Theoretical and experimental study of the drawing force under a current pulse

2018 ◽  
Vol 97 (1-4) ◽  
pp. 1047-1051 ◽  
Author(s):  
Li Dalong ◽  
Li Yanting ◽  
Yu Enlin ◽  
Han Yi ◽  
Liu Feng
Keyword(s):  
Experimental Study ◽  
Current Pulse ◽  
Drawing Force ◽  
A Current

Instability of tangential discontinuities in pinching plasmas

1999 ◽  
Vol 62 (1) ◽  
pp. 117-123 ◽  
Author(s):  
S. P. TSYBENKO
Keyword(s):  
Dispersion Relation ◽  
Simple Model ◽  
Current Pulse ◽  
Current Density ◽  
Strong Dependence ◽  
Plasma Instability ◽  
Tangential Discontinuity ◽  
Instability Increment ◽  
Tangential Discontinuities ◽  
A Current

A new mechanism for the formation of pinching plasma instability related to a tangential discontinuity is discussed. With this in mind we use a simple model of the Davydov–Zakharov class. It appears that there is a strong dependence of the instability increment on current density, resulting from the corresponding dispersion relation. Modulation of a current pulse is shown to be a possible way of stabilizing powerful discharges.

Experimental study of an inverse wire array z-pinch operating as a current switch

2010 ◽  
Author(s):  
A. Harvey-Thomson ◽  
S. V Lebedev ◽  
G. N. Hall ◽  
S. N. Bland ◽  
G. Burdiak ◽  
...  
Keyword(s):  
Experimental Study ◽  
Wire Array ◽  
Current Switch ◽  
Z Pinch ◽  
A Current

Shaper of a current pulse of megaampere level with rise time of 100 ns

2011 ◽  
Author(s):  
P.V. Duday ◽  
E.V. Bochkov ◽  
V.I. Dudin ◽  
G.I. Dolgachev ◽  
V.A. Ivanov ◽  
...  
Keyword(s):  
Current Pulse ◽  
Rise Time ◽  
A Current

scholarly journals Effect of a Current Pulse on the Thermal Fatigue Behavior of Cast Hot Work Die Steel

2005 ◽  
Vol 45 (3) ◽  
pp. 410-412 ◽  
Author(s):  
Y. G. ZHAO ◽  
Y. H. LIANG ◽  
W. ZHOU ◽  
Q. D. QIN ◽  
Q. C. JIANG
Keyword(s):  
Current Pulse ◽  
Thermal Fatigue ◽  
Fatigue Behavior ◽  
Die Steel ◽  
Thermal Fatigue Behavior ◽  
Hot Work Die ◽  
A Current

scholarly journals Experimental Study for HIx Concentration by Electro-Electrodialysis (EED) Cells in the Water Splitting Sulfur-Iodine Thermochemical Cycle

2019 ◽  
Vol 3 (2) ◽  
pp. 50 ◽  
Author(s):  
Giampaolo Caputo ◽  
Irena Balog ◽  
Alberto Giaconia ◽  
Salvatore Sau ◽  
Alfonso Pozio
Keyword(s):  
Experimental Study ◽  
Hydrogen Production ◽  
Water Splitting ◽  
Transport Number ◽  
Hydriodic Acid ◽  
Thermochemical Cycle ◽  
Slow Increase ◽  
Electro Osmosis ◽  
A Current ◽  
Splitting Process

The efficiency of HI concentration/separation from a HIx solution, (mixture of HI/H2O/I2) represents a crucial factor in the sulfur-iodine thermochemical water splitting process for hydrogen production. In this paper, an experimental study on HI cathodic concentration in HIx solution using stacked electro-electrodialysis (EED) cells was carried out under the conditions of 1 atm and at three different temperature (25, 55 and 85 °C) and using a current density of 0.10 A/cm2. Results showed that an increase in HI concentration can be obtained under certain conditions. The apparent transport number (t+) in all the experiments was very close to 1, and the electro-osmosis coefficient (β) changed in a range of 1.08–1.16. The tests showed a detectable, though slow, increase in both the anodic iodine and cathodic hydriodic acid concentrations.

Radial Expansion of T5-6063 Aluminum Tubes: An Experimental Investigation and Numerical Simulation

2008 ◽  
Author(s):  
A. Al-Hajeri ◽  
A. C. Seibi
Keyword(s):  
Experimental Study ◽  
Finite Element ◽  
Stress Concentration ◽  
Failure Modes ◽  
Expansion Ratio ◽  
Radial Expansion ◽  
Drawing Force ◽  
Element Analysis ◽  
Aluminum Tubes ◽  
Zero Degree

This paper presents the design of an experimental set-up to mechanically expand T5-6063 aluminum tubes using conical hardened steel mandrels. The effect of the expansion ratio and mandrel angle on the tube wall thickness and drawing force required to expand the tubes as well as failure modes near embedded circular holes are investigated. The experimental study considered four radial expansion ratios of 1.5, 5, 7 and 10% and three mandrel angles of 10, 22.5, and 30 degrees. It was shown experimentally that most of the tubes failed at the 90 degrees position of the hole indicating that the maximum stress concentration takes place at that position as compared to the zero degree location. The experimental study was supplemented by finite element models reflecting the lab tests to determine the drawing force and study the stress concentration around the hole at zero and 90 degrees locations. The finite element analysis took into consideration various parameters such as expansion ratio and mandrel angle. The simulation results, which were calibrated through generated experimental data, confirmed the experimental observations when studying the stress concentration around the hole for various mandrel angles and expansion ratios at 90 degrees angle. The finite element results also showed that the stress concentration is much higher at 90 degrees position where failure occurred in all tested samples as compared to the zero degree angle.

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