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Nazeer, N. (author), Groves, R.M. (author)Abstract: Optical fibre sensors and in particular fibre Bragg gratings (FBG) have received a lot of interest for Structural Health Monitoring in different application fields, such as aerospace, pipeline and civil engineering. FBGs are conventionally used to monitor strain and sometimes temperature. In this paper, we propose a new method for...journal article 2021
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Nazeer, N. (author), Wang, Xuerui (author), Groves, R.M. (author)This paper presents a study on trailing edge deflection estimation for the SmartX camber morphing wing demonstrator. This demonstrator integrates the technologies of smart sensing, smart actuation and smart controls using a six module distributed morphing concept. The morphing sequence is brought about by two actuators present at both ends of...journal article 2021
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Wang, X. (author), Benedictus, R. (author), Groves, R.M. (author)A conventional distributed fiber optic sensing system offers close to linear sensitivity along the fiber length. However gold nanoparticles (NP) have been shown to be able to enhance the contrast ratio to improve the quality of signal detection. The challenge in improving the contrast of reflected signals is to optimise the nanoparticle...journal article 2021
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Padoan, R. (author), Klein, Marvin E. (author), Groves, R.M. (author), de Bruin, Gerrit (author), Steemers, Ted A.G. (author), Strlič, Matija (author)Ageing of historical documents often results in changes in the optical properties of the constituent materials. Imaging spectroscopy (IS) can be a valuable tool for monitoring of such changes, if the method fulfils two important conditions. Firstly, compared to natural ageing, the accumulated light dose from repeated measurements of the...journal article 2021
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Meister, S. (author), Möller, Nantwin (author), Stüve, Jan (author), Groves, R.M. (author)In the aerospace industry, the Automated Fiber Placement process is an established method for producing composite parts. Nowadays the required visual inspection, subsequent to this process, typically takes up to 50% of the total manufacturing time and the inspection quality strongly depends on the inspector. A Deep Learning based...journal article 2021
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Wang, X. (author), Benedictus, R. (author), Groves, R.M. (author)Optical fibre backscatter reflectometry is an important technique for Structural Health Monitoring (SHM). In recent years, increasing the intensity of backscattered light in backscatter reflectometry has shown the advantage of improving the signal detection in shape sensing and temperature detection due to the increase of signal to noise...journal article 2021
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Meister, S. (author), Wermes, Mahdieu (author), Stueve, J. (author), Groves, R.M. (author)In the aerospace industry, automated fibre laying processes are often applied for economical composite part fabrication. Unfortunately, the current mandatory visual quality assurance process takes up to 50% of the entire manufacturing time. An automised classification of manufacturing deviations using Neural Networks potentially improves the...journal article 2021
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Meister, S. (author), Wermes, Mahdieu A.M. (author), Stuve, Jan (author), Groves, R.M. (author)Automated fibre layup techniques are commonly used composite manufacturing processes in the aviation sector and require a manual visual inspection. Neural Network classification of defects has the potential to automate this visual inspection, however, the machine decision-making processes are hard to verify. Thus, we present an approach for...conference paper 2021
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Anand, C. (author), Groves, R.M. (author), Benedictus, R. (author)Ultrasonic testing using arrays is becoming widely used to test composite structures in the Aerospace industry. In recent years, the Full Matrix Capture (FMC) technique has been implemented to extract the signals for post-processing to form an image. The inherent anisotropy and the layering of the structure pose challenges for the...journal article 2020
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Ochôa, Pedro (author), Groves, R.M. (author), Benedictus, R. (author)A reliable damage diagnostic by ultrasonic guided wave (GW) based structural health monitoring (SHM) can only be achieved if the physical interactions between wave propagation, the SHM system and environmental factors are fully understood. The purpose of this research was to gain knowledge about the effects of high-amplitude low-frequency...journal article 2020
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Cheng, L. (author), Xin, H. (author), Groves, R.M. (author), Veljkovic, M. (author)S460 steel is increasingly used in civil engineering, especially in a harsh environment such as offshore structures [1]. Material damage is inevitable for structures subjected to static and dynamic loads during their technical life time. Thus, monitoring material damage is important for providing information regarding critical damage of in...abstract 2020
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Anisimov, A. (author), Groves, R.M. (author), Fazzi, L. (author), Tao, N. (author), Elenbass, Marce (author), Huizinga, Jon (author), Troost, Peter (author), Wevers, Davy (author)PowerPoint presentation: Dutch initiative of innovative companies and knowledge institutes combine and develop knowledge and experience in inspection, production, repair and maintenance of composites.other 2020
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Nazeer, N. (author), Groves, R.M. (author), Benedictus, R. (author)PowerPoint presentationother 2020
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Groves, R.M. (author), Valvano, S. (author), Fazzi, L. (author), Alaimo, A. (author)PowerPoint presentationother 2020
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Mkhoyan, T. (author), Stuber, V.L. (author), Nazeer, N. (author), De Breuker, R. (author), Groves, R.M. (author), Groen, W.A. (author), van der Zwaag, S. (author), Sodja, J. (author), Wang, X. (author)PowerPoint presentationother 2020
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Maria, M. (author), Anisimov, A. (author), Stols-Witlox, Maartje (author), Groves, R.M. (author)In this study we investigate the possibility of spectra stitching in the context of Spectral Domain - Optical Coherence Tomography (SD-OCT). The aim is to reach a high axial resolution while keeping sampling issues to a low level (slow decay in depth) but still operating with the fastest camera line rate available. The paper focuses mainly on...conference paper 2020
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Fazzi, L. (author), Groves, R.M. (author)Reflective Tilted Fiber Bragg Grating (TFBG) sensors have intriguing sensing capabilities due to the resonance-peaks present in their transmitted spectrum. Previous works measured the external refractive index (ERI) in which the TFBG sensor is placed, by considering the wavelengths or the envelope of the cladding-modes resonances. In this...journal article 2020
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Anand, C. (author), Delrue, Steven (author), Jeong, Hyunjo (author), Shroff, Sonell (author), Groves, R.M. (author), Benedictus, R. (author)Phased array ultrasonic testing is widely used to test structures for flaws due to its ability to produce steered and focused beams. The inherent anisotropic nature of some materials, however, leads to skewing and distortion of the phased array beam and consequently measurement errors. To overcome this, a quantitative model of phased array...journal article 2020
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Meister, S. (author), Wermes, Mahdieu Amin Mahdieu (author), Stüve, Jan (author), Groves, R.M. (author)The Automated Fiber Placement process is established in the aerospace industry for the production of composite components. This technique places several narrow material strips in parallel. Within current industrial Automated Fiber Placement processes the visual inspection takes typically up to 50% of overall production time. Furthermore,...conference paper 2020
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Nokhbatolfoghahai, A. (author), Navazi, H. M. (author), Groves, R.M. (author)In this paper, the hybrid Delay-And-Sum (DAS) with Sparse Reconstruction (SR) method was further developed for damage location in composite plates. In composite materials, anisotropy leads to some challenges in using conventional damage location methods, which are developed for isotropic materials. In the hybrid DAS-SR method, the DAS and SR...journal article 2020