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An FFT solver used for virtual Dynamic Mechanical Analysis experiments: Application to a glassy/amorphous system and to a particulate composite
- Source :
- Journal of Theoretical, Computational and Applied Mechanics (2021)
- Publication Year :
- 2021
- Publisher :
- INRIA, 2021.
-
Abstract
- FFT-based solvers are increasingly used by many researcher groups interested in modelling the mechanical behavior associated to a heterogeneous microstructure. A development is reported here that concerns the viscoelastic behavior of composite structures generally studied experimentally through Dynamic Mechanical Analysis (DMA). A parallelized computation code developed with complex-valued quantities provides virtual DMA experiments directly in the frequency domain on a heterogeneous system described by a voxel grid of mechanical properties. The achieved precision and computation times are very good. An effort has been made to illustrate the application of such a virtual DMA tool through two examples from the literature: the modelling of glassy/amorphous systems at a small scale and the modelling of experimental data obtained in temperature sweeping mode by DMA on a particulate composite made of glass beads and a polystyrene matrix, at a larger scale. Both examples show how virtual DMA can contribute to question, analyze, and understand relaxation phenomena on either theoretical or experimental points of view.
Details
- Language :
- English
- ISSN :
- 27266141
- Database :
- Directory of Open Access Journals
- Journal :
- Journal of Theoretical, Computational and Applied Mechanics
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.928c326754c84552a0ded2078e45c901
- Document Type :
- article
- Full Text :
- https://doi.org/10.46298/jtcam.6450