials science , molecular dynamics , particle method , mechanics , computer science , physics , mathematics , mathematical analysis , geometry , thermodynamics , composite material , psychology , psychotherapist , quantum mechanics , boundary value problem
The quasicontinuum (QC) method is a computational technique that can efficiently handle atomistic lattices by combining continuum and atomistic approaches. In this work, the QC method is combined with an adaptive algorithm, to obtain correct predictions of crack trajectories in failure simulations. Numerical simulations of crack propagation in elastic-brittle disordered lattices are performed for a two-dimensional example. The obtained results are compared with the fully resolved particle model. It is shown that the adaptive QC simulation provides a significant reduction of the computational demand. At the same time, the macroscopic crack trajectories and the shape of the force-displacement diagram are very well captured.