In-situ mechanical properties identification of 3D particulate composites using the Virtual Fields Method
| Autor: | B. Rahmani, Isabelle Villemure, Martin Lévesque, Elias Ghossein |
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| Rok vydání: | 2014 |
| Předmět: |
In situ
Materials science Mechanical properties identification Mechanical Engineering Applied Mathematics Mechanical engineering Magnification Particulate composites Condensed Matter Physics Homogenization (chemistry) Materials Science(all) Region of interest Robustness (computer science) Mechanics of Materials Modeling and Simulation Modelling and Simulation Full-field measurements A priori and a posteriori General Materials Science Virtual Fields Method Composite material |
| Zdroj: | International Journal of Solids and Structures. 51(18):3076-3086 |
| ISSN: | 0020-7683 |
| DOI: | 10.1016/j.ijsolstr.2014.05.006 |
| Popis: | This paper presents an identification procedure based on the Virtual Fields Method (VFM) for identifying in situ mechanical properties of composite materials constitutive phases from 3D full-field measurements. The new procedure, called the Regularized Virtual Fields Method (RVFM), improves the accuracy of the VFM thanks to the imposition of mechanical constraints derived from an appropriate homogenization model. The developed algorithms were validated through virtual experiments on particulate composites. The robustness of both the VFM and the RVFM was assessed in the presence of noisy strain data for various microstructures. A study was also carried out to investigate the influence of the size of region of interests on the reliability of the identified parameters. Accordingly, the optimum size of region of interest was determined based on full-field measurement requirements and accuracy of the identified parameters. This study enables determining, a priori, the required magnification level of 3D images for composites of any mechanical and morphological characteristics. |
| Databáze: | OpenAIRE |
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