Fundamental study of laser cutting using high-speed photography

2000 ◽  
Author(s):  
Takashi Fushimi ◽  
Hideyuki Horisawa ◽  
Shigeru Yamaguchi ◽  
Nobuo Yasunaga ◽  
Tomoo Fujioka
Keyword(s):  
Laser Cutting ◽  
High Speed ◽  
High Speed Photography ◽  
Fundamental Study

Fundamental study of CO2- and fiber laser cutting of steel plates with high speed visualization technique

2014 ◽  
Vol 26 (4) ◽  
pp. 042004 ◽  
Author(s):  
Grigory V. Ermolaev ◽  
Petr V. Yudin ◽  
Francis Briand ◽  
Alexandr V. Zaitsev ◽  
Oleg B. Kovalev
Keyword(s):  
Fiber Laser ◽  
Laser Cutting ◽  
High Speed ◽  
Steel Plates ◽  
Visualization Technique ◽  
Fundamental Study

Crack divergence phenomena in tempered glass

2020 ◽  
Vol 13 (3) ◽  
pp. 115-129
Author(s):  
Shin’ichi Aratani
Keyword(s):  
Optimal Design ◽  
High Speed ◽  
Glass Plate ◽  
Acute Angle ◽  
Divergence Angle ◽  
High Speed Photography ◽  
Tempered Glass ◽  
Thick Glass

High speed photography using the Cranz-Schardin camera was performed to study the crack divergence and divergence angle in thermally tempered glass. A tempered 3.5 mm thick glass plate was used as a specimen. It was shown that two types of bifurcation and branching existed as the crack divergence. The divergence angle was smaller than the value calculated from the principle of optimal design and showed an acute angle.

Fundamental study on reduction of dross in fiber laser cutting of steel by shifting nozzle axis

2021 ◽  
Vol 33 (1) ◽  
pp. 012022
Author(s):  
Atsushi Yagi ◽  
Seigo Kadonaga ◽  
Yasuhiro Okamoto ◽  
Hiroaki Ishiguro ◽  
Ryohei Ito ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Laser Cutting ◽  
Fundamental Study ◽  
Nozzle Axis

Experimental study of hydrodynamic effects in the inverse water hydrocarbon emulsions flow in microchannels

2016 ◽  
Vol 11 (1) ◽  
pp. 30-37 ◽  
Author(s):  
A.A. Rakhimov ◽  
A.T. Akhmetov
Keyword(s):  
High Speed ◽  
Petroleum Industry ◽  
Chemical Compounds ◽  
High Viscosity ◽  
Blocking Effect ◽  
High Speed Photography ◽  
Simple Chemical ◽  
Reported Study ◽  
Dynamic Blocking ◽  
Hydrodynamic Effects

The paper presents results of hydrodynamic and rheological studies of the inverse water hydrocarbon emulsions. The success of the application of invert emulsions in the petroleum industry due, along with the high viscosity of the emulsion, greatly exceeding the viscosity of the carrier phase, the dynamic blocking effect, which consists in the fact that the rate of flow of emulsions in capillary structures and cracks falls with time to 3-4 orders, despite the permanent pressure drop. The reported study shows an increase in viscosity with increasing concentration or dispersion of emulsion. The increase in dispersion of w/o emulsion leads to an acceleration of the onset of dynamic blocking. The use of microfluidic devices, is made by soft photolithography, along with high-speed photography (10,000 frames/s), allowed us to see in the blocking condition the deformation of the microdroplets of water in inverse emulsion prepared from simple chemical compounds.

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