Extended Rod Theory | ScienceGate

The development of self-powered electronic devices is essential for emerging technologies such as wireless sensor networks, wearable electronics, and microrobotics. Of particular interest is the rapidly growing field of piezoelectric energy harvesting (PEH), in which mechanical strains are converted to electricity. Recently, PEH has been demonstrated by brushing an array of piezoelectric nanowires against a nanostructured surface. The piezoelectric nanobrush generator can be limited to sub-micron dimensions and thus allows for a vast reduction in the size of self-powered devices. Moreover, energy harvesting is controlled through contact between the nanowire tips and nanostructured surface, which broadens the design space to a wealth of innovations in tribology. Here we propose design criteria based on principles of contact mechanics, elastic rod theory, and continuum piezoelasticity.

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Correction to: A one-dimensional model of 3-D structure for large deformation: a general higher-order rod theory

Acta Mechanica ◽

10.1007/s00707-018-2222-3 ◽

2018 ◽

Vol 229 (10) ◽

pp. 4313-4317 ◽

Cited By ~ 1

Author(s):

A. Arbind ◽

J. N. Reddy

Keyword(s):

Large Deformation ◽

Higher Order ◽

Dimensional Model ◽

One Dimensional ◽

Rod Theory

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Coupled Time-Domain Hydro-Elastic Simulation for Submerged Floating Tunnel Under Wave Excitations

10.1115/omae2021-62969 ◽

2021 ◽

Author(s):

Chungkuk Jin ◽

Sung-Jae Kim ◽

MooHyun Kim

Keyword(s):

Time Domain ◽

Domain Model ◽

Mooring Line ◽

Wave Forces ◽

Rod Theory ◽

Discrete Module ◽

Simulation Based ◽

Submerged Floating Tunnel ◽

The Time Domain ◽

Elastic Simulation

Abstract We develop a fully-coupled time-domain hydro-elasticity model for the Submerged Floating Tunnel (SFT) based on the Discrete-Module-Beam (DMB) method. Frequency-domain simulation based on 3D potential theory results in multibody’s hydrodynamic coefficients and excitation forces for tunnel sections. Subsequently, we build the time-domain model with the multibody Cummins equation and external stiffness matrix from the Euler-Bernoulli and Saint-Venant torsion theories. We establish the mooring line model with rod theory and couple components with translational springs at their respective connection locations. We then compare the dynamic motions, wave forces, and mooring tensions between the present and Morison-equation-based elastic models under regular wave excitations at different submergence depths. The present model is especially important for the shallowly submerged tunnel in which the Morison model shows exaggerated motions, especially at high-frequency range.

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