Results 21 to 30 of about 167,469 (308)
Cylindrical thin-shell wormholes and energy conditions [PDF]
, 2012 We prove the impossibility of cylindrical thin-shell wormholes supported by matter satisfying the energy conditions everywhere, under reasonable assumptions about the asymptotic behaviour of the - in general different - metrics at each side of the throat.
CLAUDIO SIMEONE +4 more
core +2 more sources
Static analysis of axisymmetric 3-D layered transversely isotropic thick cylindrical shells by displacement potential function [PDF]
مهندسی عمران شریف, 2022 This work considers an effective analytical method based on Displacement Potential Function (DPF) for solving 3-D thick and multi-layered transversely isotropic linearly elastic cylindrical shells (non-homogeneous in radial direction) with simply ...
Z. Mohamadi +2 more
doaj +1 more source
Applied and Computational Mechanics, 2020 The results obtained from previous studies on the acoustic scattering of a plane wave by an elastic cylindrical shell, show that the acoustic resonances of the shell are related to its physical and geometrical properties.
Khandouch Y. +3 more
doaj +1 more source
Three-Dimension Crack Propagation Behavior of Conical-Cylindrical Shell
Metals, 2023 The conical-cylindrical shell is prone to stress concentration in the convex cone position under the action of deep-sea pressures. This results in unidirectional or bidirectional positive tensile stresses on the surfaces of the shell.
Yongmei Zhu, Jiahao Yang, Hongzhang Pan
doaj +1 more source
Melting behavior of ultrathin titanium nanowires [PDF]
, 2002 The thermal stability and melting behavior of ultrathin titanium nanowires with multi-shell cylindrical structures are studied using molecular dynamic simulation. The melting temperatures of titanium nanowires show remarkable dependence on wire sizes and
B.H. Hong +41 more
core +3 more sources
Forced Vibration Analysis for a FGPM Cylindrical Shell
Shock and Vibration, 2013 This article presents an analytical study for forced vibration of a cylindrical shell which is composed of a functionally graded piezoelectric material (FGPM).
Hong-Liang Dai, Hao-Jie Jiang
doaj +1 more source
Failure mode analysis of composite cylindrical shell structure under underwater explosion
Zhongguo Jianchuan Yanjiu, 2023 ObjectiveIn order to improve the explosion and impact resistance of the protective structures of unmanned underwater vehicles (UUVs), autonomous underwater vehicles (AUVs), air bottles, etc., the structural response and failure modes of carbon fiber ...
Kun YANG +3 more
doaj +1 more source
Nanomaterials, 2023 The free vibration of functionally graded porous cylindrical shell panels reinforced with graphene platelets (GPLs) was numerically investigated. The free vibration problem was formulated using the first-order shear deformation shell theory in the ...
Jin-Rae Cho
doaj +1 more source
Cylindrical thin-shell wormholes
, 2004 A general formalism for the dynamics of non rotating cylindrical thin-shell wormholes is developed. The time evolution of the throat is explicitly obtained for thin-shell wormholes whose metric has the form associated to local cosmic strings. It is found
A. Arazi +33 more
core +1 more source
Analysis of the input power flow characteristics of cylindrical shells with combination boundaries
Journal of Low Frequency Noise, Vibration and Active Control, 2019 In this study, the input power flow problem of the cylindrical shell with complex acoustic boundaries was investigated. According to the acoustic characteristic of control domain which combination free interface and rigid wall interface at the same time ...
Luyun Chen, Yong Liu
doaj +1 more source