Metallic micro-wires (diameter a parts per thousand 10 mu m) are widely used to suspend reference bodies and isolate them from micro-seismic vibration because of their low bending and torsional stiffness. They make it possible to realize torsion/swing low-resonant frequency oscillators, spectrally separable from the higher frequency physics of interest. In this study, metallic micro-wires are used to provide both seismic isolation through flexural compliance and high-speed actuation thanks to axial stiffness. An experimental apparatus is realized to characterize the dynamic response of a 25 mu m diameter tungsten wire used to actuate a suspended mass (10(-2) kg) subjected to accelerations up to 0.2 m/s(2). A theoretical non-linear model taking into account flexural and axial behaviour of the wire is developed and validated experimentally. Such a model makes it possible to predict the actual motion of the object, which significantly differs from that of the actuator.



Titolo: Non-linear Mechanical Behaviour of Metallic Micro-wires under Dynamic Axial Loads
Autori: Benedetti, Matteo; Bortoluzzi, Daniele; Zanoni, Carlo
Autori Unitn: 
Benedetti, Matteo
Bortoluzzi, Daniele
Zanoni, Carlo
Titolo del periodico: EXPERIMENTAL MECHANICS
Anno di pubblicazione: 2012
Numero e parte del fascicolo: 3
Codice identificativo Scopus: 2-s2.0-84857783978
Codice identificativo ISI: WOS:000301004200001
Digital Object Identifier (DOI): 10.1007/s11340-011-9485-0
Handle: http://hdl.handle.net/11572/86521
Appare nelle tipologie:03.1 Articolo su rivista (Journal article)

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