A simplified multiscale model of degenerate graphite clusters in grey cast iron
| Autor: | Matteo Cova, Paolo Livieri, Raffaella Rizzoni, Roberto Tovo |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
PE8_9
effective elastic moduli Materials science Scale (ratio) PE8_8 02 engineering and technology engineering.material Defects cluster effective elastic moduli stress concentration factor NO Matrix (mathematics) 0203 mechanical engineering PE7_3 PE8_3 stress concentration factor Porosity Earth-Surface Processes Degenerate energy levels Isotropy Defects cluster Mechanics 021001 nanoscience & nanotechnology Microstructure Aspect ratio (image) 020303 mechanical engineering & transports engineering Cast iron 0210 nano-technology |
| Zdroj: | Procedia Structural Integrity. 24:625-635 |
| ISSN: | 2452-3216 |
| DOI: | 10.1016/j.prostr.2020.02.055 |
| Popis: | To take into account the weakening effect of defects clusters in real microstructures, we propose a multiscale model in a two-dimensional setting. At a small scale, single defects are described as elliptical voids randomly distributed and randomly oriented in an isotropic matrix. Using an effective field method proposed by Tandon and Weng [5,6], the effective properties of a porous equivalent material can be estimated in a simple closed form. At a larger scale, defects clusters are modelled as single large elliptical inclusions characterized by the weakened effective properties calculated in the first step and embedded in an infinite, elastic, isotropic matrix under remote loading. The method allows to examine the dependence of defects interaction on some basic microstructure parameters (porosity density, voids aspect ratio, inclusion aspect ratio). |
| Databáze: | OpenAIRE |
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