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Jovanova, J. (author), Var, S.C.S. (author)Underwater robot tasks pose many challenges for conventional robotic systems. The current rigid robots are limited in their adaptability to the environment and the objects to be manipulated. Soft grasping of objects offers advantages due to the flexibility when dealing with, for example, living organisms, random shaped objects, and coral...conference paper 2023
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Ozdemir, Mehmet (author), Doubrovski, E.L. (author)We propose a new approach to obtain local property variations in 3D-printed objects using a single-nozzle 3D printer and one filament. We use foaming filaments which expand at different rates due to different temperatures. We present an approach to harness this varying expansion by including parameters of the 3D printing process in the design...conference paper 2023
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van Oudheusden, A.A. (author), Buijserd, A.J. (author), Doubrovski, E.L. (author), Flipsen, Bas (author), Faludi, Jeremy (author), Balkenende, R. (author)Spare parts availability is crucial for extending the life of consumer products. However, long-term availability could lead to high stocks of spare parts, which might not be used. Instead, on-demand manufacturing of spare parts with additive manufacturing (AM) is a promising alternative. This paper presents a method to evaluate parts on their...conference paper 2023
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Hehenberger, S.P. (author), Caizzone, Stefano (author), Thurner, Stefan (author), Yarovoy, Alexander (author)Additive manufactured structured dielectrics with engineered permittivity tensors are promising tools for novel microwave components and are drawing increasing attention from researchers. However, design modeling and experimental verification of anisotropic materials are challenging and have not yet been thoroughly explored in the literature. In...conference paper 2023
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Lesueur, M. (author), Zhang, X. (author), Poulet, Thomas (author), Veveakis, Manolis (author)The seminal work of Gurson (J Eng Mater Technol 99:2–5, 1977) on a simplified pore structure, a single spherical pore, first provided a theoretical relationship between the yield stress and the porosity. This contribution extends the approach to determine the macroscopic yield of a porous material by taking explicitly into account its...conference paper 2023
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Samenjo, K.T. (author), van Oudheusden, A.A. (author), Bolanos Arriola, J. (author), Flipsen, Bas (author), Faludi, Jeremy (author)The Sharepair project aims to decrease the waste of electronic and electric consumer products and increase their useful life, by supporting repair communities and scaling up citizen repairs through digital tools. One of the focus areas of this project is to support the discovery or manufacturing of spare parts. With a 3D CAD model of a part and...conference paper 2022
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Mustapha, K. A. (author), Shikh Anuar, F. (author), Mohd Sa’at, F. A.Z. (author), Zini, N. H.M. (author), Mat Tokit, E. (author), Satishwara Rao, N. (author), Hooman, K. (author), Abdi, Iman Ashtiani (author)In this study, 3D printed open-cell foam were produced and reconstructed from open-cell metal foam structure using a tomography scanning method and two different additive manufacturing technologies. The materials used in the 3D printing were nylon powder and plastic acid. The porous morphology and surface finish of the 3D printed foams were...conference paper 2022
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Zhang, C. (author), Deng, Z.C. (author), Zhang, Y.M. (author), Chen, C. (author)This paper develops an empirical model to predict the static yield stress of 3D printing mortar based on the flowability of paste and excess paste thickness. The components of the mortar are divided into paste and aggregate. The relation between the yield stress of mortar and the yield stress of paste and the excess paste thickness is...conference paper 2021
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Oikonomopoulou, F. (author), Bhatia, I.S. (author), van der Weijst, F.A. (author), Damen, J.T.W. (author), Bristogianni, T. (author)This paper explores two alternative mould fabrication technologies that allow for the casting of (solid) glass components with a great degree of freedom in shape and size and/or of a customized design, in a cost-efficient way. In specific, the paper discusses the research, design and experimental work conducted at TU Delft on 3D-printed sand...conference paper 2020
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Saleh, Charbel Miled Nohra (author), Louter, P.C. (author), Turrin, M. (author)This paper investigates the stiffness and the durability of a composite panel that consists of thin glass as outer layers and a 3D printed core element from recycled PET. Thin alumino-silicate glass, mostly used for displays in computers, tablets and smartphones, is known for its flexibility, durability and high bending strength. However, for...conference paper 2020
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Garimella, Raman (author), Moens, Siemen (author), Vleugels, Jochen (author), Huysmans, T. (author), Beyers, koen (author), Verwulgen, Stijn (author)Gaining aerodynamic advantage is crucial in cycling, wherein drag force can account for 90% of resistance to a cyclist. The interaction of wind with the moving human and cycling equipment also contributes to drag. Testing equipment for aerodynamic properties in a wind tunnel is of interest to manufacturers in the sports industry. However, a...conference paper 2020
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Xu, Y. (author), Šavija, B. (author), Schlangen, E. (author)Traditionally, mechanical properties of cementitious materials are designed<br/>“chemically”, namely by configuring their mix proportions. Owning to the development of 3D printing technology, “physical” tailoring the meso-structure of cementitious materials to design their mechanical properties becomes possible. In the present study,...conference paper 2019
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Gunda, Arun (author), Özkayar, G. (author), Tichem, M. (author), Ghatkesar, M.K. (author)Microvalves are important flow-control components in many standalone and integrated microfluidic circuits. Although there is a large body of work regarding<br/>microvalves, there is still a need for an easyto-fabricate, small-footprint, low-power device that can control both liquids and gases at moderate pressures. This paper details the...conference paper 2019
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Schenatoa, Luca (author), Aguilar Lopez, J.P. (author), Galtarossa, Andrea (author), Pasutoa, Alessandro (author), Bogaard, T.A. (author), Palmieri, Luca (author)We present the design and field test of a rugged FBG sensor prototype for high-sensitivity measurement of underground water level. Pressure sensors have many fields of application, ranging from environmental monitoring to the oil and gas industry. In particular, pressure sensors can be used to monitor the stability of dikes and embankments by...conference paper 2019
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Mostafavi, Sina (author), Bier, H.H. (author), Kemper, B.N. (author), Fischer, D.L. (author)Considering both architectural and constructional aspects of the built environment, hybridity or multi-materiality is essential to generate functional habitable spaces. Buildings consist of subsystems that each require different and sometimes conflicting material attributes and behaviours. In this context, expanding the solution space for...conference paper 2018
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Vermeulen, A.C.J. (author), Sirenko, Mikhail (author), Kiem, Jason (author), Theys, Andreas (author), Brazier, F.M. (author), Papic González, Alvaro (author)The hostile and unpredictable environment of deep space requires a new conceptual approach for interstellar flight, one that differs radically from any current design in aerospace. A design solution is proposed in which the starship is attached to a C-type asteroid and whose architecture evolves over time. The starship gradually mines...conference paper 2018
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Sauerwein, M. (author), Bakker, C.A. (author), Balkenende, R. (author)Circular product design is a relatively new approach to design suitable strategies to realize circular products. Additive manufacturing (AM) is seen as a promising enabling production process. It has digital and additive characteristics, which makes AM different from conventional production techniques. However, it is yet unclear how this...conference paper 2017
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Kuipers, Tim (author), Doubrovski, E.L. (author), Verlinden, J.C. (author)This work presents halftoning techniques to manufacture 3D objects with the appearance of full grayscale imagery for Fused Deposition Modeling (FDM) printers. While droplet-based dithering is a common halftoning technique, this is not applicable to FDM printing, since FDM builds up objects by extruding material in semi-continuous paths. A set...conference paper 2017
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Yang, Y. (author), Ayas, C. (author)The Selective laser melting (SLM) is a powder based additive manufacturing (AM) method to produce high density metal parts with complex topology. However, part distortions and accompanying residual stresses deteriorates the mechanical reliability of SLM products. Modelling of the SLM process is anticipated to be instrumental for understanding...conference paper 2017
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Yang, Y. (author), Ayas, C. (author)Selective laser melting (SLM) is a powder based additive manufacturing technique suitable for producing high precision metal parts. However, distortions and residual stresses within products arise during SLM because of the high temperature gradients created by the laser heating. Residual stresses limit the load resistance of the product and...conference paper 2017
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