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The response of a rectangular micro-plate to mechanical shocks considering modified couple stress theory

Credit to Download: 1 | Page Numbers 8 | Abstract Views: 1047
Year: 2012
COI code: ISAV02_083
Paper Language: English

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Authors The response of a rectangular micro-plate to mechanical shocks considering modified couple stress theory

  Kaveh Rashvand - Mechanical Engineering Department, Urmia University, 57169-33111, Urmia, Iran.
Ghader Rezazadeh -
Mehrdad Sheikhlou -
Siavash Kazemirad - Department of Mechanical Engineering, McGill University, H3A 0C3, Montreal, Canada

Abstract:

In this paper, the modified couple stress theory is used to investigate the effects of mechanical shocks due to package motions on the dynamic stability of a fully clamped rectangularmicro-plate. Numerical results reveal that the intrinsic size dependence of materials on thickness affects the stability region, and the dynamic response of the micro-plate. The results obtainedfrom the modified couple stress theory show that the classical theory overestimates thedeflection of the micro-plate in smaller thicknesses, which may lead to early instability. In contrast, the results of the modified couple stress theory are similar to those of the classicalelasticity theory in greater thicknesses. Therefore, the effect of intrinsic length-scale can beneglected in this case. In addition, studying a half-sine mechanical shock shows that changing the pulse duration can cause the dynamic shock response to become similar to the quasistaticone while changing the amplitude of the acceleration pulse can change the stable voltage values of the micro-plate. These parameters should be considered together with the pullin voltage to prevent the failure of MEMS devices under mechanical shocks.

Keywords:

Rectangular micro-plate; Material length-scale parameter; Modified couple stress Theory; Mechanical shock

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COI code: ISAV02_083

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Rashvand, Kaveh; Ghader Rezazadeh; Mehrdad Sheikhlou & Siavash Kazemirad, 2012, The response of a rectangular micro-plate to mechanical shocks considering modified couple stress theory, 2nd International Conference on Acoustics and Vibration, تهران, دانشگاه صنعتي شريف, https://www.civilica.com/Paper-ISAV02-ISAV02_083.htmlInside the text, wherever referred to or an achievement of this article is mentioned, after mentioning the article, inside the parental, the following specifications are written.
First Time: (Rashvand, Kaveh; Ghader Rezazadeh; Mehrdad Sheikhlou & Siavash Kazemirad, 2012)
Second and more: (Rashvand; Rezazadeh; Sheikhlou & Kazemirad, 2012)
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Type: state university
Paper No.: 11408
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