Results 81 to 90 of about 14,541 (297)

Free Vibration of Single Walled Carbon Nanotube Resting on Exponentially Varying Elastic Foundation

open access: yesCurved and Layered Structures, 2018
In this article, free vibration of SingleWalled Carbon Nanotube (SWCNT) resting on exponentially varying Winkler elastic foundation is investigated by using Differential Quadrature Method (DQM).
Chakraverty Snehashish   +1 more
doaj   +1 more source

Free Vibration Analysis of Beams on Variable Winkler Elastic Foundation by Using the Differential Transform Method

open access: yes, 2011
In this study, free vibration of an Euler-Bernoulli beam resting on a variable Winkler foundation is considered. Structures which are supported along their length such as beams or pipelines resting on elastic soil are very commonly modeled with a Winkler
H. Tan, Metin Kaya, Alev Kacar
core   +1 more source

Seismic analysis and design of tunnels within fault ground: A review

open access: yesDeep Underground Science and Engineering, EarlyView.
The research methods of seismic response of tunnels within fault ground, including field investigations, analytical solutions, physical experiments, and numerical simulations, and seismic countermeasures are discussed. The present study examines the shortcomings and limitations of the current research and design, and puts forward proposals for future ...
Xingda Wang   +6 more
wiley   +1 more source

MODES OF VIBRATION OF THE BEAMS UNDER THE INFLUENCE OF DISCONTINUITY IN FOUNDATION

open access: yesFacta Universitatis. Series: Mechanical Engineering, 2014
Vibrations of the Timoshenko beams resting on the Winkler and Pasternak elastic foundation with discontinuity are investigated in this paper. A p-version finite element method that accounts for shear deformation is used.
Vladimir Stojanović, Pedro Ribeiro
doaj  

Simplified Calculation Method for Existing Tunnel Settlement Caused by Shield Under-passing Based on Timoshenko-PasternakModel

open access: yesChengshi guidao jiaotong yanjiu
Objective It is aimed to tackle the inefficient accuracy of traditional Euler-Bernoulli beam and Winkler foundation model in calculating settlement induced by shield under-passing existing tunnels. Method Based on the Timoshenko beam theory and Pasternak
WANG Liang   +3 more
doaj   +1 more source

Investigation on tunnel stability considering pipe‐roof support with transparent soil technology

open access: yesDeep Underground Science and Engineering, EarlyView.
This study integrates transparent soil technology, 3D reconstruction and numerical simulation to captures the full‐field deformation of shield tunnel instability. Results demonstrate that pipe‐roof support enhances stability via the “soil‐arching barrier effect,” effectively restraining failure wedge development by extending stress transfer paths ...
Zhi Jia   +4 more
wiley   +1 more source

The Euler-Bernoulli beam on a tensionless Winkler foundation: a simple problem of receding contact

open access: yes, 2018
A steel ruler supported by a flexible foam foundation, modelled as an Euler-Bernoulli beam on a Winkler foundation, exhibits receding contact when subjected to a point load.
Stephen, Neil, Ch'ng, Sy
core   +2 more sources

Transition foundation modulus for the vibration problem of uniform initially stressed simply supported beams on Winkler foundation

open access: yes, 2003
92-94The phenomenon of the existence of a transition foundation stiffness for the buckling problem of a simply supported column on Winkler foundation is well -known.
Rao, G Venkateswara
core  

Bending analysis of nano-sized beam-elastic substrate systems: Unification of the stress-driven nonlocal model and Winkler-Pasternak foundation model

open access: yesResults in Engineering
Nano- and micro-scale beam–substrate assemblies are key components of sensors, actuators, and flexible electronics, yet their mechanical responses deviate from classical elasticity because intrinsic material length scales govern their behavior.
Suchart Limkatanyu   +6 more
doaj   +1 more source

Risk of Head and Neck Cancer in Former Smokers by Subsite: A Multicenter Analysis From the INHANCE Consortium

open access: yesInternational Journal of Cancer, EarlyView.
Tobacco use and alcohol consumption are primary risk factors for head and neck squamous cell carcinoma, with combined use occurring in three‐quarters of cases. This large international study of former smokers shows that the risk reduction effect of smoking cessation occurs more slowly for laryngeal cancer than for other head and neck cancer subsites ...
Matheus de Abreu   +41 more
wiley   +1 more source

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