Results 51 to 60 of about 554,398 (245)

Progressive wave: a new multisource vibration technique to assist forming processes - kinematic study, simulation results and design proposition [PDF]

open access: yes, 2013
Use of vibration in the forming process has already shown numerous advantages in the improvement of mechanical and surface properties of workpiece such as good surface or less friction between die and workpiece.
NGUYEN, Thanh Hung   +5 more
core  

Ultrasonic transducers for wideband attenuation measurements [PDF]

open access: yes, 1987
Includes bibliographical references.An application of ultrasound presently being investigated at the Council for Mineral Technology {MINTEK) is the measurement of the concentration of graphite particles in suspension in an agitated pulp. The principle of
Mayer, J Bertrand
core   +1 more source

Human emotional response to steering wheel vibration in automobiles [PDF]

open access: yes, 2013
This is the post-print (final draft post-refereeing) version of the final published paper that is available from the link below. Copyright @ 2013 Inderscience Enterprises Ltd.This study investigates what form of correlation may exist between measures of ...
Shabani, A   +7 more
core   +1 more source

From Bulk to Colloidal Nanocrystals: Top‐Down Synthesis of Highly Luminescent Cs2ZrCl6:Te4+ Double Perovskite Nanocrystals for X‐Ray Imaging

open access: yesAdvanced Functional Materials, EarlyView.
Top‐down ultrasonication produces highly emissive Cs2ZrCl6:Te4+ nanocrystals (NCs) with a PLQY of 65%, which is higher compared to that of the NCs synthesized by typical bottom‐up hot‐injection synthesis. The colloidal Cs2ZrCl6:Te4+ NCs have been found to be potential candidates for x‐ray scintillation imaging.
Yang Liu   +12 more
wiley   +1 more source

Experimental study on chip shape in ultrasonic vibration–assisted turning of 304 austenitic stainless steel

open access: yesAdvances in Mechanical Engineering, 2019
There are many problems and physical phenomena in turning process, like machined surface quality, cutting force, tool wear, and so on. These factors and the chip shape of workpiece materials, which is an important aspect to study the mechanism of ...
Yingshuai Xu   +3 more
doaj   +1 more source

Charge‐Polarized Ni─S4 Single‐Atom Sites Drive Selective Photoreforming of Poly(lactic acid) to Lactate and Hydrogen

open access: yesAdvanced Functional Materials, EarlyView.
Atomically dispersed Ni–S4 sites on CdS nanorods induce interfacial charge polarization, directing photogenerated electrons to H2 evolution and holes to selective ester‐bond cleavage of poly(lactic acid). Without sacrificial reagents, this charge‐coupled system produces lactate while suppressing overoxidation, achieving an H2 evolution rate of 41.74 ...
Yu Yao   +8 more
wiley   +1 more source

Enhancing engagement behavior in small-diameter deep drilling through ultrasonic vibration-assisted drilling and quantitative evaluation of hole dimensions

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing
This study investigates the effects of ultrasonic vibration-assisted drilling with a 0.3 mm diameter drill on engagement behavior and hole dimensions.
Naofumi TSUJI   +6 more
doaj   +1 more source

A Novel Ultrasonic Trepanning Method for Nomex Honeycomb Core

open access: yesApplied Sciences, 2020
The vertical surface is a common and typical characteristic structure among Nomex honeycomb core components. However, the conventional high-speed milling and ultrasonic cutting struggle to meet the high-quality machining requirements of a vertical ...
Dingyi Sun   +4 more
doaj   +1 more source

Sacrificial‐Layer‐Assisted Heat‐Affected‐Zone Suppression in Laser Patterning of PET for High‐Performance Flexible Devices

open access: yesAdvanced Functional Materials, EarlyView.
A removable sacrificial polymer layer engineers the thermal boundary condition during nanosecond laser ablation of PET, suppressing heat‐affected‐zone formation without relying on costly ultrafast lasers. This strategy enables deep, high‐aspect‐ratio trenches with no detectable heat‐affected zone, templating silver‐filled mesh electrodes with record ...
Mehdi Zarei   +3 more
wiley   +1 more source

Experimental and numerical studies on low velocity impacts detection and damage identification in metal and composite structures using ultrasonic waves propagation (Lamb waves) [PDF]

open access: yes, 2011
In this thesis a theoretical base required for the development of a reliable structural health monitoring system based on ultrasonic guided waves is considered.
Tancredi, Simone
core   +1 more source

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