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The appropriateness of residual stress length scales in structural integrity

Bouchard, P. J. and Withers, P. J. (2004). The appropriateness of residual stress length scales in structural integrity. Journal of Neutron Research, 12(1) pp. 81–91.

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Residual stresses exist in most engineering components as a consequence of material processing and service history. It is well documented that such stresses can vary across a range of length scales and that different measurement techniques are sensitive to different components of the stress. Needless to say for reliable structural integrity assessment the residual stress field must be accurately quantified over the appropriate length scales. A classification system for sub-dividing residual macrostresses into long-, medium- and short-length scales is proposed to aid this process. A series of examples are presented that illustrate how the length scale for residual stress measurement and modelling studies should be determined in terms of the nature and size scale of the specific structural performance concern. The examples are related mainly to the residual stress field induced by a weld repair in a pipe that has been analysed by 3D finite element simulation techniques and measured by neutron diffraction.

Item Type: Journal Article
ISSN: 1023-8166
Keywords: neutron; synchrotron; diffraction; weld; cracking; fracture
Academic Unit/Department: Mathematics, Computing and Technology > Engineering & Innovation
Item ID: 15072
Depositing User: P. John Bouchard
Date Deposited: 17 Mar 2009 14:18
Last Modified: 02 Dec 2010 20:23
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