scholarly journals INFLUENCE OF LINEAR PROFILE MODIFICATIONS ON THE DYNAMIC LOADING OF A SPUR GEAR

2021 ◽  
Vol 26 (2) ◽  
pp. 707-722
Author(s):  
Oğuz DOĞAN ◽  
Onur KALAY ◽  
Fatih KARPAT
Keyword(s):  
Dynamic Loading ◽  
Spur Gear ◽  
Linear Profile

Dynamic Loading of Spur Gear Teeth

1959 ◽  
Vol 81 (1) ◽  
pp. 1-7 ◽  
Author(s):  
A. Y. Attia
Keyword(s):  
Dynamic Loading ◽  
Strain Gage ◽  
Spur Gear ◽  
Spur Gears ◽  
Dynamic Conditions ◽  
Gear Teeth

The paper presents results of strain gage investigations conducted on steel spur gears to measure the instantaneous load on the tooth under static and dynamic conditions.

On Dynamic Loads in Parallel Shaft Transmissions: Part II—Parameter Study

1988 ◽  
Vol 110 (2) ◽  
pp. 226-229 ◽  
Author(s):  
H.-H. Lin ◽  
R. L. Huston ◽  
J. J. Coy
Keyword(s):  
Natural Frequency ◽  
Dynamic Loading ◽  
Dynamic Load ◽  
Spur Gear ◽  
Transmission Model ◽  
Parameter Study ◽  
Factors Affecting ◽  
Rotating Speed ◽  
Tooth Stiffness ◽  
Speed Up

Solutions to the governing equations of a spur gear transmission model, developed in Part I, are presented. Factors affecting the dynamic load are identified. It is found that the dynamic load increases with operating speed up to a system natural frequency. At operating speeds beyond the natural frequency the dynamic load decreases dramatically. Also, it is found that the applied load and shaft inertia have little effect upon the dynamic load. Damping and friction decrease the dynamic load. Finally, tooth stiffness has a significant effect upon dynamic loading: the higher the stiffness, the lower the dynamic loading. Also, the higher the stiffness the higher the rotating speed required for peak dynamic response.

Reverse torque values of abutment screws after dynamic loading: The effects of sealant agents and the taper of conical connections

2020 ◽  
Author(s):  
Arda Ozdiler ◽  
suleyman dayan ◽  
Burc Gencel ◽  
Gulbahar Isık-Ozkol
Keyword(s):  
Dynamic Loading ◽  
Antibacterial Agent ◽  
In Vitro Study ◽  
Control Group ◽  
Silicone Sealant ◽  
Reverse Torque ◽  
The Stability ◽  
Torque Values ◽  
Chlorhexidine Gel

This in vitro study evaluated the influence of taper angles on the internal conical connections of implant systems and of the application of chlorhexidine gel as an antibacterial agent or a polyvinyl siloxane (PVS) sealant on the reverse torque values of abutment screws after dynamic loading. The current study tested four implant systems with different taper angles (5.4°, 12°, 45°, and 60°). Specimens were divided into three groups: control (neither chlorhexidine gel filled nor silicone sealed), 2% chlorhexidine gel-filled or silicone-sealed group, and group subjected to a dynamic load of 50 N at 1 Hz for 500,000 cycles prior to reverse torque measurements. Quantitative positive correlation was observed between the taper angle degree and the percentage of tightening torque loss. However, this correlation was significant only for the 60° connection groups except in the group in which a sealant was applied ( p = 0.013 for the control group, p = 0.007 for the chlorhexidine group). Percentages of decrease in the torque values of the specimens with silicone sealant application were significantly higher compared with both the control and chlorhexidine groups ( p = 0.001, p = 0.002, p = 0.001, and p = 0.002, respectively, according to the increasing taper angles); the percentage of decrease in torque values due to chlorhexidine application was statistically insignificant when compared with the control group. The application of gel-form chlorhexidine as an antibacterial agent does not significantly affect the stability of the implant–abutment connection under dynamic loads. PVS sealants may cause screw loosening under functional loads.

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