OPERABILITY OF "SHAFT-CUP" COUPLINGS AND THEIR RELIABILITY ENHANCEMENT

2018 ◽  
pp. 50-54
Author(s):  
OLEG M. MELNIKOV ◽  
Keyword(s):  
Reliability Enhancement

Low-pressure turbine disc fi rtree slots’ life and reliability enhancement by ultrasonic surface hardening

2020 ◽  
pp. 491-495
Author(s):  
A.M. Tomashevich ◽  
G.G. Shirvan’yants ◽  
D.A. Teryaev
Keyword(s):  
Residual Stress ◽  
Low Pressure ◽  
Fatigue Tests ◽  
Compression Stress ◽  
Cycle Basis ◽  
Low Pressure Turbine ◽  
Working Stress ◽  
Turbine Disc ◽  
Axial Residual Stress ◽  
Reliability Enhancement

The possibility of life and reliability enhancing of AL-31F low pressure turbine disc’s fir-tree slots by ultrasonic hardening is considered. Having disc’s material properties studied, working stress derivation is executed which was further used for following comparative fatigue tests. Also, Davidenkov method residual stress analysis is carried out which showed 95.3 % change to compression stress for circumferential residual stress and 80.9 % change to compression stress for axial residual stress which proves possibility of fir-tree slots’ life and reliability enhancement by ultrasonic hardening. Comparative fatigue tests with N = 4•10 5 cycles basis showed that the hardened samples standing out the cycle basis during higher oscillatory amplitudes (and, thus, affecting loads) than the non-hardened basic ones.

Reliability enhancement of electronic packages by design of optimal parameters

2004 ◽  
Vol 44 (7) ◽  
pp. 1157-1163 ◽  
Author(s):  
Ashish Batra ◽  
Pradeep Ramachandran ◽  
Poornima Sathyanarayanan ◽  
Susan Lu ◽  
Hari Srihari
Keyword(s):  
Electronic Packages ◽  
Optimal Parameters ◽  
Reliability Enhancement

scholarly journals Shock reliability enhancement for MEMS vibration energy harvesters with nonlinear air damping as a soft stopper

2017 ◽  
Vol 27 (10) ◽  
pp. 104003 ◽  
Author(s):  
Shao-Tuan Chen ◽  
Sijun Du ◽  
Emmanuelle Arroyo ◽  
Yu Jia ◽  
Ashwin Seshia
Keyword(s):  
Vibration Energy ◽  
Energy Harvesters ◽  
Air Damping ◽  
Reliability Enhancement
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