- Title
- Neutron transmission strain tomography for non-constant stress-free lattice spacing
- Creator
- Hendriks, J. N.; Jidling, C.; Schön, T. B.; Wills, A.; Wensrich, C. M.; Kisi, E. H.
- Relation
- ARC.DP170102324 http://purl.org/au-research/grants/arc/DP170102324
- Relation
- Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms Vol. 456, Issue 1 October 2019, p. 64-73
- Publisher Link
- http://dx.doi.org/10.1016/j.nimb.2019.07.005
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2019
- Description
- Recently, several algorithms for strain tomography from energy-resolved neutron transmission measurements have been proposed. These methods assume that the stress-free lattice spacing d0 is a known constant limiting their application to the study of stresses generated by manufacturing and loading methods that do not alter this parameter. In this paper, we consider the more general problem of jointly reconstructing the strain and d0 fields. A method for solving this inherently non-linear problem is presented that ensures the estimated strain field satisfies equilibrium and can include knowledge of boundary conditions. This method is tested on a simulated data set with realistic noise levels, demonstrating that it is possible to jointly reconstruct d0 and the strain field.
- Subject
- strain tomography; neutron transmission; Gaussian processes
- Identifier
- http://hdl.handle.net/1959.13/1411559
- Identifier
- uon:36353
- Identifier
- ISSN:0168-583X
- Rights
- © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
- Language
- eng
- Full Text
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