- Title
- Bragg-edge neutron transmission strain tomography for in situ loadings
- Creator
- Wensrich, C. M.; Hendriks, J. N.; Gregg, A.; Meylan, M. H.; Luzin, V.; Tremsin, A. S.
- Relation
- ARC.130104290 http://purl.org/au-research/grants/arc/DP130104290
- Relation
- Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms Vol. 383, p. 52-58
- Publisher Link
- http://dx.doi.org/10.1016/j.nimb.2016.06.012
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2016
- Description
- An approach for tomographic reconstruction of three-dimensional strain distributions from Bragg-edge neutron transmission strain images is outlined and investigated. This algorithm is based on the link between Bragg-edge strain measurements and the Longitudinal Ray Transform, which has been shown to be sensitive only to boundary displacement. By exploiting this observation we provide a method for reconstructing boundary displacement from sets of Bragg-edge strain images. In the case where these displacements are strictly the result of externally applied tractions, corresponding internal strain fields can then be found through traditional linear-static finite element methods. This approach is tested on synthetic data in two-dimensions, where the rate of convergence in the presence of measurement noise and beam attenuation is examined.
- Subject
- strain tomography; Bragg-edge imaging; neutron diffraction; neutron transmission strain measurement
- Identifier
- http://hdl.handle.net/1959.13/1344715
- Identifier
- uon:29478
- Identifier
- ISSN:0168-583X
- Language
- eng
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