Reshaping the testing pyramid: utilisation of data-rich NDT techniques as a Means to Develop a ‘High Fidelity’ Component and Sub-structure Testing Methodology for Composites

David J Bull, Janice M Dulieu-Barton, Ole T Thomsen, Richard Butler, Andrew Rhead, Timothy Fletcher, Kevin Potter, Robert A Smith

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A key issue in the certification of composite structures is the heavy reliance on ‘coupon level’ tests that do not always translate well to the sub-structure, component and full scale structural behaviour within a ‘building block’ or ‘testing pyramid’ framework. This has a strong bearing on the certification process as many of the design allowables and failure predictions are determined from the behaviour of coupon specimens. The overarching aim of this work is to develop an understanding into the behaviour of composites at the larger sub-component scales, which better represent the in-service behaviour of these structures, reducing the reliance on extensive coupon level testing. This requires non-destructive testing (NDT) methods that are scalable to large components. This study investigates the feasibilities of Thermoelastic Stress Analysis (TSA) and Digital Image Correlation (DIC) as scalable strain based NDT methods that provide full-field information to study the effects of defects on structural composite components. Both techniques are successfully demonstrated showing their capability for detecting the detrimental effects of fibre waviness (wrinkles) on a thick non-generic composite component. X-ray computed tomography (CT) is used to validate the observations made with the two strain based NDT techniques.
Original languageEnglish
Title of host publication21st International Conference for Composite Materials
Place of PublicationXi'an
Number of pages10
Publication statusPublished - Aug 2017

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Nondestructive examination
Composite materials
Testing
Composite structures
Stress analysis
Tomography
X rays
Defects
Fibers

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Bull, D. J., Dulieu-Barton, J. M., Thomsen, O. T., Butler, R., Rhead, A., Fletcher, T., ... Smith, R. A. (2017). Reshaping the testing pyramid: utilisation of data-rich NDT techniques as a Means to Develop a ‘High Fidelity’ Component and Sub-structure Testing Methodology for Composites. In 21st International Conference for Composite Materials [2090] Xi'an.

Reshaping the testing pyramid: utilisation of data-rich NDT techniques as a Means to Develop a ‘High Fidelity’ Component and Sub-structure Testing Methodology for Composites. / Bull, David J; Dulieu-Barton, Janice M; Thomsen, Ole T; Butler, Richard; Rhead, Andrew; Fletcher, Timothy; Potter, Kevin; Smith, Robert A.

21st International Conference for Composite Materials. Xi'an, 2017. 2090.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Bull, DJ, Dulieu-Barton, JM, Thomsen, OT, Butler, R, Rhead, A, Fletcher, T, Potter, K & Smith, RA 2017, Reshaping the testing pyramid: utilisation of data-rich NDT techniques as a Means to Develop a ‘High Fidelity’ Component and Sub-structure Testing Methodology for Composites. in 21st International Conference for Composite Materials., 2090, Xi'an.
Bull DJ, Dulieu-Barton JM, Thomsen OT, Butler R, Rhead A, Fletcher T et al. Reshaping the testing pyramid: utilisation of data-rich NDT techniques as a Means to Develop a ‘High Fidelity’ Component and Sub-structure Testing Methodology for Composites. In 21st International Conference for Composite Materials. Xi'an. 2017. 2090
Bull, David J ; Dulieu-Barton, Janice M ; Thomsen, Ole T ; Butler, Richard ; Rhead, Andrew ; Fletcher, Timothy ; Potter, Kevin ; Smith, Robert A. / Reshaping the testing pyramid: utilisation of data-rich NDT techniques as a Means to Develop a ‘High Fidelity’ Component and Sub-structure Testing Methodology for Composites. 21st International Conference for Composite Materials. Xi'an, 2017.
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