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 ...

TITLE: Functionally-graded sandwich design of the armor protecting a hot-vent gastropod AUTHORS (FIRST NAME, LAST NAME): Haimin Yao1, Ming Dao1, Timothy Imholt2, Subra Suresh1, Christine Ortiz1 INSTITUTIONS (ALL): 1. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambirdge, MA, USA. 2. Raytheon, Inc, Marlboro, MA, USA. ABSTRACT BODY: Recently, a gastropo...

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...

Abstract In this article, the nonlinear dynamic responses of sandwich functionally graded (FG) porous cylindrical shell embedded in elastic media are investigated. The studied here consists three layers, which outer and inner skins made solid metal, while core is FG metal foam. Partial differential equations derived by utilizing improved Donnell’s theory Hamilton’s principle. Afterwards, Galerk...

Additively manufactured polymer parts are often designed like composite sandwich structures. In this work, beam-like specimens with hexagonal, triangular and rectangular infills were different infill densities. An influence of the shape on overall stiffness was observed. The bending hexagonal between 13% 25% lower than that other two cases instead showed similar performances. Numerical simulati...

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 ...