A new a posteriori error indicator and its mesh optimization for nonlocal concrete damage models
| Autor: | Abdelouhab Medjahed, Patrice Coorevits, Abdelhamid Becheur |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Mesh optimization
Computer science Computation Aerospace Engineering Ocean Engineering 02 engineering and technology 01 natural sciences Least squares least squares smoothing 0203 mechanical engineering Convergence (routing) step mesh adaptation FE analysis -concrete- nonlocal damage General Materials Science 0101 mathematics Civil and Structural Engineering Mechanical Engineering Estimator Finite element method 010101 applied mathematics 020303 mechanical engineering & transports Mechanics of Materials Automotive Engineering error indicator A priori and a posteriori error convergence rate Algorithm Smoothing |
| Zdroj: | Latin American Journal of Solids and Structures v.15 n.9 2018 Latin American journal of solids and structures Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM) instacron:ABCM Latin American Journal of Solids and Structures, Volume: 15, Issue: 9, Article number: e104, Published: 27 AUG 2018 |
| ISSN: | 1679-7825 1679-7817 |
| Popis: | Damage models are often used in finite element simulations of concrete structures. Evaluating the numerical quality of these computations consists in an important task which can be performed by using an error estimator. However, in the framework of nonlocal approaches these estimators seem to be much less abundant in the literature and their implementation requires considerable efforts. In this paper, a new error indicator with relatively less difficulties for its implementation is proposed. Based on local and least squares smoothing techniques, the convergence analyses of the developed indicator is carried out and discussed. The obtained results seem to be in good agreement with those obtained by the use of residual method. In addition the major difficulty to obtain an automatic step-by-step mesh adaptation is highlighted. Nevertheless for a chosen loading step, optimized calculations can be performed and example tests are presented. |
| Databáze: | OpenAIRE |
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