Searched for: subject%3A%22Additive%255C%2Bmanufacturing%22
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Kotter, L.N. (author), Bouma, R.H.B. (author), Groven, L.J. (author)
Pyrotechnic flares are used extensively, with each color relating to specific information such as landing zone, enemy location, medical evacuation, or submarine location. While all current military flares are restricted to a single illumination color, progress towards a wavelength selectable signal and/or multispectral signal is of interest. In...
article 2023
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Post, Z.J. (author), Zimbeck, W.R. (author), Storck, S.M. (author), van Kempen, F. (author), Otter, G.C.J. (author), Boldt, J.D. (author), van der Laan, L. (author), Szczesniak, S.R. (author), Carter, R.H. (author), Mueller, R.K. (author), Nimer, S.M. (author), Trigg, d.B. (author), Berkson, M.A. (author), Morgan, M.F. (author), Swartz, W.H. (author)
A framework for additive manufacturing aluminum alloy selection was developed to determine the preferred composition and process parameters from which to fabricate topology-optimized optical instrument housings and light-weighted freeform mirrors for the Compact Hyperspectral Air Pollution Sensor (CHAPS). In recent years, a number of high...
conference paper 2023
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Westbeek, S. (author), Remmers, J.J.C. (author), van Dommelen, J.A.W. (author), Maalderink, H.H. (author), Geers, M.G.D. (author)
In photopolymerization-based additive manufacturing a complex interplay exists between the vat photopolymerization process characteristics and the (photo-active) resin’s material properties, which governs the trajectory from the input target geometry to the resulting true geometry of a printed component. Particularly for fine featured geometries...
article 2021
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Swartz, W.H. (author), Krotkov, N.A. (author), Lamsal, L.N. (author), Otter, G.C.J. (author), van Kempen, F.C.M. (author), Boldt, J.D. (author), Morgan, M.F. (author), der Laan, L.W.van (author), Zimbeck, W.R. (author), Storck, S.M. (author), Post, Z.J. (author), Janz, S.J. (author), Kowalewski, M.G. (author), Li, C. (author), Veefkind, J.P. (author), Levelt, P.F. (author)
Adverse air quality impacts human health and climate and has implications for environmental equity. The Compact Hyperspectral Air Pollution Sensor (CHAPS) is a newly designed small imaging spectrometer for remote sensing of nitrogen dioxide (NO2) and other air pollutants from space. It incorporates two emerging technologies, to achieve the...
conference paper 2021
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Zhang, L. (author), Noort, M. (author), van Bommel, K. (author)
Bakery products with interesting color, shape and texture have been created using 3D food printing. Current research focuses on the development of new formulations and the optimization of the printing and post-printing treatment processes, in order to obtain high-quality 3D-printed bakery products. Knowledge about food rheology is useful for the...
bookPart 2021
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Roulet, M. (author), Atkins, C. (author), Hugot, E. (author), Snell, R. (author), van de Vorst, B. (author), Morris, K. (author), Marcos, M. (author), Todd, I. (author), Miller, C. (author), Dufils, J. (author), Farkas, S. (author), Mezo, G. (author), Tenegi, F. (author), Vega-Moreno, A. (author), Schnelter, H. (author)
In this paper we are exploring the possibilities of 3D printing in the fabrication of mirrors for astronomy. Taking the advantages of 3D printing to solve the existing problems caused by traditional manufacturing, two proof-of- concept mirror fabrication strategies are investigated in this paper. The first concept is a deformable mirror with...
article 2020
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Straathof, M.H. (author), van Driel, C.A. (author), van Lingen, J.N.J. (author), Ingenhut, B.L.J. (author), ten Cate, A.T. (author), Maalderink, H.H. (author)
A photocurable energetic resin was developed for photopolymerization additive manufacturing. The composition contains 50 wt % RDX, 25 wt % acrylate binder, and 25 wt % energetic plasticizer. The material was characterized in terms of compatibility, printability, mechanical properties and (ballistic) performance. The possibility of printing...
article 2020
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Farkas, S. (author), Agocs, T. (author), Atkins, C. (author), Brouwers, L. (author), Dufils, J. (author), Joo, A. (author), MezA', G. (author), Morris, K. (author), Rodenhuis, M. (author), Roulet, M. (author), Schnetler, H. (author), Snell, R. (author), Tenegi Sanginés, F. (author), Vega-Moreno, A. (author), van de Vorst, L.T.G. (author)
A possible answer to the challenge brought by the construction of the next generation 40 m-class telescopes was the case study of FAME (Freeform Active Mirror Experiment). As the new instruments typically increased in both volume and complexity, the use of highly aspherical freeform surfaces could be a great solution as these systems are built...
conference paper 2020
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Snell, R. (author), Atkins, C. (author), Schnetler, H. (author), Todd, I. (author), Hernández-Nava, E. (author), Lyle, A.R. (author), Maddison, G. (author), Morris, K. (author), Miller, C. (author), Roulet, M. (author), Hugot, E. (author), Tenegi Sanginés, F. (author), Vega-Moreno, A. (author), Van De Vorst, L.T.G. (author), Dufils, J. (author), Brouwers, L. (author), Farkas, S. (author), MezA, G. (author), Beardsley, M. (author), Harris, M. (author)
Additive Manufacturing (AM; 3D printing) for mirror fabrication allows for intricate designs that can combine lightweight structures and integrated mounting. Conventional lightweight structures utilise cubic or prismatic unit cells, which do not provide uniform support at the edge of curved mirrors. We present a new circular lattice based upon...
conference paper 2020
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Schnetler, H. (author), van de Vorst, L.T.G. (author), Snell, R. (author), Atkins, C. (author), Miller, C. (author), Morris, K. (author), Farkas, S. (author), MezA, G. (author), Roulet, M. (author), Hugot, E. (author), Vega-Moreno, A. (author), Tenegi Sanginés, F. (author), Dufils, J. (author)
Additive manufacturing (AM) methods and post processing techniques are promising methodologies considering that it is now possible to print in a wide variety of materials using processes much refined from those originally available twenty years ago. To date the uptake of AM in Astronomy is relatively low compared to other application areas,...
conference paper 2020
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Inyang-Udoh, U. (author), Guo, Y. (author), Peters, J. (author), Oomen, T. (author), Mishra, S. (author)
article 2020
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Maalderink, H.H.H. (author), Bruning, F.B.J. (author), de Schipper, M.M.R. (author), van der Werff, J.J.J. (author), Germs, W.W.C. (author), Remmers, J.J.C. (author), Meinders, E.R. (author)
The need for personalised and smart products drives the development of structural electronics with mass-customisation capability. A number of challenges need to be overcome in order to address the potential of complete free form manufacturing of electronic devices. One key challenge is the integration of conductive structures and components into...
article 2018
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Yepes, C. (author), Gandini, E. (author), Dijk, R.V. (author), Bruning, F. (author), Maalderink, H. (author), Monni, S. (author), van Vliet, F.E. (author)
A 24 GHz antenna design for miniaturized FMCW radar is presented. The antenna was manufactured with additive manufacturing technology at TNO. The characterization of the polymer material used in the fabrication was carried out and the measurement results of the antenna are presented in this work. A good agreement between simulations and...
conference paper 2018
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Hafkamp, T. (author), van Baars, G. (author), de Jager, B. (author), Etman, P. (author)
Vat photopolymerization is a prominent additive manufacturing technology for the fabrication of near-net shape ceramic parts. To serve the high tech industry’s needs, additive manufacturing equipment has to scale up to larger product sizes and higher, repeatable product quality. This motivates the integration of more process monitoring and...
article 2018
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Yepes, J.C. (author), Gandini, E. (author), van Dijk, R. (author), Bruning, F. (author), Maalderink, H. (author), Morini, S. (author), van Vliet, F.E. (author)
A 24 GHz antenna design for miniaturized FMCW radar is presented. The antenna was manufactured with additive manufacturing technology at TNO. The characterization of the polymer material used in the fabrication was carried out and the measurement results of the antenna are presented in this work. A good agreement between simulations and...
conference paper 2018
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Sharma, M.K. (author), Frijns, A.J.H. (author), Mandamparambil, R. (author), Kooman, J.P. (author), Smeulders, D.M.J. (author)
Patients with end stage renal disease are dependent on dialysis. In most outpatient centers, the dialysate is prepared with a fixed electrolyte concentration without taking into account the inter-individual differences of essential electrolytes (sodium, potassium and calcium). This one-size fits all approach can lead to acute and chronic...
conference paper 2017
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Noort, M. (author), van Bommel, K. (author), Renzetti, S. (author)
Additive manufacturing, also known as 3D printing, is an up-and-coming production technology based on layer-by-layer deposition of material to reproduce a computer-generated 3D design. Additive manufacturing is a collective term used for a variety of technologies, such as fused deposition modeling (FDM), inkjet printing (IJP), powder bed...
article 2017
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de Kruif, B.J. (author), Schmidhauser, E. (author), Stadler, K.S. (author), O'Sullivan, L.W. (author)
The aim of our work is to improve the existing user-exoskeleton models by introducing a simulation architecture that can simulate its dynamic interaction, thereby altering the initial motion of the user. A simulation architecture is developed that uses the musculoskeletal models from OpenSim, and that implements an exoskeleton control algorithm...
article 2017
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Hofland, E.C. (author), Baran, I. (author), Wismeijer, D.A. (author)
Selective laser sintering (SLS) is an additive manufacturing technique that enables the production of customized, complex products. SLS has proven itself a viable prototyping tool and production method for noncritical products. The industry has picked up on the potential of SLS, which raised the question whether it is possible to produce...
article 2017
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de Kruif, B.J. (author)
Wafer fabrication is the major cost contributor in semiconductor manufacturing. One of the steps in the fabrication is the removal of exposed layers in an automatic wet-etch station with chemicals. In time, these chemicals get polluted and their effectiveness decreases. Therefore, the chemicals in these baths need to be renewed or maintained on...
conference paper 2015
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