Results 31 to 40 of about 28,413 (256)

Performance Analysis of Polymer Additive Manufactured Gear Bearings

open access: yesApplied Sciences, 2023
Bearings in general, and in this case rotational bearings, are important elements in many machines. The main objective of this study was to find out the load-bearing capacity of 3D-printed gear bearings under various rotational speeds, test the bearings ...
Cristian Moldovan, Carmen Sticlaru
doaj   +1 more source

On the form of growing strings

open access: yes, 2005
Patterns and forms adopted by Nature, such as the shape of living cells, the geometry of shells and the branched structure of plants, are often the result of simple dynamical paradigms.
A. Maritan   +12 more
core   +1 more source

Investigation of Batch Intensive Quenching Processes When Using Hydrodynamic Emitters in Quench Tanks [PDF]

open access: yes, 2016
The paper discusses patented in Ukraine a new intensive quenching IQ–2 technology based on film boiling resonance effect [1]. Namely, the paper discusses improving of the batch intensive quenching (IQ) process known as IQ-2 method by the use of ...
Kobasko, N. (Nikolai)
core   +2 more sources

A high-power-density design method for polymer gear systems via an adaptive non-dominated sorting genetic algorithm III and surrogate sub-models

open access: yesMaterials & Design
There is a growing and prevalent trend in the power transmission field of high-performance polymers replacing metallic materials given the strict light-weight requirement.
Zehua Lu   +4 more
doaj   +1 more source

A review on failure characteristics of polymer gear

open access: yesMATEC Web of Conferences, 2017
Polymer are now widely used as substitute material for steel gear in low load devices. Its failure differs from gears made of steel, thus it is important to categorize the failures shown by polymer gears.
Md Ghazali Wafiuddin   +4 more
doaj   +1 more source

A Laplace Transform Method for Molecular Mass Distribution Calculation from Rheometric Data

open access: yes, 2017
Polydisperse linear polymer melts can be microscopically described by the tube model and fractal reptation dynamics, while on the macroscopic side the generalized Maxwell model is capable of correctly displaying most of the rheological behavior.
C. Lang   +4 more
core   +1 more source

Quantifying Dimensional Accuracy of a Mask Projection Micro Stereolithography System [PDF]

open access: yes, 2004
Mask Projection Microstereolithography is capable for fabricating true three-dimensional microparts and hence, holds promise as a potential micro-fabrication process for micro-machine components.
Limaye, Ameya, Rosen, David
core   +1 more source

Study on Liquid Crystal-Polymer Gears.

open access: yesTRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C, 1995
Attention has been paid to liquid-crystal polymers (hereinafter called LCP) as plastics of the next generation since these have features of high rigidity and small thermal expansion coefficient in addition to excellent heat resistance. Accordingly, in industry, application of LCP to gear materials has been attempted, but at present, data for ...
Naohisa Tsukamoto   +2 more
openaire   +2 more sources

MAGTWIST: A Magnetically‐Driven Rotary Actuator Using a Traveling‐Wave With Integrated Stiffness Tunability

open access: yesAdvanced Functional Materials, EarlyView.
MAGTWIST: A compact magnetic rotary actuator, enabling smooth, stepless rotation, and on‐demand locking. Inspired by peristalsis, a soft polymer belt generates a traveling‐wave, enabling 270° rotation when heated. Cooling stiffens the belt, locking it in position and enabling it to withstand high loads.
Simon Frieler   +3 more
wiley   +1 more source

Geometrical Analysis of 3D-Printed Polymer Spur Gears

open access: yesMachines
In this paper, we are looking for the answer to the following question: what geometric deviations do polymer gears made by 3D printing have from the theoretical geometry?
Levente Czégé, Gábor Ruzicska
doaj   +1 more source

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