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Title: Optimization of ultrasonic array inspections using an efficient hybrid model and real crack shapes

Models which simulate the interaction of ultrasound with cracks can be used to optimize ultrasonic array inspections, but this approach can be time-consuming. To overcome this issue an efficient hybrid model is implemented which includes a finite element method that requires only a single layer of elements around the crack shape. Scattering Matrices are used to capture the scattering behavior of the individual cracks and a discussion on the angular degrees of freedom of elastodynamic scatterers is included. Real crack shapes are obtained from X-ray Computed Tomography images of cracked parts and these shapes are inputted into the hybrid model. The effect of using real crack shapes instead of straight notch shapes is demonstrated. An array optimization methodology which incorporates the hybrid model, an approximate single-scattering relative noise model and the real crack shapes is then described.
Authors:
 [1] ; ;  [2] ; ;  [3]
  1. Department of Mechanical Engineering, University of Bristol, Bristol, U.K. and NDE Laboratory, Rolls-Royce plc., Bristol (United Kingdom)
  2. Department of Mechanical Engineering, University of Bristol, Bristol (United Kingdom)
  3. NDE Laboratory, Rolls-Royce plc., Bristol (United Kingdom)
Publication Date:
OSTI Identifier:
22391271
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1650; Journal Issue: 1; Conference: 41. Annual Review of Progress in Quantitative Nondestructive Evaluation, Boise, ID (United States), 20-25 Jul 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; APPROXIMATIONS; COMPUTERIZED TOMOGRAPHY; CRACKS; DEGREES OF FREEDOM; FINITE ELEMENT METHOD; INSPECTION; MATHEMATICAL MODELS; NOISE; OPTIMIZATION; S MATRIX; SCATTERING; ULTRASONIC TESTING