Journal ArticleDOI
Residual stress. Part 1 – Measurement techniques
TLDR
In this paper, the effect of residual stresses on fatigue lifetimes and structural integrity are first summarised, followed by the definition and measurement of residual stress, which are characterised according to the characteristic length scale over which they self-equilibrate.Abstract:
Residual stress is that which remains in a body that is stationary and at equilibrium with its surroundings. It can be very detrimental to the performance of a material or the life of a component. Alternatively, beneficial residual stresses can be introduced deliberately. Residual stresses are more difficult to predict than the in-service stresses on which they superimpose. For this reason, it is important to have reliable methods for the measurement of these stresses and to understand the level of information they can provide. In this paper, which is the first part of a two part overview, the effect of residual stresses on fatigue lifetimes and structural integrity are first summarised, followed by the definition and measurement of residual stresses. Different types of stress are characterised according to the characteristic length scale over which they self-equilibrate. By comparing this length to the gauge volume of each technique, the capability of a range of techniques is assessed. In the sec...read more
Citations
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Journal ArticleDOI
Measurement of residual stresses in polymeric parts by indentation method
TL;DR: In this article, an indentation method was used to measure the residual stresses in polymeric parts for practical applications, particularly for small or complicated parts, and the residual stress distribution was calculated by comparing the load-displacement curve results with respect to the indentation depth.
Journal ArticleDOI
On the interaction of microstructural morphology with residual stress in fiber laser welding of austenitic stainless steel
Bikash Kumar,Swarup Bag,S. Mahadevan,Christ P. Paul,Christ P. Paul,C.R. Das,Kushvinder S. Bindra,Kushvinder S. Bindra +7 more
TL;DR: In this paper, the microstructural interaction with the thermo-mechanical performance of Yb-Fiber laser-welded austenitic stainless steel (SS304) is evaluated at different heat inputs and varying defocus distances.
Journal ArticleDOI
Tunneling cracks in full scale wind turbine blade joints
TL;DR: In this article, the authors used a generic tunneling crack tool for the prediction of crack growth rates for tunneling cracks propagating across a bond-line in a wind turbine blade under high cyclic loadings.
Journal ArticleDOI
First-order correction to counter the effect of eccentricity on the hole-drilling integral method with strain-gage rosettes:
TL;DR: The offset between the hole and the center of the strain-gage rosette is unavoidable, although usually small, in the hole-drilling technique for residual stress evaluation as discussed by the authors, but it is not a significant offset in the case of a single hole.
Journal ArticleDOI
Mitigation of Sn Whisker Growth by Composite Ni/Sn Plating
TL;DR: In this paper, the influence of composite pulse electroplated nickel/tin (Ni/Sn) layering on the mitigation of Sn whisker growth was considered and the performance of the composite pulsed plating method was compared with two other plating procedures.
References
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Book
Elements of X-ray diffraction
TL;DR: In this article, the authors present a chemical analysis of X-ray diffraction by Xray Spectrometry and phase-diagram Determination of single crystal structures and phase diagrams.
Book
Encyclopedia of Materials: Science and Technology
K. H. Jürgen Buschow,Robert W. Cahn,Merton C. Flemings,Bernhard Ilschner,Edward J. Kramer,Subhash Mahajan +5 more
TL;DR: In this article, the fundamental core theory of functional properties and properties of materials are discussed. But the authors focus on the physical properties of thin films and artificial multilayers, rather than the structural properties of the materials themselves.
Journal ArticleDOI
Residual stress. Part 2 – Nature and origins
TL;DR: In this paper, the authors examine the nature and origins of residual stresses across a range of scales, from the long range residual stress fields in engineering components and welded structures, through the interphase stresses present in composites and coatings, to the microscale interactions of phase transformations with local stresses.
Book
Handbook of Measurement of Residual Stresses
TL;DR: In this paper, the authors describe a sequence of residual stress measurements made to determine a Handbook on Stiffness & Damping in Mechanical Design, which can be used to compare different methods of measuring residual stress.