0
Materials Technology

Corrosion Effects on Reliability of Flat Plates in Tension

[+] Author and Article Information
Weiwei Yu1

Chevron Energy Technology Company, Houston, TX, 77002weiwei.yu@chevron.com

Dale G. Karr2

 University of Michigan, Ann Arbor, MI, 48109dgkarr@umich.edu

Pedro M. Vargas

Chevron Technology Company, Houston, TX, 77002pedrovargas@chevron.com

1

Address all correspondence related to ASME style format and figures to this author.

2

Address all correspondence for other issues to this author.

J. Offshore Mech. Arct. Eng 134(2), 021404 (Dec 06, 2011) (7 pages) doi:10.1115/1.4004520 History: Received July 01, 2010; Revised March 26, 2011; Published December 06, 2011; Online December 06, 2011

Neuber’s theory of elastic and inelastic stress concentration factors are applied to the pit corrosion of plates. The finite element method is then employed to model the problem numerically and to calculate the stress concentration factors for semioblate spheroidal pits. Furthermore, corrosion development is a process with many random factors such as the geometry and the growth rate. A realistic reflection of corrosion effects on structural failure is to consider it within the framework of reliability analysis. By knowing the analytical formula of stress concentration factor, reliability analyses are conducted to calculate the reliability safety index of the panel based on a strain-based limit state. The structural failure can then be directly related to the reliability safety index. The reliability procedure is demonstrated in an example of a highly deformed bottom shell panel during ship grounding. Partial safety factors of two random variables which describe pit corrosion geometry and the effective nominal strain level are also calculated. Recommendations for using partial safety factors are provided.

FIGURES IN THIS ARTICLE
<>
Copyright © 2012 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Applying Neuber’s theory on notched specimen under uniaxial loading

Grahic Jump Location
Figure 2

Notched specimen

Grahic Jump Location
Figure 3

FE Notched specimen

Grahic Jump Location
Figure 4

Meshing sensitivity analyses of both 3D and 2D models

Grahic Jump Location
Figure 5

Maximum axial stress at the notch root predicted by analytical and FE methods

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In