Results 41 to 50 of about 1,590 (240)

Geometric nonlinear free vibration of axially functionally graded non-uniform beams supported on elastic foundation

open access: yesCurved and Layered Structures, 2016
In the present study non-linear free vibration analysis is performed on a tapered Axially Functionally Graded (AFG) beam resting on an elastic foundation with different boundary conditions.
Lohar Hareram   +2 more
doaj   +1 more source

Continuum Robots in Surgery: From Engineering Design to Clinical Practice

open access: yesAdvanced Robotics Research, EarlyView.
The hyper‐redundant nature of continuum robot structures enables near‐infinite degrees of freedom leading to immense potential for medical applications. This review provides a historical background of continuum robots and novel ideas shaping their progress to current structural design, sensing technology, modeling techniques, and control methods.
Griffin Smith   +6 more
wiley   +1 more source

Theoretical analysis of dynamic response of irregularly shaped piles under vertical dynamic loading

open access: yesYantu gongcheng xuebao
The piles with irregularly shaped cross-sections are increasingly prevalent in engineering applications, yet the theoretical researches in this area remain relatively scarce.
ZHOU Hang 1, 2, WANG Yisheng 1, 2, LI Yunzhou 1, 2
doaj   +1 more source

Vibration and Static Analysis of Functionally Graded Porous Plates [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2017
This research deals with free vibration and static bending of a simply supported functionally graded (FG) plate with the porosity effect. Material properties of the plate which are related to its change are position-dependent.
Şeref Doğuşcan Akbaş
doaj   +1 more source

A Critical Time Window of Neocortex Modulation for Remote Fear Memory in Rats and Humans

open access: yesAdvanced Science, EarlyView.
This study identifies a delayed consolidation window around 18 h after fear learning in the mPFC essential for remote fear memory. VTA dopaminergic input during this window sustains remote memory in rats, while non‐invasive stimulation of homologous human mPFC at the corresponding time selectively weakens remote but not recent fear memory, revealing a ...
Lu Cao   +19 more
wiley   +1 more source

The Effect of Residual Stress on the Electromechanical Behavior of Electrostatic Microactuators

open access: yesActive and Passive Electronic Components, 2008
This work simulates the nonlinear electromechanical behavior of different electrostatic microactuators. It applies the differential quadrature method, Hamilton's principle, and Wilson-θ integration method to derive the equations of motion of ...
Ming-Hung Hsu
doaj   +1 more source

Free vibration of functionally graded sandwich plates with stiffeners based on the third-order shear deformation theory

open access: yesVietnam Journal of Mechanics, 2016
In this paper, the free vibration of functionally  sandwich grades plates with stiffeners is investigated by using the finite  element method. The material properties are assumed to be graded in the  thickness direction by a power-law distribution ...
Pham Tien Dat   +2 more
doaj   +1 more source

The Importance of Metal‐Organic Framework Linker Atoms for CO2 Reduction: A DFT Study

open access: yesAdvanced Science, EarlyView.
Using DFT, we examine the role of linker atoms in CO2 reduction on copper‐based metal organic frameworks (Cu MOFs). Our calculations reveal that linker atoms may serve as both CO2 and H‐shuttling sites and suggest linker electrostatics as a descriptor for linker activity. ABSTRACT Although the metal within the secondary building unit of a metal‐organic
Ugochukwu Nwosu, Samira Siahrostami
wiley   +1 more source

Stability and vibration in civil engineering [PDF]

open access: yesGrađevinski Materijali i Konstrukcije, 2014
Von Kármán theory has been used for the description of the post-buckling behaviour of a thin- walled panel with imperfections and residual stresses.
Ravinger Ján
doaj   +1 more source

Generalized Hamilton's principle with fractional derivatives [PDF]

open access: yesJournal of Physics A: Mathematical and Theoretical, 2010
We generalize Hamilton's principle with fractional derivatives in Lagrangian $L(t,y(t),{}_0D_t^\al y(t),α)$ so that the function $y$ and the order of fractional derivative $α$ are varied in the minimization procedure. We derive stationarity conditions and discuss them through several examples.
Atanacković, Teodor   +3 more
openaire   +3 more sources

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