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Lookup NU author(s): Professor Gui Yun TianORCiD,
Dr Bin Gao,
Dr Liang Cheng
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Carbon fibre reinforced plastic (CFRP) has been widely used in industry. In order to detect and evaluate impact damage defects within this material, a non-destructive testing and evaluation (NDT&E) method of eddy current pulsed thermography (ECPT) is proposed. The idea of divergence characterisation of the expansion (or contraction) rate of the object and fluid volume can be extended to the thermal pattern characterisation of ECPT. This paper enables the extraction of this value of divergence at an appropriate time period to yield several desirable properties unique to NDT&E problems. The relationship between divergence and transient thermal patterns, as well as divergence and impact energy, are provided and analysed. The positive and negative values of the divergence and their relationship between composite structures and material state are investigated. Quantitative non-destructive evaluation (QNDE) of impact damage with ECPT from divergence patterns and image areas is derived. The results of this proposed method illustrate that defect areas are highly affected by impact energies. This proposed work can be applied for impact damage detection and quantitative evaluation in CFRP, which can be further used in life-cycle assessment and condition based maintenance. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.
Author(s): Ren WW, Liu J, Tian GY, Gao B, Cheng L, Yang HL
Publication type: Article
Publication status: Published
Journal: Composites Part B: Engineering
Print publication date: 14/05/2013
ISSN (print): 1359-8368
ISSN (electronic): 1879-1069
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