“…It is an established fact (Draganescu and Capalnasan, 2003;Draganescu, 2006;Dra˘ga˘nescu et al, 2010;Ke and Espinosa, 2004) that mechanical motion of the elements of micro-and nano-devices is examined inconnection with nonlinear forces of quantum nature similar to the Casimir force. Moreover, the anelastic properties of materials are nonlinear in nature (see Draganescu, 2006;Dra˘ga˘nescu et al, 2010;Ke and Espinosa, 2004;He, 2008a, and the references therein). The Casimir effect consists in the electrical polarization of two perfectly conducting bodies, the Casimir force taking significant values when the separation between these bodies is reduced to less than 100 nm.…”