Journal ArticleDOI
Thermoelastic and electromagnetic damping analysis
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TLDR
In this article, the effects of structural and geometrical constraints on damping loss factors are investigated, and optimum conditions for the maximum damping are investigated for the stage of system design.Abstract:
The thermoelastic damping due to thermal currents and the electromagnetic damping due to electric conduction currents of vibrating solids are discussed. The effects of structural and geometrical constraints on damping loss factors are investigated. Also, optimum conditions for the maximum damping, which may be useful on the stage of system design, are investigated. It is found that damping loss factors are generally dependent upon structural and geometrical configurations. An analogy exists between thermoelastic damping and electromagnetic damping, showing Debye curves with Debye peaks. Standing transverse waves are likely to achieve larger damping than standing dilatational waves in the presence of a magnetic field. Electromagnetic damping in ferromagnetic material bodies is found to be considerable in high field. The influence of thermoelastic damping on aeroelastic stability of beam plates is investigated. This research strongly suggests that thermoelastic damping improves the aeroelastic stability of beam plates.read more
Citations
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Damping factor as an indicator of crack severity
TL;DR: In this article, a homogeneous, isotropic, elastic bar of orthogonal shape with a single edge crack under alternating uniform axial stress was considered, and an analytical determination of the dynamic characteristics of the cracked structure yielded the damping factor of the bar, the material damping factors and a good correlation of depth of crack with the dampness factor.
Journal ArticleDOI
Elastothermodynamic damping in laminated composites
Joseph E. Bishop,Vikram K. Kinra +1 more
TL;DR: In this paper, the authors present a methodology for predicting the elastothermodynamic damping of an N-layer laminated composite, where the heat conduction occurs only in the direction orthogonal to the laminae.
Journal ArticleDOI
Analysis of elastothermodynamic damping in particle-reinforced metal-matrix composites
Joseph E. Bishop,Vikram K. Kinra +1 more
TL;DR: In this paper, a general methodology for calculating the elasto-thermodynamic damping was presented, taking the second law of thermodynamics as a starting point, using this method, for two canonical problems concerning particle-reinforced metal-matrix composites: (1) a single spherical inclusion in an unbounded matrix and (2) an N layer finite concentric composite sphere.
Journal ArticleDOI
Control of flexible structures by applied thermal gradients
TL;DR: In this article, thermal, elastic, and feedback analyses are applied to the case of a beam with a distributed thermal actuator, which is capable of producing a thermal gradient across the section of the beam.
Journal ArticleDOI
On Passive Damping Mechanisms in Large Space Structures
TL;DR: In this article, thermal dissipation induced by strain gradients during vibration of monolithic configurations is discussed. And the significance of even tiny amounts of passive energy dissipation to ensure successful stabilization of large, flexible space structures is explained.
References
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Journal ArticleDOI
Thermoelasticity and Irreversible Thermodynamics
TL;DR: In this article, a unified treatment of thermoelasticity by application and further developments of the methods of irreversible thermodynamics is presented, along with a new definition of the dissipation function in terms of the time derivative of an entropy displacement.
Book
Vibrations of shells and plates
TL;DR: In this article, the authors discuss the development of Vibration Analysis of Continuous Structural Elements (SSA) and their application in the field of deep shell physics, including the following: