ADAPTIVE QUASICONTINUUM SIMULATION OF ELASTIC-BRITTLE DISORDERED LATTICES
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....
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Czech Technical University in Prague
2017-11-01
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| Series: | Acta Polytechnica CTU Proceedings |
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| Online Access: | https://ojs.cvut.cz/ojs/index.php/APP/article/view/4634 |
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| author | Karel Mikeš Milan Jirásek |
| author_facet | Karel Mikeš Milan Jirásek |
| author_sort | Karel Mikeš |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-84dbfb64ea17438d9d7b82fa8a5b93a4 |
| institution | Kabale University |
| issn | 2336-5382 |
| language | English |
| publishDate | 2017-11-01 |
| publisher | Czech Technical University in Prague |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj-art-84dbfb64ea17438d9d7b82fa8a5b93a42025-08-20T03:34:53ZengCzech Technical University in PragueActa Polytechnica CTU Proceedings2336-53822017-11-01130808410.14311/APP.2017.13.00804000ADAPTIVE QUASICONTINUUM SIMULATION OF ELASTIC-BRITTLE DISORDERED LATTICESKarel Mikeš0Milan Jirásek1Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague 6, Czech RepublicCzech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague 6, Czech RepublicThe 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.https://ojs.cvut.cz/ojs/index.php/APP/article/view/4634quasicontinuum method, adaptive crack propagation, elastic-brittle lattice model |
| spellingShingle | Karel Mikeš Milan Jirásek ADAPTIVE QUASICONTINUUM SIMULATION OF ELASTIC-BRITTLE DISORDERED LATTICES Acta Polytechnica CTU Proceedings quasicontinuum method, adaptive crack propagation, elastic-brittle lattice model |
| title | ADAPTIVE QUASICONTINUUM SIMULATION OF ELASTIC-BRITTLE DISORDERED LATTICES |
| title_full | ADAPTIVE QUASICONTINUUM SIMULATION OF ELASTIC-BRITTLE DISORDERED LATTICES |
| title_fullStr | ADAPTIVE QUASICONTINUUM SIMULATION OF ELASTIC-BRITTLE DISORDERED LATTICES |
| title_full_unstemmed | ADAPTIVE QUASICONTINUUM SIMULATION OF ELASTIC-BRITTLE DISORDERED LATTICES |
| title_short | ADAPTIVE QUASICONTINUUM SIMULATION OF ELASTIC-BRITTLE DISORDERED LATTICES |
| title_sort | adaptive quasicontinuum simulation of elastic brittle disordered lattices |
| topic | quasicontinuum method, adaptive crack propagation, elastic-brittle lattice model |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/4634 |
| work_keys_str_mv | AT karelmikes adaptivequasicontinuumsimulationofelasticbrittledisorderedlattices AT milanjirasek adaptivequasicontinuumsimulationofelasticbrittledisorderedlattices |