Nonlinear damping for vibration isolation of microsystems using shear thickening fluid

This work reports the measurement and analysis of nonlinear damping of micro-scale actuators immersed in shear thickening fluids (STFs). A power-law damping term is added to the linear second-order model to account for the shear-dependent viscosity of the fluid. This nonlinear model is substantiated...

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Bibliographic Details
Published in:Applied physics letters 2013-06, Vol.102 (25)
Main Authors: Iyer, S. S., Vedad-Ghavami, R., Lee, H., Liger, M., Kavehpour, H. P., Candler, R. N.
Format: Article
Language:English
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Summary:This work reports the measurement and analysis of nonlinear damping of micro-scale actuators immersed in shear thickening fluids (STFs). A power-law damping term is added to the linear second-order model to account for the shear-dependent viscosity of the fluid. This nonlinear model is substantiated by measurements of oscillatory motion of a torsional microactuator. At high actuation forces, the vibration velocity amplitude saturates. The model accurately predicts the nonlinear damping characteristics of the STF using a power-law index extracted from independent rheology experiments. This result reveals the potential to use STFs as adaptive, passive dampers for vibration isolation of microelectromechanical systems.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4812192