Shikur, Ali (2016) Effect of Stress Distribution on Surface Failure of Spur Gear. Masters thesis, Addis Ababa University.
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Abstract
One of the main gear damage mechanisms is the formation of pitting and spalling on the tooth flank. Several factors have significant influence on the damage formation, such as: contact stress level; tooth profile type; relative contact speed; surface finish and lubrication conditions. For this particular study the contact stress level (stress distribution) is the main factor which is considered for the surface failure. Surface failure is the critical failure mechanism that happens between two contacting solid bodies in sliding-rolling contacts. The stress distribution has a great effect on the surface failure of the spur gear teeth contact. In this thesis work the gear teeth contact simulation have done using two rollers contact having low and high speeds where the high speed roller is being tapered at the end in both sides.[12] The two rollers geometry have modelled using solid work premium and then imported to ANSYS Workbench 15 for analysis. The normal external load 5.7 KN ~ 29.6 KN is applied and the corresponding stress distribution have been evaluated. So that the maximum von misses stress distribution happened at the tapered end of the contact and the crack has been generated. As a result at tapered end of the roller a surface failure happened due to the maximum equivalent stress. The application area of the gear is for automobile power transmission systems.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Contact stress, spur gear, roller, rolling-sliding contact, stress distribution, Surface failure. |
| Subjects: | Q Science > Q Science (General) Q Science > QA Mathematics > QA75 Electronic computers. Computer science T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery T Technology > TL Motor vehicles. Aeronautics. Astronautics |
| Divisions: | Africana |
| Depositing User: | Andriamparany Edilbert RANOARIVONY |
| Date Deposited: | 27 Nov 2018 10:33 |
| Last Modified: | 27 Nov 2018 10:33 |
| URI: | http://thesisbank.jhia.ac.ke/id/eprint/7726 |
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