NDLI: The Influence of Loading History on the Reliability of Welded Structures

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Smith, David Muhammed, Amin
Copyright Year	2007
Abstract	The impact of prior loading on the structural performance of welded components is explored. In particular, probabilistic models are used to determine the change in the survival probability of a welded component where prior loading contributes to changes in both the fracture toughness and residual stresses. The effect of prior loading on toughness reveals that there are shifts in the mean toughness together with changes in the statistical distribution. While there is a large body of data that characterize residual stresses in welded components there is considerable uncertainty about the choice of the mean and statistical properties. Furthermore, there is only limited statistical evidence for changes in residual stress following prior loading. The evidence points to the adoption of a simple linear model to explain reductions in residual stress after prior loading. The combined experimental evidence for changes in toughness and residual stress are then incorporated into probabilistic models. The models are used to investigate the sensitivity of the input parameters to measures of the survivability of a welded component. Predictions are compared to experimental evidence from large scale tests. Importantly, it is revealed that by including prior loading into an assessment of the performance of a welded structure we may be able to claim that the structure’s reliability is consistently better than that expected at start of life.
Sponsorship	Ocean, Offshore and Arctic Engineering Division
Starting Page	203
Ending Page	212
Page Count	10
File Format	PDF
ISBN	0791842681
DOI	10.1115/OMAE2007-29303
e-ISBN	0791837998
Volume Number	Volume 2: Structures, Safety and Reliability; Petroleum Technology Symposium
Conference Proceedings	ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering
Language	English
Publisher Date	2007-06-10
Publisher Place	San Diego, California, USA
Access Restriction	Subscribed
Subject Keyword	Uncertainty Statistical distributions Probability Residual stresses Reliability Stress Fracture toughness
Content Type	Text
Resource Type	Article

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