Results 21 to 30 of about 2,710 (264)

A Compact 2-DOF Piezoelectric-Driven Platform Based on “Z-Shaped” Flexure Hinges

open access: yesMicromachines, 2017
A compact 2-DOF (two degrees of freedom) piezoelectric-driven platform for 3D cellular bio-assembly systems has been proposed based on “Z-shaped” flexure hinges. Multiple linear motions with high resolution both in x and y directions are achieved. The “Z-
Jianping Li, Hui Liu, Hongwei Zhao
doaj   +1 more source

Seismic Performance of Reinforced Concrete Short Columns Subjected to Freeze–Thaw Cycles

open access: yesApplied Sciences, 2019
Previous research shows that freeze−thaw cycles represent one of the most dangerous threats to reinforced concrete (RC) structures. However, there is almost no experimental data on the effects of freeze−thaw cycles on the seismic behavior of ...
Yixin Zhang   +4 more
doaj   +1 more source

Flexural Strength of Steel Fiber Ultra High Strength Concrete Beams under Static and Repeated Loads

open access: yesTikrit Journal of Engineering Sciences, 2020
The goal of the present work is to study the performance of Ultra High Strength Con-crete (UHSC) beams in flexure under static and repeated loads. The main considered variables are the main reinforcement ratios which are (0.0129, 0.0204, and 0.0323), and
Nadiya Sadeek Alsaffar   +2 more
doaj   +1 more source

Static and Motional Feedthrough Capacitance of Flexural Microresonator [PDF]

open access: yesActive and Passive Electronic Components, 2011
The present paper evaluates the static and motional feedthrough capacitance of a silicon carbide-based flexural-mode microelectromechanical system resonator. The static feedthrough capacitance was measured by a network analyzer under atmospheric pressure.
openaire   +2 more sources

Bending of Shear Deformable Plates Resting on Winkler Foundations According to Trigonometric Plate Theory [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2018
A trigonometric plate theory is assessed for the static bending analysis of plates resting on Winkler elastic foundation. The theory considers the effects of transverse shear and normal strains.
Atteshamuddin Sayyad, Yuwaraj M. Ghugal
doaj   +1 more source

Enhancing Dynamic Bandwidth of Amplified Piezoelectric Actuators by a Hybrid Lever and Bridge-Type Compliant Mechanism

open access: yesActuators, 2022
Ongoing interests in high-speed precision actuation continuously sparks great attention on developing fast amplified piezoelectric actuators (APAs) with compliant mechanisms. A new type of APA with enhanced resonance frequency is herein reported based on
Mingxiang Ling   +4 more
doaj   +1 more source

Differentiation and Distribution of Marrow Stem Cells in Flex-Flow Environments Demonstrate Support of the Valvular Phenotype. [PDF]

open access: yesPLoS ONE, 2015
For treatment of critical heart valve diseases, prosthetic valves perform fairly well in most adults; however, for pediatric patients, there is the added requirement that the replacement valve grows with the child, thus extremely limiting current ...
Sasmita Rath   +3 more
doaj   +1 more source

FRP Poles: A State-of-the-Art-Review of Manufacturing, Testing, and Modeling

open access: yesBuildings, 2022
Fiber-reinforced polymers poles were on the increase because they were lightweight, have high strength-to-weight ratios, provide corrosion resistance, can be customized to meet strength and deflection requirements, and have a low life-cycle cost of ...
Ahmed M. EL-Fiky   +6 more
doaj   +1 more source

Experimental investigation of properties of GFRP foam cored sandwich joints

open access: yesMATEC Web of Conferences, 2018
Presented paper focuses on intermediate outcomes of the bilateral project between the Faculty of Mechanical Engineering, STU in Bratislava, Slovakia and the Institute of Automotive and Transport Engineering, UBFC in Nevers, France.
Gulanová Jana   +3 more
doaj   +1 more source

Effect of Hot-Wet Storage Aging on Mechanical Response of a Woven Thermoplastic Composite

open access: yesAerospace, 2020
The effect of hot-wet storage aging on the mechanical response of a carbon fiber polyether ether ketone (PEEK)-matrix woven composite has been studied. A wide range of static loads and selected cyclic load tests on the interlaminar fatigue strength were ...
Theofanis S. Plagianakos   +5 more
doaj   +1 more source

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