H
H.J.R. Westra
Researcher at Delft University of Technology
Publications - 13
Citations - 669
H.J.R. Westra is an academic researcher from Delft University of Technology. The author has contributed to research in topics: Resonator & Cantilever. The author has an hindex of 10, co-authored 13 publications receiving 588 citations.
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Journal ArticleDOI
Nonlinear Modal Interactions in Clamped-Clamped Mechanical Resonators
TL;DR: The observed complex nonlinear dynamics are quantitatively captured by a model based on coupling of the modes via the beam extension; the same mechanism is responsible for the well-known Duffing nonlinearity in clamped-clamped beams.
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Size-dependent effective Young’s modulus of silicon nitride cantilevers
Khashayar Babaei Gavan,H.J.R. Westra,Emile van der Drift,Warner J. Venstra,Herre S. J. van der Zant +4 more
TL;DR: In this paper, the effective Young's modulus of silicon nitride cantilevers is determined for thicknesses in the range of 20-684 nm by measuring resonance frequencies from thermal noise spectra.
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Mechanical stiffening, bistability, and bit operations in a microcantilever
TL;DR: In this paper, the authors investigated the nonlinear dynamics of microcantilevers and showed that at strong driving, the cantilever amplitude is bistable and suggested several applications for the bistability of the canticle.
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Q-factor control of a microcantilever by mechanical sideband excitation
TL;DR: In this paper, the authors demonstrate the coupling between the fundamental and second flexural modes of a microcantilever, where the mechanical cavity is formed by the second vibrational mode of the same cantilever coupled to the fundamental mode via geometric nonlinearity.
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Q-factor control of a microcantilever by mechanical sideband excitation
TL;DR: In this article, the authors demonstrate the coupling between the fundamental and second flexural modes of a microcantilever by exciting the cantilever at the sum and difference frequencies between the two modes.