Romesh C. Batra

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The problem of calculating the overall elastic moduli of a microcracked material is now understood relatively well, however, only under the assumption that the cracks are fixed, that is, neither grow nor shorten during loading. Such a calculation yields the secant moduli for the response stress-strain curves of microcracked materials. The present paper(More)
We study the influence of von Kármán nonlinearity, van der Waals force, and thermal stresses on pull-in instability and small vibrations of electrostatically actuated mi-croplates. We use the Galerkin method to develop a tractable reduced-order model for elec-trostatically actuated clamped rectangular microplates in the presence of van der Waals forces and(More)
— Advances in the development of nanotechnology have led to microrobots applications in medical fields. Drug delivery is one of these applications in which microrobots deliver a pharmaceutical compound to targeted cells. Chemotherapy and its side effects can then be minimized. Two major constraints, however, must be considered: the robot's onboard energy(More)
We use the modified smoothed particle hydrodynamics (MSPH) method to study the propagation of elastic waves in functionally graded materials. An artificial viscosity is added to the hydrostatic pressure to control oscillations in the shock wave. Computed results agree well with the analytical solution of the problem. It is shown that, for the same placement(More)
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