MICRO-BEAM DYNAMICS ON VISCOELASTIC ELASTOMERIC FOUNDATIONS: MATERIAL-DEPENDENT NONLINEAR RESPONSE

A. D. Kashcheeva, A. A. Zamyshlyaeva, S. Azizi, G. Rezazadeh

Abstract


This study presents an analysis of a micro-beam resting on a three-dimensional viscoelastic elastomeric foundation when exposed to an external harmonic force. Material selection of elastomeric foundation is not merely a structural choice but a dynamic design parameter. Crucially, nonlinear phenomena are material-dependent. Under identical loading conditions, a thermoplastic elastomer (TPE) maintains a stable, linear-like response, whereas vulcanized natural rubber and ADEM-M mastic induce pronounced nonlinearities and bifurcations. This offers engineers a pathway to either suppress unwanted instabilities or harness nonlinear effects for enhanced sensor sensitivity and low-frequency energy harvesting in compact MEMS devices, fundamentally altering how viscoelastic foundations are utilized in precision engineering.

Keywords


dynamic analysis; MEMS; bifurcation analysis; material-dependent stability.

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References


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