Mechanics of Microelectromechanical Systems - N Lobontiu and E Garcia Part 12 doc

... more generic case where the area is variable, to: where it has been taken into account that the elementary volume can be expressed in terms of the cross-sectional area A and the elementary length ... stiffnesses or compliances, namely: two direct (linear and rotary) and one crossed, define the elastic response at the free end of a cantilever. More details on the spring characterizat...

Ngày tải lên: 10/08/2014, 05:20

... indeterminate, the reactions and need to be first determined, by using the corresponding boundary conditions: which can be expressed as: The bending moment is: The unknown reactions are: The horizontal ... microbridges 67 in the oscillating mode – when the modal frequencies are actually monitored and determined. They can operate in a contact mode or in a non-contact mode (when a pre-desig...

Ngày tải lên: 10/08/2014, 05:20

... set of experimental measurements, for instance the deflection at a point placed at a distance from the free end, is needed. In this case, the deflection at the experimental point of detection is: Equations ... microcantilever to the performance of a right elliptically-filleted one when and is the friction force between the microcantilever tip and the investigated three- dimensional...

Ngày tải lên: 10/08/2014, 05:20

... the springs. A serpentine spring is formed of one or several series-connected units, as the one shown in Fig. 3.24, where also indicated are the defining geometric parameters of the unit. When ... (the stiffness defining the elastic properties of the U-spring when the body translates about a direction perpendicular to the main one and is contained in the plane of the microdevice) a...

Ngày tải lên: 10/08/2014, 05:20

... end deflection and slope can be found and expressed in the known manner: The equations of the three global compliances entering Eqs. (2.166) are quite complex and are not given explicitly here. ... determined with respect to the free end. Example 2.18 Find the bending-related compliances connected to the midpoint of a microcantilever of length l and of constant cross-section i...

Ngày tải lên: 10/08/2014, 05:20

... and therefore a symmetry center) and that bending moments and shearing forces act about these axes. Similarly, the complementary energy can be expressed in terms of loading, and in the case of ... for the more generic case where the area is variable, to: where it has been taken into account that the elementary volume can be expressed in terms of the cross-sectional area A and...

Ngày tải lên: 27/06/2014, 18:20

... contribute to a more solid understanding of the principles governing the mechanics of MEMS, and would hopefully enhance the efficiency of modeling and designing reliable and desirably-optimized ... relevant components that are applied between one end point of the member (the free end of Fig. 1 .12 is a convenient choice because it does not introduce any reactions, which are...

Ngày tải lên: 13/02/2014, 08:20

... while for the drawn samples the temperature dependence is weaker, seems secondary. For these samples has a stronger dependence of the observed effects from the mechanical influence, respectively ... the nature, mechanism and kinetics of the justifying processes and the relationship between them. Therefore the study of these processes is a permanent "ever green" interes...

Ngày tải lên: 19/06/2014, 12:20

... condensation temperature decreases and the temperature evaporation increases. Besides, we note that in the first part of the curve, the COP increases with an increase of the generator temperature until ... the production of desired cold), the condensation temperature (function of cooling temperature of the absorber and condenser components) and finally generator temperatu...

Ngày tải lên: 19/06/2014, 12:20

... Consequently life can not exist without its environment: both are the necessary components of the system, because life depends on exchange of matter and energy between a concrete entity, like ... t 2 ). We have to underline these concepts, because the development of neg-entropy is needed in the evolution of natural systems, like landscapes and vegetation ones. As expressed b...

Ngày tải lên: 19/06/2014, 12:20