This paper presents a unified solution method to investigate the free vibration behaviors of laminated composite conical shell, cylindrical and an annular plate with variable thickness arbitrary boundary conditions using Haar wavelet discretization (HWDM). Theoretical formulation is established based on first-order shear deformation theory (FSDT), displacement components are extended series in ...

This paper presents finite element analysis of the strength of roadheaher conical picks. Failure forms of conical picks are investigated, and the FE model of conical pick is established based on ANSYS. The static analysis is carried out according to the load calculated by empirical formula and the deformation map and stress distribution are obtained. The results show that the maximum stress of ...

We study the thermodynamics of ${\mathrm{AdS}}_{4}$ black hole solutions Einstein-Maxwell theory that are accelerating, rotating, and carry electric magnetic charges. focus on class for which horizon is a spindle can be uplifted regular Sasaki-Einstein spaces to give $D=11$ supergravity free from conical singularities. use holography calculate Euclidean on-shell action define set conserved char...

This paper presents finite element analysis of the strength of roadheaher conical picks. Failure forms of conical picks are investigated, and the FE model of conical pick is established which is based on ANSYS. The static analysis is carried out according to the load calculated by empirical formula and the deformation map and stress distribution is obtained. The results show that the maximum st...

We compute the on-shell Euclidean action of Schwarzschild-de Sitter black holes, and take their contributions in gravitational path integral into account using formalism constrained instantons. Although de hole geometries have conical singularities for generic masses, is finite shown to be independent time periodicity equal minus sum cosmological horizon entropy. apply this result probability a...

Tower cost makes up an important part in the whole wind turbine construction especially for offshore farms. The main method to reduce tower is weight by optimum design. This paper proposes a two-level optimization criterion optimal design of steel conical considering different structural reliability and uncertainty, along with discreteness variables such as thickness bolt type. In first level, ...

Ti conical island structures were fabricated using photolithography and the reactive ion etching method. The resulting conical island structures were anodized in ethylene glycol solution containing 0.25 wt% NH4F and 2 vol% H2O, and conical islands composed of TiO2 nanotubes were successfully formed on the Ti foils. The conical islands composed of TiO2 nanotubes were employed in photoelectrodes ...

In this paper, crashworthiness characteristics of conical steel tubes stiffened by annular rings and rigid polyurethane foam are investigated. For this purpose, wide circumferential rings are created from the outer surface of the conical tube at some determined areas along tube length. In fact, this method divides a long conical tube into several tubes of shorter length. When this structure is ...

We demonstrate material phase identification by measuring polychromatic diffraction spots from samples at least 20 mm in diameter and up to 10 mm thick with an energy resolving point detector. Within our method an annular X-ray beam in the form of a conical shell is incident with its symmetry axis normal to an extended polycrystalline sample. The detector is configured to receive diffracted flu...