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In this work, a stochastic finite element method based on first order perturbation approach is developed for the probabilistic flutter analysis of aircraft wing in frequency domain. Here, both bending and torsional stiffness parameters of the wing are treated as Gaussian random fields and represented by a truncated Karhunen–Loeve expansion. The aerodynamic load on the wing is modeled using Theodorsen’s...
A numerical study is presented of the electroosmotic flow (EOF) and transport of ionic species through a slit soft nanochannel filled with general electrolytes. The rigid walls of the undertaken channel are coated with ion and fluid penetrable charged polyelectrolyte layers (PELs). The physicochemical properties of the surface PELs grafted on the lower and upper walls are considered to be either similar...
In this paper, an upper bound analysis is developed to calculate the rolling torque in the wire flat rolling process. Streamlines are defined parametrically in the deforming region and the formulation of the admissible velocity field are developed. The internal and frictional power terms are obtained from the upper bound solution. Through the analysis, the rolling torque is obtained. Furthermore,...
Molecular dynamics simulations of the rigid-anvil collision test are performed to achieve the complete pulverization of slender nanoprojectiles. The simulation setup mimics the traditional Taylor test (the flat-ended nanoscale bars collide with a rough rigid wall) at striking velocities that reach an awesome range from 20 km/s to 120 km/s. The objective is to investigate, so called, shattering fragmentation,...
In this paper, we tackle the control problem of continuum robots with mismatched uncertainties. Uncertainties that affect systems through any of their states and may not be directly accessed by their controllers. These uncertainties emerge in a system either due to unmodeled dynamics, practical limitations, or external disturbances. Continuum robots possess highly nonlinear dynamic behaviour due to...
Analytical solutions to the microrotation, linear velocity, and volume flow rate are developed for electrokinetic diffusioosmotic flows of micropolar liquids in slit microchannel geometries subject to general slip boundary conditions. The macroscopic viscosity coefficients relevant to the micropolar fluid flow investigated herein are expressed as functions of the solid volume fraction to consistently...
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