Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/7531
Title: Stochastic uncertainty analysis of damage evolution computed through microstructure-property relations
Authors: Acar, Erdem
Solanki, Kiran N.
Rais-Rohani, Masoud
Horstemeyer, Mark F.
Keywords: Damage
Dimension reduction
Microstructure-property relations
Multiscale model
Uncertainty
Issue Date: 2010
Publisher: Elsevier Sci Ltd
Abstract: Uncertainties in material microstructure features can lead to uncertainty in damage predictions based on multiscale microstructure-property models. This paper presents an analytical approach for stochastic uncertainty analysis by using a univariate dimension reduction technique. This approach is used to analyze the effects of uncertainties pertaining to the structure-property relations of an internal state variable plasticity-damage model that predicts failure. The results indicate that the higher the strain the greater the scatter in damage, even when the uncertainties in the material plasticity and microstructure parameters are kept constant. In addition, the mathematical sensitivity analysis results related to damage uncertainty are consistent with the physical nature of damage progression. At the beginning, the initial porosity and void nucleation are shown to drive the damage evolution. Then, void coalescence becomes the dominant mechanism. And finally, when approaching closer to failure, fracture toughness is found to dominate the damage evolution process. (C) 2009 Elsevier Ltd. All rights reserved.
URI: https://doi.org/10.1016/j.probengmech.2009.11.001
https://hdl.handle.net/20.500.11851/7531
ISSN: 0266-8920
1878-4275
Appears in Collections:Makine Mühendisliği Bölümü / Department of Mechanical Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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