Finite Element Analyses of Non-Standard Spur Gears
Authors
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Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumkuru – 572103, Karnataka ,IN
P. Srinivasa -
Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumkuru – 572103, Karnataka ,INC. Shashishekar
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Department of Mechanical Engineering, Sri Jayachamarajendra College of Engineering, JSS S&T University, Mysuru – 570006, Karnataka ,ING. Mallesh
DOI:
https://doi.org/10.18311/jmmf/2023/44017Keywords:
ANSYS Software, Bending Stress, Finite Element Analysis, Non-Standard Gears, Profile Generation.Abstract
Gears are the mechanical components and are predominate as the most effective means of power transmission in mining equipment which encompasses a wide range of machinery used in the extraction of minerals and resources from the earth. Currently, gears in c equipment are prone to a different types of failures when they are subjected to impact, shock and fatigue loads. It is noticed from the literature that 34.4% of the failures are due to poor lubrication, 19.6% due to impurity, 17.7% due to fixing errors, 6.9% are due to excess load and 2.8% failures are due to handling errors. Further, more than 1,500 gear failures were examined throughout the investigation, and it was observed that tooth bending fatigue is the common mode, leading to tooth fracture at the root owing to bending stress. Bending stress developed at the tooth root can be minimized by modifying addendum of mating gears or the involute geometry. An additional alteration that is rarely used is to make the gear asymmetric or nonstandard. Therefore, in this research work attempts are made to generate non-standard spur gear tooth profile by varying pressure angle and profile shift using Matlab to estimate bending stress using FE software ANSYS. Bending stress calculated using the Lewis equation and FE analysis were compared to validate the FE procedure. It is noticed that bending stress was reduced to 42.14% by increasing the pressure angle from 200 to 400 without altering other gear parameters. Hence, the possibility of tooth break can be minimized with the use of non-standard spur gears.
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References
Umezawa K. Recent trends in gearing technology. JSME International Journal. Ser. 3, Vibration, Control Engineering, Engineering for Industry. 1988; 31(2):357-62. https://doi.org/10.1299/jsmec1988.31.357
Osakue EE. Simplified spur gear design. ASME Int Mech Eng Congress Expo. 2016; 50657. https://doi.org/10.1115/ IMECE2016-65426
Becker WT, Shipley RJ. Failure analysis and prevention. ASM Handbook Archive; 2002. https://doi.org/10.31399/ asm.hb.v11.9781627081801
Colbourne JR. The geometry of involute gears. Springer Science & Business Media; 2012.
Richard GB. Shigley’s mechanical engineering design. McGraw-Hill Education; 2019.
Kapelevich A. Geometry and design of involute spur gears with asymmetric teeth. Mech Mach Theory.2000; 35(1):117-30. https://doi.org/10.1016/S0094- 114X(99)00002-6
Deng X, Hua L, Han X. Research on the design and modification of asymmetric spur gear. Math Probl Eng. 2015. https://doi.org/10.1155/2015/897257
Cavdar K, Karpat F, Babalik F C. Computer aided analysis of bending strength of involute spur gears with asymmetric profile. J Mech Des. 2005; 127(3):477-84. https://doi. org/10.1115/1.1866158
Mallesh G, Math VB, Ashwij PS, Shanbhag R. Effect of tooth profile modification in asymmetric spur gear tooth bending stress by finite element analysis. In 14th National Conference on Machines and Mechanisms (NaCoMM09), NIT, Durgapur, India; 2009. p. 17-18.
Litvin FL, Fuentes A. Gear geometry and applied theory. Cambridge University Press; 2004. https://doi.org/10.1017/ CBO9780511547126 PMCid:PMC3644947
Litvin FL. Development of gear technology and theory of gearing. National Aeronautics and Space Administration, Lewis Research Center; 1997.
Singh V, Senthilvelan S. Computer aided design of asymmetric gear. 13th National Conference on Mechanisms and Machines (NaCoMM07), IISc, Bangalore, India; 2007.
Celik M. Comparison of three teeth and whole body models in spur gear analysis. Mech Mach Theory. 1999; 34(8):1227- 35. https://doi.org/10.1016/S0094-114X(98)00058-5
Reddy JN. An introduction to nonlinear finite element analysis second edition: With applications to heat transfer, fluid mechanics, and solid mechanics. Oxford ScholarshipOnline; 2014. https://doi.org/10.1093/acprof:oso/9780199641758.001.0001
Mallesh G, Math VB, Ashwij PSDR, Shanbhag R. Effect of tooth profile modification in asymmetric spur gear tooth bending stress by finite element analysis. In 14th National Conference on Machines and Mechanisms (NaCoMM09), NIT, Durgapur, India. 2009, December. pp. 17-18.
