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Singh, Avishreshth (author), Biligiri, Krishna Prapoorna (author), Sampath, Prasanna Venkatesh (author)The use of nondestructive ultrasonic pulse velocity (UPV) testing to assess the hardened properties of pervious concrete (PC) mixtures is an emerging research area. Further, UPV has been successfully used to determine the effective flow resistivity (EFR) of asphalt concrete and cement concrete pavements. However, no research studies have...journal article 2023
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Abedin, K.M. (author), Tao, N. (author), Anisimov, A. (author), Groves, R.M. (author)The performance of defect detection in composite materials using digital shearography is important for correct decision-making in non-destructive testing. In this work, we compared a high-resolution 24-megapixel digital still camera (DSLR) and a conventional medium-resolution 5-megapixel camera to determine the detectability of blind holes in...conference paper 2023
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Kovacevic, Meho Sasa (author), Bačić, Mario (author), Librić, Lovorka (author), Gavin, Kenneth (author)To identify the unknown values of the parameters of Burger’s constitutive law, commonly used for the evaluation of the creep behavior of the soft soils, this paper demonstrates a procedure relying on the data obtained from multiple sensors, where each sensor is used to its best advantage. The geophysical, geotechnical, and unmanned aerial...journal article 2022
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El-Dessouky, Hassan M. (author), Saleh, M. (author), Wang, Ying (author), Alotaibi, Mohamed S. (author)The effect of the weaving architecture and the z-binding yarns, for 2D and 3D woven composites on the low-velocity impact resistance of carbon fibre reinforced composites, is investigated and benchmarked against noncrimp fabric (NCF). Four architectures, namely: NCF, 2D plain weave (2D-PW), 3D orthogonal: plain (ORT-PW) and twill (ORT-TW), were...journal article 2021
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Tan, Xuyan (author), Chen, Weizhong (author), Wang, L. (author), Yang, Jianping (author)Shield tunneling is one of the most important technologies for building of underground engineering. Many grouting holes were prefabricated for the requirement of backfill grouting, which is easy to induce local damages and potential disasters, such as leakage and cracking. Accordingly, an integrated workflow for damage detection and stability...journal article 2020
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Fan, Guangpeng (author), Nan, L. (author), Chen, Feixiang (author), Dong, Yanqi (author), Wang, Zhiming (author), Li, Hao (author), Chen, Danyu (author)Tree-level information can be estimated based on light detection and ranging (LiDAR) point clouds. We propose to develop a quantitative structural model based on terrestrial laser scanning (TLS) point clouds to automatically and accurately estimate tree attributes and to detect real trees for the first time. This model is suitable for forest...journal article 2020
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Tan, Xuyan (author), Chen, Weizhong (author), Wang, L. (author), Yang, Jianping (author)The investigation of concrete structural performance is crucial to maintain the stability of infrastructure. In order to assess structural stability, this work focuses on the development of an integrated framework to detect damaged conditions in the field and analyze their effect on mechanical performance through nondestructive testing (NDT)...journal article 2020
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Groves, R.M. (author)The new generation of civil aircraft, including the Airbus A380 and the Boeing 787, are composed of composite materials for their primary aircraft structures. This presents a challenge for airline maintenance, repair, and overhaul (MRO) operations in both the short- and long-term. In the short-term, new technologies are needed for maintenance,...book chapter 2018
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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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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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- van der Horst, M.P. (author) conference paper 2014
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Fan, S. (author), Li, M. (author)Concrete cracking is inevitable, and can be the result of one or a combination of factors such as dry shrinkage, thermal contraction, fatigue, and embedded steel corrosion. The presence of cracks leads to further deterioration, service life reduction of concrete infrastructure, and frequent maintenance and repairs. These challenges can be...conference paper 2013
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Kostenko, A. (author), Sharma, H. (author), Gözde Dere, E. (author), King, A. (author), Ludwig, W. (author), Van Oel, W. (author), Offerman, S.E. (author), Stallinga, S. (author), Van Vliet, L.J. (author)This work presents the development of a non-destructive imaging technique for the investigation of the microstructure of cementite grains embedded in a ferrite matrix of medium-carbon steel. The measurements were carried out at the material science beamline of the European Synchrotron Radiation Facility (ESRF) ID11. It was shown that in-line X...conference paper 2011
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Clarijs, M.C. (author), Bom, V.R. (author), Van Eijk, C.W.E. (author)Neutron resonance capture analysis (NRCA) is a method used to determine the bulk composition of various kinds of objects and materials. It is based on analyzing direct capture resonance peaks. However, the analysis is complicated by scattering followed by capture effects in the object itself. These effects depend on the object’s shape and size....journal article 2009
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- Lorenz, M. (author) doctoral thesis 1993
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Heida, J.H. (author)This report describes the concept of reliability of nondestructive inspection (NDI) and reviews the different aspects involved. First, the probability of detection (POD) of flaws in flawed specimens is discussed. To provide a measure of confidence in an estimated POD, lower botind values of this probability at a given confidence level are...report 1984
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Kolkman, H.J. (author)The effect of penetrant on the fatigue life of single shear riveted lap joints was investigated by flight simulation fatigue tests using the MINITWIST gust spectrum. The penetrant/material combination investigated was ARDROX 985 P3T and aluminium alloy 202U-T3 sheet material (both bare and clad) respectively. The effect of penetrant on the...report 1982
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de Graaf, E.A.B. (author), de Rijk, P. (author)The present report describes how fatigue cracks were produced in 102 specimens. After cracking these specimens were inspected non-destructively by means of eddy currents, ultrasonics. X-rays and penetrants, and the indications were recorded. Successively the specimens were exposed to corrosion whereafter the inspections were repeated. Upon...report 1978
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de Graaf, E.A.B. (author)The present report gives a brief description of the principles and probable advantages of the magnetic rubber inspection technique. The results of a first demonstration of the method at the NLR are discussed. It is concluded that the method needs further evaluation.report 1976
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de Graaf, E.A.B. (author)The present report reviews some of the literature on neutron radiography, its principles and its applications especially as conducted by the Energieonderzoek Centrum Nederland ECN on behalf of the National Aerospace Laboratory NLR. It is concluded that neutron radiography already is a valuable inspection tool and in addition to that it offers...report 1976