Tomographic reconstruction of residual strain in axisymmetric systems from Bragg-edge neutron imaging |
| |
| Affiliation: | 1. School of Engineering, The University of Newcastle, Callaghan, NSW 2308, Australia;2. School of Mathematical and Physical Sciences, The University of Newcastle, Callaghan, NSW 2308, Australia;1. Department of Industrial Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy;2. Department of Architecture and Industrial Design, University of Campania, Via San Lorenzo, 81031 Aversa, CE, Italy;3. Department of Structures for Engineering and Architecture, University of Naples Federico II, vina Claudio 21, 80125 Naples, Italy;1. School of Civil Engineering, Iran University of Science and Technology, Narmak, Tehran 16846, Iran;2. The Centre of Excellence for Fundamental Studies in Structural Engineering, Iran University of Science and Technology, Narmak, Tehran 16846, Iran;3. Department of Civil Engineering, Shahid Rajaee Teacher Training University, Lavizan, Tehran, Iran |
| |
| Abstract: | In this paper, we address the tomographic reconstruction of elastic strain fields from Bragg-edge measurements. The non-trivial null space of the Longitudinal Ray Transform lies at the heart of this problem, precluding direction inversion from measured data. We have approached this problem by considering the physical constraints of equilibrium through the minimisation of strain energy. Through this approach, a method is developed for axisymmetric systems that is capable of reconstructing residual strain fields. This algorithm has been demonstrated for two such fields, and is capable of rejecting simulated Gaussian measurement noise of the magnitude expected in experimental data. In contrast to previous algorithms for this class of system, a clear path to general application (i.e. arbitrary geometry) exists. |
| |
| Keywords: | Strain tomography Bragg-edge neutron transmission |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
