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Wang, X. (author), Xiao, Y. (author), Rans, C.D. (author), Benedictus, R. (author), Groves, R.M. (author)Nanoparticle- (NP-) doped optical fibres show the potential to increase the signal-to-noise ratio and thus the sensitivity of optical fibre strain detection for structural health monitoring. In this paper, our previous experimental/simulation study is extended to a design study for strain monitoring. 100 nm spherical gold NPs were randomly...journal article 2024
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Xiao, Y. (author), Rans, C.D. (author), Zarouchas, D. (author), Benedictus, R. (author)Embedding fiber optic sensors (FOSs) within parts for strain measurement is attracting widespread interest due to its great potential in the field of structural health monitoring (SHM). This work proposes a novel method of embedding FOSs using capillaries within solid structures and investigates fiber positions and orientation uncertainties...journal article 2023
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Rans, C.D. (author)This paper presents the results of a collaborative project initiated by first year teaching staff and study counsellors within the Aerospace Engineering Bachelor’s programme at Delft University of Technology aimed at tackling the challenge of stimulating critical self-reflection and coping with failure. This project took the concept of a study...conference paper 2023
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Smeets, E.T.B. (author), Rans, C.D. (author), Castro, Saullo G.P. (author), Villegas, I.F. (author)In thermoplastic composite joints with a circular ultrasonic spot weld, the damage growth is located at the interface between the joined components. This means that any damage in these joints is invisible from the outside. This experimental study compares three different in-situ methods to measure the damage growth indirectly. The motivation...journal article 2023
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Schuurman, M.J. (author), Rans, C.D. (author)The Faculty of Aerospace Engineering at the Delft University of Technology has an active learning philosophy which is embedded in its curriculum. The first year project Design and Construction is run in the second semester. The course aims to provide “hands-on” experience to students in design and construction. Applying knowledge from courses...conference paper 2022
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Smeets, E.T.B. (author), Rans, C.D. (author), Alderliesten, R.C. (author), Castro, Saullo G.P. (author), Villegas, I.F. (author)Ultrasonic spot welding is a joining technique for thermoplastic composites with great potential regarding processing speed and cost. To investigate the damage tolerance and possible inherent damage arresting behavior of multi-spot welded joints, a technique is necessary to measure damage growth in the joints under cyclic loading. Visual...conference paper 2022
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Kolken, H.M.A. (author), Garcia, A. Fontecha (author), Plessis, A. Du (author), Meynen, A. (author), Rans, C.D. (author), Scheys, L. (author), Mirzaali, Mohammad J. (author), Zadpoor, A.A. (author)The fatigue performance of additively manufactured auxetic meta-biomaterials made from commercially pure titanium has been studied only recently. While certain assumptions have been made regarding the mechanisms underlying their fatigue failure, the exact mechanisms are not researched yet. Here, we studied the mechanisms of crack formation...journal article 2022
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Villegas, I.F. (author), Rans, C.D. (author)Single-lap shear (SLS) joints are straightforward to manufacture. This makes them especially attractive for testing polymer composite welded joints. Owing to local heating, which is characteristic of composite welding processes, the production of more geometrically intricate joints (such as double-lap or scarfed joints) or bigger joints (such...review 2021
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- Rans, C.D. (author), Teuwen, Julie J.E. (author) conference paper 2021
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Jones, Rhys (author), Rans, C.D. (author), Iliopoulos, Athanasios P. (author), Michopoulos, John G. (author), Phan, Nam (author), Peng, Daren (author)The United States Air Force (USAF) Guidelines for the Durability and Damage Tolerance (DADT) certification of Additive Manufactured (AM) parts states that the most difficult challenge for the certification of an AM part is to establish an accurate prediction of its DADT. How to address this challenge is the focus of the present paper. To this...journal article 2021
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Ardila Rodriguez, L.A. (author), Rans, C.D. (author), Poulis, J.A. (author)Surface morphology of adherends is an important factor to take into consideration when studying and improving the performance of an adhesive bonded joint. In this study, the adhesion performance three different surface morphologies of Selective Laser Melted (SLM) Ti6Al4V was studied. The three surface morphologies were created by manufacturing...journal article 2021
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Ardila Rodriguez, L.A. (author), Boshuizen, B. (author), Rans, C.D. (author), Poulis, J.A. (author)In this study, different surface pretreatments were applied to clean and activate titanium alloy surfaces. The samples were subjected to grit blasting treatments using two different pressures and afterwards, a UV/Ozone treatment was applied at different times to study the wettability and surface oxidation of the titanium samples. Scanning...journal article 2021
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Kolken, H.M.A. (author), Garcia, A. Fontecha (author), Du Plessis, A. (author), Rans, C.D. (author), Mirzaali, Mohammad J. (author), Zadpoor, A.A. (author)Meta-biomaterials offer a promising route towards the development of life-lasting implants. The concept aims to achieve solutions that are ordinarily impossible, by offering a unique combination of mechanical, mass transport, and biological properties through the optimization of their small-scale geometrical and topological designs. In this...journal article 2021
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Shakeri, Iman (author), Shahani, Amir Reza (author), Rans, C.D. (author)Since welded joints in structures are known to be critical regions for crack initiation and growth, study of fatigue crack growth behavior of welded joints under various loading scenarios are essential. In present study, two groups of experiments were conducted. At first, fatigue crack growth behavior of Al5083 butt welded joint subjected to...journal article 2021
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Baldassarre, Alessandro (author), Martinez, Marcias (author), Rans, C.D. (author)The present study reports on the evaluation of residual stress field formation and distribution in Central Cut Plies (CCP) specimens. Real-time measurements were performed using a distributed sensing fiber optic system based on Rayleigh Backscattering, which was successfully able to capture strain distribution inside the adhesive layer at...review 2020
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Shahani, Amir Reza (author), Shakeri, Iman (author), Rans, C.D. (author)Redistribution of residual stress during crack growth in butt welded joint of Al5083-H111 was studied. Furthermore, the effect of post weld heat treatment and removing the weld reinforcements on fatigue crack growth rate was investigated. Three dimensional simulations of welding process and fatigue crack growth were conducted. It was shown...journal article 2020
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Iliopoulos, Athanasios P. (author), Jones, Rhys (author), Michopoulos, John G. (author), Phan, Nam (author), Rans, C.D. (author)Understanding and characterizing crack growth is central to meeting the damage tolerance and durability requirements delineated in USAF Structures Bulletin EZ-SB-19-01 for the utilization of additive manufacturing (AM) in the sustainment of aging aircraft. In this context, the present paper discusses the effect of differentAMprocesses,...journal article 2020
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Baldassarre, Alessandro (author), Ocampo, Juan (author), Martinez, Marcias (author), Rans, C.D. (author)The application of strain gauges as recommended by the ASTM standards provides accurate strain measurements in isotropic materials. However, their use in composite materials becomes more challenging due to their anisotropic nature. In this study, we hypothesized that the use of the distributed sensing system and the three-dimensional digital...journal article 2020
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Saunders-Smits, Gillian (author), Rans, C.D. (author), Teuwen, Julie J.E. (author), Sinke, J. (author), Alderliesten, R.C. (author), van Valkenburg, W.F. (author)Although aerospace traditionally has always had a multidisciplinary approach to engineering and design, the increasing complexity of aircraft and spacecraft and the rapid digitization within the aerospace industry has led to a large number of related engineering and scientific disciplines such as electrical engineers, computer scientist to work...conference paper 2020
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Zhao, T. (author), Tsakoniatis, Ioannis (author), Rans, C.D. (author), Villegas, I.F. (author), Benedictus, R. (author)Thermoplastic composite spot welded joints are more well-suited for carrying shear load rather than peel load. However, peel load is difficult to be eliminated in single-lap joint configuration. In this paper, a series of mechanical tests were carried out to study the effects of the spot spacing and the number of welded spots on the secondary...conference paper 2020