Results 51 to 60 of about 46,918 (252)

Effect of process parameters on average grain size and microscopic uniformity of the three-roll skew rolling forming of the railway hollow shaft

open access: yesMetalurgija, 2020
The average grain size and microstructure uniformity are the key factors determining the mechanical properties of the hollow shaft. In order to obtain a fine and uniform microstructure, a finite element model of threeroll skew rolling hollow shaft for ...
J. T. Wang, X. D. Shu, S. Zhang
doaj  

Multi-objective optimization design and reliability analysis of idler with hollow step-shaft

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2019
Idlers, one of the important parts of belt conveyors, are substantial and constitute approximately one-third of the equipment cost. Therefore, idlers in conveyor systems must be optimized.
Jinhu SU, Wenjun MENG, Xiaoxia ZHAO
doaj   +1 more source

Two-plane balance and slip-ring design [PDF]

open access: yes, 1985
A 3.25 cm (1.28 in.) two plane balance and eight channel slip ring assembly has been designed to measure and transmit the thrust (667-N;150-lb) and torque (135-N-m;100-lb-ft) components produced by wind tunnel model turboprops and drive motors operating ...
Luna, P. M.
core   +1 more source

Under the Shade of a Coolabah Tree: A Second Cache of Tulas From the Boulia District, Western Queensland

open access: yesArchaeology in Oceania, EarlyView.
ABSTRACT This paper reports on the excavation of a cache of stone artefacts, buried on the bank of a waterhole or ‘billabong’ in central western Queensland. This is an extremely rare find, and yet it is the second such site to be reported within less than a 10 km radius.
Yinika L. Perston   +5 more
wiley   +1 more source

Dynamic response of a shaft in dry sands [PDF]

open access: yes, 1994
In order to study the dynamic behavior of a shaft in soil during earthquakes, dynamic centrifuge tests were carried out. Two types of models were taken up; (1) level ground of sand; and (2) a hollow shaft of two different depth embedded into the level ...
Hayashi, H.   +4 more
core  

The flexible, the stereotyped and the in‐between: putting together the combinatory tool use origins hypothesis

open access: yesBiological Reviews, EarlyView.
ABSTRACT Tool use research has long made the distinction between tool using that is considered learned and flexible, and that which appears to be instinctive and stereotyped. However, animals with an inherited tool use specialisation can exhibit flexibility, while tool use that is spontaneously innovated can be limited in its expression and facilitated
Jennifer A. D. Colbourne   +1 more
wiley   +1 more source

Analysis of the Dynamic Behavior of a Rotating Composite Hollow Shaft

open access: yesLatin American Journal of Solids and Structures
In the present paper, a simplified homogenized beam theory is used in the context of a numerical investigation regarding the dynamic behavior of a rotating composite hollow shaft.
Aldemir Ap Cavalini Jr   +3 more
doaj   +1 more source

Zero gravity separator Patent [PDF]

open access: yes, 1966
Describing apparatus for separating gas from cryogenic liquid under zero gravity and for venting gas from fuel ...
Pope, A. M., Rosin, A. D.
core   +1 more source

Automated Process Optimization in a Novel Triple Shaft Mixer with Adaptive Mixing Modes

open access: yesChemie Ingenieur Technik, EarlyView.
A novel multi‐purpose mixer with adjustable blade angle and a coaxial stirrer is developed, providing three degrees of freedom. An optimization strategy is integrated to autonomously identify optimal operating conditions through automated tests. The current draw of the main stirrer serves as the optimization criterion, while stirrer speeds, directions,
B. Schwarz, H. Kniele, J. A. Lindner
wiley   +1 more source

Multiobjective Optimization of Precision Forging Process Parameters Based on Response Surface Method

open access: yesAdvances in Materials Science and Engineering, 2015
In order to control the precision forging forming quality and improve the service life of die, a multiobjective optimization method for process parameters design was presented by applying Latin hypercube design method and response surface model approach.
Fayuan Zhu, Zhaohui Wang, Mi Lv
doaj   +1 more source

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