Computational measurements of stress fields from digital images
| Autor: | Julien Réthoré, Erwan Verron, Adrien Leygue, Michel Coret, Laurent Stainier |
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| Rok vydání: | 2017 |
| Předmět: |
Coupling
Numerical Analysis Digital image correlation Computer science Applied Mathematics Constitutive equation General Engineering 02 engineering and technology 01 natural sciences Displacement (vector) 010101 applied mathematics Stress (mechanics) Digital image 020303 mechanical engineering & transports 0203 mechanical engineering Displacement field Statistical physics 0101 mathematics Parametric statistics |
| Zdroj: | International Journal for Numerical Methods in Engineering. 113:1810-1826 |
| ISSN: | 0029-5981 |
| DOI: | 10.1002/nme.5721 |
| Popis: | Since the pioneering works on digital image correlation, a huge effort has been devoted to the elaboration of strategies coupling measurements with numerical simulations. The main issue achieved with such coupling is the identification of constitutive law parameters from experimental configurations yielding heterogeneous strain/stress fields. The main limitation of this framework is that a constitutive law is to be postulated, what sometimes reveals far from being straightforward. To circumvent this limitation, a methodology is proposed to build a parametric description not only of the displacement field for digital image correlation but also of the local stress. With no assumption on the constitutive relation, the method allows for estimating displacement, strain, and stress fields. The ability of the method is illustrated for different situations. |
| Databáze: | OpenAIRE |
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