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Forensic Investigation of a Failed Intermediate Starwheel Spur Gear Tooth in a Filler Machine

Salawu, Enesi Y. and Ajayi, O. O. and Inegbenebor, A.O. (2019) Forensic Investigation of a Failed Intermediate Starwheel Spur Gear Tooth in a Filler Machine. In: 2nd International Conference on Sustainable Materials Processing and Manufacturing, 2019.

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determine the root cause of failure and how to prevent subsequent failures. Thus, the study focused on the analysis of a failed intermediate star wheel spur gear tooth using metallographic observations. Three (3) different failed gear teeth were selected and prepared as metallographic samples. Each of the samples were observed under the optical microscope at different magnifications, ranging from 10, 40 and 100 μm. Further to this, the samples were subjected to visual observation. The result obtained from the microstructures were further analysed using 3D surface analyser. The result of visual observations revealed the presence of wear debris around the failed teeth, while the optical micrographs depicted the occurrence of pitting corrosion, Also, observed were regions that show zones of high stress raisers. The results from the 3D surface analyser further demonstrates the occurrence of variation in wear distribution with some zones under higher intensity of material erosion. This may be due to the presence of backlash during the meshing of the gears. The pattern of the results is therefore suggestive of the fact that the gear material was not properly matched with the operation environment. The study also looked at the economic effect of the downtime which the gear failure poses on the productivity of the filler machine.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Fatigue Failure, Fracture Mechanics, Reliability, Spur Gear, Production
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Mrs Patricia Nwokealisi
Date Deposited: 28 May 2020 11:44
Last Modified: 28 May 2020 11:44

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