Failure Investigation of Plastic Shredding Machine’s Flange Coupling Based on Mechanical Analysis

Authors

  • Ignatius Pulung Nurprasetio Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Ganesha no. 10, Bandung 40132, Indonesia Author
  • Bentang Arief Budiman National Center for Sustainable Transportation Technology, Ganesha no. 10, Bandung 40132, Indonesia Author
  • Farid Triawan Department of Transdisciplinary Science and Engineering, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8552, Tokyo, Japan Author

DOI:

https://doi.org/10.17509/ijost.v2i2.7988

Keywords:

Failure analysis, Keyway, Fixed flange coupling, Finite element analysis, Hardness testing, Plastic shredding machine

Abstract

This paper presented the investigation of failure mechanism of plastic shredding machine’s flange coupling which is made of cast steel. The machine unexpectedly stalled a few minutes after High-Density Polyethylene (HDPE) plastic bottles were fed into the machine. It was discovered afterward that the flange broke with the large crack surface. Finite element analysis (FEA) was performed to find the position and value of the critical stresses in the flange during operating condition. Subsequently, hardness test was conducted on the flange body to determine the Brinell hardness which was then converted into the approximate ultimate tensile strength (σu). As a result, a maximum Von Mises stress of 287 MPa was confirmed from the FEA to be concentrated in the flange’s keyway. Although this was found to be lower than the approximate σu obtained from hardness testing i.e. 449 MPa, the critical stress indicated an unstable condition which may induce a crack initiation any time when vibration or dynamic load occurs. Based on these analyses, it was concluded that the failure had been initiated by dynamic rather than static loading generated during machine stall condition. The dynamic load caused crack initiation at a stress concentration point of the keyway. The crack then propagated rapidly, breaking the flange body.

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References

Alsalem, S. M. (2009). Recycling and recovery routes of plastic solid waste (PSW): A review. Waste Management, 29(10), 2625-2643. DOI: https://doi.org/10.1016/j.wasman.2009.06.004

Berndt, F., van Bennekom A. (2001). Pump shaft failures - a compendium of case studies. Engineering Failure Analysis, 8, 135-144 DOI: https://doi.org/10.1016/S1350-6307(99)00043-6

Batdorf, S. B. (1975). Fracture statistics of brittle materials with intergranular cracks. Nuclear Engineering and Design, 35(3), 349–360. DOI: https://doi.org/10.1016/0029-5493(75)90067-9

Budiman, B. A., Suharto, D., Djodikusumo, I., Aziz, M., Juangsa, F. B. (2016). Fail-safe design and analysis for the guide vane of a hydro turbine. Advances in Mechanical Engineering, 8(7), 1–8. DOI: https://doi.org/10.1177/1687814016658178

Bugli, N. and Green, G. (2005). Performance and Benefits of Zero Maintenance Air Induction Systems. SAE Technical Paper, doi:10.4271/2005-01-1139. DOI: https://doi.org/10.4271/2005-01-1139

Dahlberg, M. (1997). Micromechanical modelling of nodular cast iron, a composite material. International Journal of Cast Metals Research, 9(6), 319-330. DOI: https://doi.org/10.1080/13640461.1997.11819673

Gaško, M. and Rosenberg G. (2011). Correlation between hardness and tensile properties in ultra-high strength dual phase steels. Short communication Materials Engineering - Materiálové inžinierstvo, 18, 155-159.

Göksenli, A., Eryürek I. B. (2009). Failure analysis of an elevator drive shaft. Engineering Failure Analysis, 16, 1011–1019. DOI: https://doi.org/10.1016/j.engfailanal.2008.05.014

Han, H. S. (2014). Analysis of Fatigue Failure on the Keyway of the Reduction Gear Input Shaft Connecting a Diesel Engine Caused by Tortional Vibration. Engineering Failure Analysis, 44, 285-298. DOI: https://doi.org/10.1016/j.engfailanal.2014.05.012

Kurniawan, T., Fauzi, F. A. B., and Asmara, Y. P. (2016). High-temperature Oxidation of Fe-Cr Steels in Steam Condition – A Review. Indonesian Journal of Science & Technology, 1 (1), 107 – 114. DOI: https://doi.org/10.17509/ijost.v1i1.2217

Li, W., Xia, F., and Luo, B. (2016). Failure Analysis of a High-Speed Shaft Crack. J Fail. Anal. and Preven. DOI 10.1007/s11668-016-0172-4. DOI: https://doi.org/10.1007/s11668-016-0172-4

Orthwein, W. C. (1979). A New Key and Keyway Design. Transactions of the ASME, 101, 338 – 341. DOI: https://doi.org/10.1115/1.3454059

Pace, G., Pisharody, S., and Fisher, J. (2003). Plastic Waste Processing and Volume Reduction for Resource Recovery and Storage in Space. SAE Technical Paper 2003-01-2369, doi: 10.4271/2003-01-2369. DOI: https://doi.org/10.4271/2003-01-2369

Pavlina, E.J. and Van Tyne, C.J. (2008). Correlation of Yield Strength and Tensile Strength with Hardness for Steels. Journal of Materials Engineering and Performance, 17, 888–893. DOI: https://doi.org/10.1007/s11665-008-9225-5

Pedersen, N. L. (2010). Stress concentrations in keyways and optimization of keyway design. The journal of strain analysis for engineering design, 45, 593-604. DOI: https://doi.org/10.1243/03093247JSA632

Stephens, R. I. (2001). Metal Fatigue in Engineering (2nd ed.). John Wiley & Sons, Inc. ISBN 0-471-51059-9.

STN EN ISO 6506-1 (2014). Metallic materials. Brinell hardness test. Part 1: Test method.

Zambrano, O. A., Coronado, J.J., Rodrı´guez, S.A. (2014). Failure analysis of a bridge crane shaft. Case Studies in Engineering Failure Analysis, 2, 25–32. DOI: https://doi.org/10.1016/j.csefa.2013.12.002

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Published

2017-09-01

Issue

Vol. 2 No. 2 (2017): IJoST: September 2017

Section

Research Paper

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This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

How to Cite

Failure Investigation of Plastic Shredding Machine’s Flange Coupling Based on Mechanical Analysis. (2017). Indonesian Journal of Science and Technology, 2(2), "124-133 ". https://doi.org/10.17509/ijost.v2i2.7988