Probabilistic modelling and reconstruction of strain

Title: Probabilistic modelling and reconstruction of strain
Creator: Jidling, Carl; Hendriks, Johannes; Wahlström, Niklas; Gregg, Alexander; Schön, Thomas B.; Wensrich, Christopher; Wills, Adrian
Relation: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms Vol. 436, Issue 1 December 2018, p. 141-155
Publisher Link: http://dx.doi.org/10.1016/j.nimb.2018.08.051
Publisher: Elsevier
Resource Type: journal article
Date: 2018
Description: This paper deals with modelling and reconstruction of strain fields, relying upon data generated from neutron Bragg-edge measurements. We propose a probabilistic approach in which the strain field is modelled as a Gaussian process, assigned a covariance structure customised by incorporation of the so-called equilibrium constraints. The computational complexity is significantly reduced by utilising an approximation scheme well suited for the problem. We illustrate the method on simulations and real data. The results indicate a high potential and can hopefully inspire the concept of probabilistic modelling to be used within other tomographic applications as well.
Subject: strain field; Gaussian process; Bragg-edge; equilibrium constraints
Identifier: http://hdl.handle.net/1959.13/1415073
Identifier: uon:36856
Identifier: ISSN:0168-583X
Language: eng
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