Measurements of Young’s moduli of microstructures are frequently based on dynamics tests on microbeams. The aim of this work is evaluating if the accuracy of these measurements is affected significantly by the anticlastic effect. A non linear model of cantilever’s dynamics behavior is thus developed and applied to some characteristic cases. The obtained results show that, even if the introduced non linearity is small enough to allow a modal approach to be still applied, the anticlastic effect has a meaningful influence on measurement accuracies, as evidenced by the dependence of the resonant frequency on vibration amplitudes. The proposed treatise permits determining the appropriate range of excitation amplitudes to be used during the experiments and consequently to reduce appreciably the intervals of uncertainty of the measurements.
Mechanical properties of microcantilevers: influence of the anticlastic effect
DE BONA, Francesco;MUNTEANU, Mircea Gheorghe
2011-01-01
Abstract
Measurements of Young’s moduli of microstructures are frequently based on dynamics tests on microbeams. The aim of this work is evaluating if the accuracy of these measurements is affected significantly by the anticlastic effect. A non linear model of cantilever’s dynamics behavior is thus developed and applied to some characteristic cases. The obtained results show that, even if the introduced non linearity is small enough to allow a modal approach to be still applied, the anticlastic effect has a meaningful influence on measurement accuracies, as evidenced by the dependence of the resonant frequency on vibration amplitudes. The proposed treatise permits determining the appropriate range of excitation amplitudes to be used during the experiments and consequently to reduce appreciably the intervals of uncertainty of the measurements.File | Dimensione | Formato | |
---|---|---|---|
SNA7155 final.pdf
non disponibili
Tipologia:
Altro materiale allegato
Licenza:
Non pubblico
Dimensione
607.59 kB
Formato
Adobe PDF
|
607.59 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.