An Experimental Procedure to Determine the Interaction between Applied Loads and Residual Stresses

Abstract:

This paper presents a novel experiment to quantify both the initial residual stress state in a specimen and its redistribution due to plasticity induced by in-situ loading. The rate of relaxation of the residual stress with respect to permanent deformation is a measure of the elastic follow-up associated with the residual stress field. Residual stress measurements were made using high energy dispersive X-ray diffraction. Digital image correlation, verified by strain gauges, was used to measure full-field deformation on the specimen. The specimen was loaded and unloaded in-situ incrementally to promote plasticity, allowing the relaxation rate of the residual stress to be quantified. An elastic follow-up factor was calculated for the residual stress field, that indicated loading conditions of the residual stress field between fixed-displacement and fixed-load.

• Periodical: Materials Science Forum (Volumes 768-769)
• Pages: 733-740
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.768-769.733
• Online since: September 2013
• Authors: Greame Horne, Matthew J. Peel, Danie G. Hattingh, Thomas Connolley, Michael Hart, Joe Kelleher, Shu Yan Zhang, David John Smith
• Keywords: Elastic Follow-Up, Primary Stress, Residual Stress Redistribution, Secondary Stress

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