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Groves, R.M. (author), Pradarutti, B. (author), Kouloumpi, E. (author), Osten, W. (author), Notni, G. (author)Cultural heritage objects are increasingly being investigated using advanced non-destructive optical measurement techniques. Holographic and speckle interferometry based instrumentation allow dimensional measurement of objects at the tens of nanometer scale. For the structural diagnostics of artwork, double-exposure techniques are often used to...conference paper 2009
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Anisimov, A. (author), Muller, B. (author), Sinke, J. (author), Groves, R.M. (author)The development of smart materials for embedding in aerospace composites provides enhanced functionality for future aircraft structures. Critical flight conditions like icing of the leading edges can affect the aircraft functionality and controllability. Hence, anti-icing and de-icing capabilities are used. In case of leading edges made of fibre...conference paper 2015
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Tapeinos, I. (author), Koussios, S. (author), Groves, R.M. (author)This paper outlines the structural performance of a conformable pressurizable tank consisting of intersecting spherical shells (multi-cell tank). Multi-cell tanks outrival conventional multiple cylindrical tanks in volumetric efficiency when required to fit in a rectangular envelope in the automotive industry. When pressurized, the multi-cell ...conference paper 2015
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Dingemans, L.M. (author), Papadakis, V. (author), Liu, P. (author), Adam, A.J.L. (author), Groves, R.M. (author)Optical coherence tomography (OCT) is a contactless and non-destructive testing (NDT) technique based on lowcoherence interferometry. It has recently become a popular NDT-tool for evaluating cultural heritage. In this study, protective coatings on wood and their penetration into the wood structure were measured with a customized infrared fiber...conference paper 2015
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Goto, D.T. (author), Groves, R.M. (author)This paper is concerned with the development of a calibrated 3D shearography strain measurement instrument, calibrated iteratively, using a combined mechanical-optical model and specially designed test objects. The test objects are a cylinder loaded by internal pressure and a flat plate under axial load. Finite element models of the samples,...conference paper 2010
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Krutul, E.C. (author), Groves, R.M. (author)This paper is concerned with the modelling of the complete opto-mechanical measurement system, including shearography instrument, loading technique and the response of the object under test and the comparison of the simulation results with experimental results. To show the applicability of this technique, the response of an aluminium flat plate...conference paper 2011
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Miesen, N. (author), Mizutani, Y. (author), Groves, R.M. (author), Sinke, J. (author), Benedictus, R. (author)This paper demonstrates that existing Structural Health Monitoring (SHM) techniques have potential during the production phase in addition to their application for maintenance and for in-flight monitoring. Flaws occur during composite fabrication in industry, due to an imperfect process control and human errors. This decreases production...conference paper 2011
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Boer, R.J. (author), Pelt, M. (author), Schoemaker, C. (author), Borst, M. (author), Groves, R.M. (author)The development of large commercial aircraft such as the Airbus A350 and the Boeing 787, together with military aircraft such as the Lockheed Martin F35, with a large share of composite components of up to 50%, make it necessary for attention to be focussed on the development of new and effective maintenance strategies. In this paper, we address...conference paper 2015
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Ochoa, P. (author), Groves, R.M. (author), Benedictus, R. (author)Ultrasonic Lamb wave techniques are described as one of the most encouraging developments for structural health monitoring of aerospace composite structures. The reliability of those techniques is highly dependent on the quality of signal processing algorithms capable of extracting useful information out of complex responses. When damage...conference paper 2015
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Liu, P. (author), Yao, L. (author), Groves, R.M. (author)Optical coherence tomography (OCT) is a non-invasive imaging method, which allows the econstruction of three dimensional depth-resolved images with microscale resolution. Originally developed for biomedical diagnostics, nowadays it also shows a high potential for applications in the field of non-destructive testing (NDT). This work demonstrates...conference paper 2015
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Goto, D.T. (author), Groves, R.M. (author)This paper describes the development of an opto-mechanical simulation of a complete shearography system, including the shearography instrument, the samples and the test environment. This simulation is applied to the measurement of 3D strains in engineering samples. The samples are a cylinder loaded by internal pressure and a flat plate under...conference paper 2010
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Groves, R.M. (author), Ameng, L. (author), Xiaoli, L. (author), Hackney, S. (author), Peng, X. (author), Osten, W. (author)Advanced measurement techniques for the structural diagnostics of artwork are increasingly providing more complex data that needs to be conveyed to conservators in a meaningful way. Holography and speckle interferometry based sensors are commonly used for this application and of these shearography is quite suitable for measurements outside the...conference paper 2009
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- Groves, R.M. (author) conference paper 2015
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Anisimov, A. (author), Groves, R.M. (author)Shearography (speckle pattern shearing interferometry) is a non-destructive testing technique that provides full-field surface strain characterization. Although real-life objects especially in aerospace, transport or cultural heritage are not flat (e.g. aircraft leading edges or sculptures), their inspection with shearography is of interest for...conference paper 2015
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- Papadakis, V. (author), Groves, R.M. (author), Tornari, V. (author), Portales, C. (author), Borreman, A. (author), Vermeiren, J. (author), Ward, J.D. (author), Ribes-Gomez, E. (author) conference paper 2015
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Goto, D.T. (author), Groves, R.M. (author)This paper describes the development of an opto-mechanical simulation of a complete shearography system, including the shearography instrument, the samples and the test environment. This simulation is applied to the measurement of 3D strains in engineering samples. The samples are a cylinder loaded by internal pressure and a flat plate under...conference paper 2010
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Liu, P. (author), Groves, R.M. (author), Benedictus, R. (author)Optical coherence elastography (OCE) has been applied to the study of microscopic deformation in biological tissue under compressive stress for more than a decade. In this paper, OCE has been extended for the first time, to the best of our knowledge, to deformation measurement in a glass fiber composite in the field of nondestructive testing. A...journal article 2014
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Mizutani, Y. (author), Groves, R.M. (author)This paper describes the measurement of average strain, strain distribution and vibration of a cantilever beam made of Carbon Fiber Reinforced Plastics (CFRP), using a single Fibre Bragg Grating (FBG) sensor mounted on the beam surface. Average strain is determined from the displacement of the peak wavelength of reflected spectrum from the FBG...journal article 2011
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Miesen, N. (author), Sinke, J. (author), Groves, R.M. (author), Benedictus, R. (author)The novelty of the research is the detection of different types of flaws in the prepreg carbon fibre-reinforced fibres (CFRP) layup compared to in cured products. This paper presents the development of a new method for in situ detection of prepreg CFRP production flaws combining laser displacement sensors and analytical modelling. Experimental...journal article 2015
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Sawaf, F. (author), Groves, R.M. (author)Phase unwrapping is one of the key steps of interferogram analysis, and its accuracy relies primarily on the correct identification of phase discontinuities. This can be especially challenging for inherently noisy phase fields, such as those produced through shearography and other speckle-based interferometry techniques. We showed in a recent...journal article 2014
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