A Micromechanically-motivated Phenomenological Model for Predicting Ductile Fracture Initiation
| Autor: | Pedro Malaquias Araujo Stemler, Yong Zang, Xiao Long Li, Lei Mu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Coalescence (physics)
Void (astronomy) Materials science Stress space Astrophysics::Cosmology and Extragalactic Astrophysics 02 engineering and technology General Medicine Mechanics Plasticity 021001 nanoscience & nanotechnology 020303 mechanical engineering & transports 0203 mechanical engineering Phenomenological model Limit state design Elongation 0210 nano-technology Parametric statistics |
| Zdroj: | Procedia Engineering. 207:2054-2059 |
| ISSN: | 1877-7058 |
| DOI: | 10.1016/j.proeng.2017.10.1062 |
| Popis: | A phenomenological ductile fracture initiation model is developed based on the assumption that onset of fracture is a limit state of void evolution followed by void coalescence at microscopic level. In the model, void grows in two typical deformation modes: a) void dilation and b) void elongation/rotation. The fracture initiation model is transformed from stress space into the space of equivalent plastic strain, stress triaxiality and Lode parameter. A parametric study is carried out to better understand the effects of model parameters. The comparison with the experimental data (DP590, TRIP690, 5083-O aluminum alloy) shows a good prediction capability of the proposed model in a large range of stress state for various materials. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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