Evaluation of residual stresses and strains using the Eigenstrain Reconstruction Method
By T. Jun, A. Korsunsky. 2010
159 citations recorded by the source corpus.
The study of residual stress has long been an important research field in science and engineering, due to the fact that uncontrolled residual stresses are detrimental to the performance of products. Numerous research contributions have been devoted to the quantification of residual stress states for the purpose of designing engineering components and predicting their lifetime and failure in service. For the purposes of the present study these can be broadly classified into two main approaches, namely, the interpretation of experimental measurements and process modelling. In this paper, a novel approach to residual stress analysis is developed, called here the Eigenstrain Reconstruction Method (ERM). This is a semi-empirical approach that combines experimental characterisation, specifically, residual elastic strain measurement by diffraction, with subsequent analysis and interpretation based on the eigenstrain theory. Three essential components of the ERM, i.e. the residual strain measurement, the solution of the inverse problem of eigenstrain theory, and the Simple Triangle (SIMTRI) method, are described. The ERM allows an approximate reconstruction of the complete residual strain and stress state in the entire engineering component. This is a significant improvement compared to the experimentally obtained limited knowledge of stress components at a selected number of measurement points, or to the simple interpolation between these points.
Subfields: Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/2918270f1ce860fab18d91e287e0658a39c92bf0
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In Mechanical Engineering
Citations in the corpus
- Residual stress evaluation in selective-laser-melting additively manufactured titanium (Ti-6Al-4V) and inconel 718 using the contour method and numerical simulation (2018, methodology): “The term eigenstrain, on the other hand, is used in [21] for the more general mathematical construct of Mura [22] and especially Korsunsky [23].”
- A smoothed inverse eigenstrain method for reconstruction of the regularized residual fields (2014, unknown): “The residual stresses in engineering structures are generally determined by interpretation of experimental measurements or process modeling where major limitations exist in both approaches (Jun and Korsunsky, 2010).”