Adaptive and off-line techniques for non-linear multiscale analysis
| Autor: | Massimo Petracca, Xavier Martinez, Stefano Zaghi, Riccardo Rossi |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria Nàutiques, Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental, Universitat Politècnica de Catalunya. RMEE - Grup de Resistència de Materials i Estructures en l'Enginyeria |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Surface (mathematics)
Multiscale Optimization Engineering Civil Computer science Multiphysics Engineering Multidisciplinary 02 engineering and technology 01 natural sciences Matemàtiques i estadística::Anàlisi numèrica [Àrees temàtiques de la UPC] 0203 mechanical engineering Point (geometry) Engineering Ocean 0101 mathematics Engineering Aerospace Engineering Biomedical Microscale chemistry Civil and Structural Engineering Anàlisi numèrica Computer Science Software Engineering Engineering Marine 010101 applied mathematics Engineering Manufacturing Engineering Mechanical Nonlinear system Range (mathematics) 020303 mechanical engineering & transports Engineering Industrial Ceramics and Composites Representative elementary volume Algorithm Interpolation Numerical analysis |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Recercat. Dipósit de la Recerca de Catalunya instname Scipedia Open Access Scipedia SL |
| Popis: | This paper presents two procedures, based on the numerical multiscale theory, developed to predict the mechanical non-linear response of composite materials under monotonically increasing loads. Such procedures are designed with the objective of reducing the computational cost required in these types of analysis. Starting from virtual tests of the microscale, the solution of the macroscale structure via Classical First-Order Multiscale Method will be replaced by an interpolation of a discrete number of homogenized surfaces previously calculated. These surfaces describe the stress evolution of the microscale at fixed levels of an equivalent damage parameter ( d eq ). The information required for these surfaces to conduct the analysis is stored in a Data Base using a json format. Of the two methods developed, the first one uses the pre-computed homogenized surface just to obtain the material non-linear threshold, and generates a Representative Volume Element (RVE) once the material point goes into the nonlinear range; the second method is completely off-line and is capable of describing the material linear and non-linear behavior just by using the discrete homogenized surfaces stored in the Data Base. After describing the two procedures developed, this manuscript provides two examples to validate the capabilities of the proposed methods. |
| Databáze: | OpenAIRE |
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