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Sajadi, B. (author), Alijani, F. (author), Goosen, J.F.L. (author), van Keulen, A. (author)Characterization of nonlinear behavior of micro-mechanical components in MEMS applications plays an important role in their design process. In this paper, nonlinear dynamics, stability and pull-in mechanisms of an electrically actuated circular micro-plate subjected to a differential pressure are studied. For this purpose, a reduced-order...journal article 2017
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Keyvani Janbahan, A. (author), Alijani, F. (author), Sadeghian, Hamed (author), Maturova, Klara (author), Goosen, J.F.L. (author), van Keulen, A. (author)This paper investigates the closed-loop dynamics of the Tapping Mode Atomic Force Microscopy using a new mathematical model based on the averaging method in Cartesian coordinates. Experimental and numerical observations show that the emergence of chaos in conventional tapping mode AFM strictly limits the imaging speed. We show that, if the...journal article 2017
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Sajadi, B. (author), Alijani, F. (author), Davidovikj, D. (author), Goosen, J.F.L. (author), Steeneken, P.G. (author), van Keulen, A. (author)In the last decade, graphene membranes have drawn tremendous attention due to their potential application in Nano-Electro-Mechanical Systems. In this paper, we show that the frequency response curves of graphene resonators are powerful tools for their dynamic characterization and for extracting their equivalent Young's modulus. For this purpose,...journal article 2017
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- Munro, D.P. (author), Ayas, C. (author), Langelaar, Matthijs (author), van Keulen, A. (author) abstract 2017
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- van de Ven, E.A. (author), Verboom, J.M. (author), Ayas, C. (author), Langelaar, Matthijs (author), Maas, Robert (author), van Keulen, A. (author) abstract 2017
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- Yang, Y. (author), Ayas, C. (author), van Keulen, A. (author) abstract 2017
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- Yang, Y. (author), Ayas, C. (author), van Keulen, A. (author) abstract 2017
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Gupta, D.K. (author), van der Veen, G.J. (author), Aragon, A.M. (author), Langelaar, Matthijs (author), van Keulen, A. (author)Topology optimization formulations using multiple design variables per finite element have been proposed to improve the design resolution. This paper discusses the relation between the number of design variables per element and the order of the elements used for analysis. We derive that beyond a maximum number of design variables, certain sets...journal article 2017
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Picelli, R. (author), van Dijk, R. (author), Vicente, W.M. (author), Pavanello, R. (author), Langelaar, Matthijs (author), van Keulen, A. (author)This paper presents an evolutionary structural topology optimization method for the design of completely submerged buoyant modules with design-dependent fluid pressure loading. This type of structure is used to support offshore rig installation and pipeline transportation at all water depths. The proposed optimization method seeks to identify...journal article 2017
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- Bijster, R.J.F. (author), Sadeghian Marnani, H. (author), van Keulen, A. (author) abstract 2016
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- Bijster, R.J.F. (author), Sadeghian Marnani, H. (author), van Keulen, A. (author) abstract 2016
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- Bijster, R.J.F. (author), Sadeghian Marnani, H. (author), van Keulen, A. (author) poster 2016
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- Tamer, M.S. (author), Sadeghian Marnani, H. (author), Keyvani Janbahan, A. (author), Goosen, J.F.L. (author), van Keulen, A. (author) abstract 2016
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- Keyvani, A. (author), Sadeghian, H. (author), Goosen, J.F.L. (author), van Keulen, A. (author) abstract 2016
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- Sajadi, B. (author), Goosen, J.F.L. (author), van Keulen, A. (author) abstract 2016
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Gupta, D.K. (author), Langelaar, Matthijs (author), Barink, M (author), van Keulen, A. (author)Free-form solar cells are cells of unconventional shapes (e.g. hexagonal, leaf-shaped etc). Their flexible shape adds to the aesthetics of the surroundings as well as allows to place them over objects where conventional solar cells might not fit. Evidently, these cells need to be efficient as well, and one of the important factors that...journal article 2016
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Bijster, R.J.F. (author), Sadeghian Marnani, H. (author), van Keulen, A. (author)Optical near-field technologies such as solid immersion lenses and hyperlenses are candidate solutions for high resolution and high throughput wafer inspection and metrology for the next technology nodes. Besides sub-diffraction limited optical performance, these concepts share the necessity of extreme proximity to the sample at distances that...conference paper 2016
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Peters, H.J. (author), Goosen, J.F.L. (author), van Keulen, A. (author)Lightweight vibrating structures (such as flapping wing micro air vehicle (FWMAV) designs) often require some form of control. To achieve controllability, local structural property changes (e.g., damping and stiffness changes) might be induced in an active manner. The stroke-averaged lift force production of a FWMAV wing can be modified by...journal article 2016
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Wang, Q. (author), Goosen, J.F.L. (author), van Keulen, A. (author)Quasi-steady aerodynamic models play an important role in evaluating aerodynamic performance and conducting design and optimization of flapping wings. The kinematics of flapping wings is generally a resultant motion of wing translation (yaw) and rotation (pitch and roll). Most quasi-steady models are aimed at predicting the lift and thrust...journal article 2016
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- van de Ven, Emiel (author), Driessen, Anton (author), van Keulen, A. (author), Langelaar, Matthijs (author) abstract 2015