The purpose of this research is to study the mechanical behavior of a micropump with clamped circular diaphragm which is the main component of drug delivery systems. In this paper, the non-linear governing equations of the circular microplate using Kirchhoff thin plate theory was been extracted based on the modified couple stress (MCST) and classical (CT) theories. Then, the non-linear equation...

in the present study, modelling and vibration analysis of carbon nanotubes/ fiber/ polymer composite microplates are investigated. the governing equations of the carbon nanotubes/ fiber/ polymer composite microplates are derived based on first order shear deformation plate theory, rather than other plate theories, due to accuracy and simplicity of polynomial functions. the modified couple stres...

The study of culture in international relations theories takes a wide range of complex issues, which without enough perception about these issues, certainly our understanding about the role of culture in international relations theories will be incomplete. Since in real world the study of international affairs is best understood as traditional competition between traditional mainstream theories...

ABSTRACT Numerous engineering applications exist for the piezoelectric effect, which results from electromechanical coupling between electrical and mechanical fields. In-plane vibrations of plates’ resonance frequencies associated mode shapes have been thoroughly investigated. However, analytical solutions in-plane-dominated thick circular plates are limited. In this paper, higher-order plate t...

Understanding scientific theories like evolution by natural selection, classical mechanics, or plate tectonics requires knowledge restructuring at the level of individual concepts, or conceptual change. Here, we investigate the role of cognitive reflection (Frederick, 2005) in achieving conceptual change. College undergraduates (n = 184) were administered a 45question survey probing their under...

In this study, a dynamic Mindlin–Reissner-type plate is developed based on simplified version of Mindlin’s form-II first-strain gradient elasticity theory. The governing equations motion and the corresponding boundary conditions are derived using general virtual work variational principle. presented model contains, apart from two classical Lame constants, one additional microstructure material ...