The present work reports the static behaviour of functionally graded rotating beam based on Timoshenko theory, which includes effect shear deformation. principle virtual displacement is applied to derive a governing equation for (FG) beam, considering centrifugal stiffening effect. B-spline collocation technique employed solve differential and material properties are function power law distribu...

A signal of positrons above background has been observed in collisions of a low emittance GeV electron beam with terawatt pulses from a Nd glass laser at nm wavelengths in an experiment at the Final Focus Test Beam at SLAC The positrons are interpreted as arising from a two step process in which laser photons are backscat tered to GeV energies by the electron beam followed by a collision be twe...

Fluorinated graphene/ultra high molecular weight polyethylene (FG/UHMWPE) composites were prepared by ultrasonic dispersion and hot pressing. The mechanical propertys and tribological property of pure UHMWPE and FG/UHMWPE composites were investigated by micro hardness tester and high-speed reciprocating friction tester. The wear volume of the sample was measured by the scanning electron microsc...

This paper examines five different models of electron thermal transport in laser produced spherical implosions. These are classical, classical with a flux limit f , delocalization, beam deposition model, and Fokker-Planck solutions. In small targets, the results are strongly dependent of f for flux limit models, with small f ’s generating very steep temperature gradients. Delocalization models ...

Abstract Nano-kirigami method enables rich diversity of structural geometries that significantly broaden the functionalities optical micro/nano-devices. However, methodologies various nano-kirigami are still limited and as a result, chiral structure has yet been pushed to limit for operation at visible wavelength region. Here, merits strategies comprehensively explored bio-inspired nano-cilia m...

This study presents nonlinear vibration of functionally graded-graphene platelet-reinforced composite (FG-GPLRC) beams under various time-dependent forces. Their material distributions are characterized by continuous functions with four patterns reinforcement which uniform, linear and parabolic I II. The third-order shear deformation theory is used to represent the displacement fields, while ge...

In the design of high Quality factor (Q) micro or nano beam resonators, different dissipation mechanisms may have damaging effects on the quality factor. One of the major dissipation mechanisms is the thermoelastic damping (TED) that needs an accurate consideration for prediction. In this paper, thermoelastic damping of the longitudinal vibration of a homogeneous micro beam with both ends clamp...