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Proceedings Paper

Electronic speckle pattern interferometry for fracture expansion in nuclear graphite based on PDE image processing methods
Author(s): Chen Tang; Junjiang Zhang; Chen Sun; Yonggang Su; Kai Leung Su
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Paper Abstract

Nuclear graphite has been widely used as moderating and reflecting materials. However, due to severe neutron irradiation under high temperature, nuclear graphite is prone to deteriorate, resulting in massive microscopic flaws and even cracks under large stress in the later period of its service life. It is indispensable, therefore, to understand the fracture behavior of nuclear graphite to provide reference to structural integrity and safety analysis of nuclear graphite members in reactors. In this paper, we investigated the fracture expansion in nuclear graphite based on PDE image processing methods. We used the second-order oriented partial differential equations filtering model (SOOPDE) to denoise speckle noise, then used the oriented gradient vector fields for to obtain skeletons. The full-field displacement of fractured nuclear graphite and the location of the crack tip were lastly measured under various loading conditions.

Paper Details

Date Published: 22 June 2015
PDF: 8 pages
Proc. SPIE 9525, Optical Measurement Systems for Industrial Inspection IX, 95252Y (22 June 2015);
Show Author Affiliations
Chen Tang, Tianjin Univ. (China)
Junjiang Zhang, Tianjin Univ. (China)
Chen Sun, Tianjin Univ. (China)
Yonggang Su, Tianjin Univ. (China)
Kai Leung Su, The Univ. of Hong Kong (Hong Kong, China)

Published in SPIE Proceedings Vol. 9525:
Optical Measurement Systems for Industrial Inspection IX
Peter Lehmann; Wolfgang Osten; Armando Albertazzi Gonçalves Jr., Editor(s)

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