in many cases, a torsional shaft may be a thick-walled radially inhomogeneous cylindrical object. the hollow shafts made of functionally graded materials (fgms) are such kind of compositions which were studied in this paper. cylindrical fg shafts are composed of ceramic and metallic parts with power function distribution across the radial direction. the ceramic phase is isotropic elastic and th...

An analytical (exact in the limit) solution to boundary-value problem of deformation a finite-dimensional general cross-ply thick hyperbolic-paraboloidal panel, modeled using third order shear theory, is presented. Of special interest issue cylindrical panel-like response, presence full surface-parallel constraints at all four edges antisymmetric panel negative Gaussian curvature.

We make use of deep HST, VLT, Spitzer and Chandra data on the Chandra Deep Field South to constrain the number of Compton thick AGN in this field. We show that sources with high 24μm to optical flux ratios and red colors form a distinct source population, and that their infrared luminosity is dominated by AGN emission. Analysis of the X-ray properties of these extreme sources shows that most of...