Micro-Modelling Approach to Predict the Influence of Hydrogen Pressure on Short Crack Behaviour - Modeling and Numerical Simulation of Material Science

MNSMS > Vol.3 No.3, July 2013

Modeling and Numerical Simulation of Material Science

Volume 3, Issue 3 (July 2013)

ISSN Print: 2164-5345 ISSN Online: 2164-5353

Google-based Impact Factor: 0.7 Citations

Micro-Modelling Approach to Predict the Influence of Hydrogen Pressure on Short Crack Behaviour ()

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Download as PDF (Size: 554KB) PP. 37-40

DOI: 10.4236/mnsms.2013.33A006 2,729 Downloads 4,621 Views

Author(s)

Claude Lincourt, Jacques Lanteigne, Madhavarao Krishnadev, Carl Blais

Affiliation(s)

Department of Mining, Metallurgical and Materials Engineering, Laval University, Quebec, Canada.
Hydro-Quebec Research Institute, Varennes, Canada.
UTC Pratt & Whitney Canada, Longueuil, Canada.

ABSTRACT

A micromechanical model, based on the FEA (finite element analysis), was developed to estimate the influence of hydrogen pressure on short crack behaviour. Morphology of voids has important connotations in the development of the model. Stress intensity factor was calculated for different crack geometries under hydrogen pressure. The analysis indicates that the form factor of a crack emerging from a round void will be less affected by trapped hydrogen pressure-compared to an elongated void. This analysis reinforces the beneficial effect of inclusion shape control in reducing significantly the detrimental effect of hydrogen.

KEYWORDS

Hydrogen; Toughness; Finite Element Analysis; Modelling; Characteristic Length; Fracture Stress

Share and Cite:

Lincourt, C. , Lanteigne, J. , Krishnadev, M. and Blais, C. (2013) Micro-Modelling Approach to Predict the Influence of Hydrogen Pressure on Short Crack Behaviour. Modeling and Numerical Simulation of Material Science, 3, 37-40. doi: 10.4236/mnsms.2013.33A006.

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