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Online since: April 2016
Authors: Tadeusz Łagoda, Andrzej Kurek, Anna Kulesa, Krzysztof Kluger, Henryk Achtelik
What is more, author’s proposal (8) is shaped like a letter ‘S’ which is sometimes advised for stress-life models (Kurek et al., 2015).
[15] Nieslony A., Kurek A., EL Dsoki Ch., Kaufmann H. (2012), A Study of Compatibility Between two ical Fatigue Curve Models based on Some Selected Structural Materials, International Journal of Fatigue, Vol. 39, 88-94
[15] Nieslony A., Kurek A., EL Dsoki Ch., Kaufmann H. (2012), A Study of Compatibility Between two ical Fatigue Curve Models based on Some Selected Structural Materials, International Journal of Fatigue, Vol. 39, 88-94
Online since: December 2007
Authors: Ying Xue Yao, W.Z. Xie, Y. Lu
It is seen that preload affects natural frequency obviously, and the critical
rotation speed will go up if gaining preload.
0
1000
2000
3000
4000
5000
6000 50 150 250 350
Axi al pr el oad( N)
Na t u r a l
Fr equency( Hz)
First order
Second order
Third order
Fourth order
Fig. 6 Variation of low order natural frequency along with the variation of preload
Table2 Variation of low order natural frequency along with the variation of preload (50~400N)
order first-order(Hz) second-order(Hz) third-order(Hz) fourth-order(Hz)
variation range
of frequency
707~863 1492~1836 4103~4528 5404~5748
Conclusions
In this paper, the FEM model of motorized spindle is set up to research on its dynamic characteristics,
which is effected by the axial preload on the natural frequency, the motorized spindle's natural
frequencies and corresponding vibration shapes, centrifugal forces and gyroscopic moments on the
motorized spindle shaft.
Online since: September 2016
Authors: Nataliya Shaburova, T.D. Ratmanov, D.D. Larionov
Time of the first defects fixation on the metal coating by the effect of HF [2]
The coating material
The substrate material
Si
SiO2
Al
Cr
Cu
Mo
Ni
Photoresist
Pt
Si3N4
Ag
Ta
Ti
W
n/a
n/a
10 min
n/a
4 min
5 min
4 min
n/a
3 min
n/a
n/a
n/a
n/a
n/a
8 min
n/a
4 min
5 min
4 min
n/a
2 min
n/a
n/a
n/a
According to the submitted data, tantalum, molybdenum and tungsten have the best processing characteristics.
[17] Abd El-Hady B.
[17] Abd El-Hady B.