Effect of Stress Distribution on Surface Failure of Spur Gear
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Date
2016
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Addis Ababa University
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.
Keywords- Contact stress, spur gear, roller, rolling-sliding contact, stress distribution,
Surface failure.
Description
Keywords
Contact stress;spur gear; roller; rolling-sliding contact; stress distribution; Surface failure