Implementation of Fatigue Strength Analysis of Washing Machine Drum Using Von Mises Approach
Keywords:
washing machine drum, fatigue, stress, strain, analysis, simulation, von mises approachAbstract
The fatigue strength analysis of washing machine drum was analyzed using von mises approach. The expected life time of the washing machine drum with respect to fatigue strain at the welded parts was successfully estimated using Miner’s rule. From the results obtained it was observed that increasing the speed of the washing machine from 400 to 2200 rpm resultedto decrease in its life time from 120 to 20 months and this were attributed to increase in stress – strain concentration and then fatigue failure of the welded parts. Autodesk simulation of the washing drum activities at speeds and temperatures ranging from 400 to 2200 rpm and 30℃ to 120℃ respectively increased the von mises stress of the machine from 62 to 549Mpa. The simulation shows that increase in speed and temperature of the machine drum, decreased the fatigue limits of the welded thin sheets. Node shell element result of the strains at front, rear, and middle of the welded parts of the drum produced varying results at speeds in the range of 400 to 2200 rpm. Higher strains values ranging from 11 to 278 Mpa. Were obtained in the middle of the drum were stress concentration was more, which could be as a result of location of greater washing activity than in the front and rear side of the cylinder with less strain values (-1104 to -58Mpa), increase in speed (400- 2200 rpm) and the loads (10 to 100kg) in the washing machine drum were observed to increase the strain effects at the rear, front and middle of the cylinder.
References
1.Ashby M. F and David R. J (2002), Engineering material, Oxford Pergamum press, p119.
2.Ashby M. F. (2005), Material selection in mechanical dynamics, Slesevier ltd, USA, pp250-251.
3.ASTM: (1987), Standard definitions of terms relating fatigue. American society for testing and materials. pp. 1-10.
4.Ayoub G, NaitAbdulaziz M, Zairi F. and Gloaquen J.M. (2010), fatigue life prediction of rubber like materials using the continuum damage mechanics approach Procedia Engineering, 14:pp.201-207.
5.Bedkowski W. (2004), Assessment of the fatigue life of machine components under service loading – A review of selected problems, Journal of theoretical and applied mechanics, 52(3): 343 -359.
6.Bedkowski W., Logoda T. and Slocoik J. (2007), Strain controlled tests for determining the change of the Material Science, 43 (4):492 -498.
7. Choudhary M. (2009), fatigue strength analysis and end -of- life crack propagation, 13: pp .22-24.
8.DeArmond F. (1950), the laundry industry. Oxford University press, pp.9-11.
9.Deniz T. A, David R. and Williams W. S. (2014), Clothes Washing Simulation, Oxford University Press, pp.3-7.
10.Dong P, Hong J.K and Cao Z. (2003) Stresses and stress intensities and notches: anomalous crack growth revisited, International journal of fatigue 25: 811 – 825.
11.Fan Y.N, Shi H.J and Tokuda K. (2015), A generalized hysteresis energy method for fatigue and creep- fatigue prediction, International journal of fatigue 28:pp:204-209.
12.George P. (1999), Overview of material selection process: A simple handbook on material selection requirement, John wiley and sons, New York, pp21-23.
13.Giedion S (1998). Mechanization takes command. John Wiley and Sons New York, pp: 43-44.
14.Grammenoudis P, Reckwerth D. and Tsakmakis C. (2009) continuum damage models based on energy equivalence, pp .43-45
15.Hoepper D. W. and krupp(1974), W.E prediction of component life by application of fatigue crack growth knowledge, Engg fracture mech. 6: pp. 47-70.
16.Hzori B., Merghetti C. and Sosmel L. (2002), Estimation of the fatigue strength of light alloy welds by an equivalent notch – stress analysis, International journal of fatigue, 24:591- 599.
17.Jadoun A, Shivpuje S. and Ladkats. S (2014), Design of washing machine for cleaning of small components. 10: pp. 16-17.
18.Klind A. E. (2010), structural analysis of a washing machine cylinder, pp. 11-13.
19. Kolhar D, Pritesh L. and Tandale P. (2013), Optimization of a drum type washing machine by Analytical and computational Assessment.
20.Kreyer M. A (2014), life cycle analysis of distributed recycling of comsumer high density polyethylene Journal of cleaner production, 70:90-98
21. Lartey S. (2011), Modeling, Design and control of a portable washing machine during the spinning cycle.4: pp. 34-35.
22.Letcher T, Shen M.H.H, Scott E, George T. and CrossC. (2012), An energy – based critical fatigue life prediction method, Material Science 51(6):119-123.
23.Mabotuwana (2005), Design of basic model of semi – automatic dish washing machine. 2: pp, 4-5.
24.Main T. and NicolettoG. (2007), Fatigue design of welded joints using the finite element method, Journal of theoretical and applied mechanics 22(2): 443-458.
25.Makkonen M. (2009), predicting the total fatigue life in metal, Oxford Pergamum press, pp.80-84.
26.Murakami Y. and Miller K. J (2007), what is fatigue damage? A view point from the observation of low cycle fatigue, International journal of fatigue, 27: pp. 991 - 1005.
27.Pook L.P, Front N.E and Matsh K. (2004), Metal fatigue. Oxford university press. pp. 61-63.
28.Pradhan A, chandrakar S. K and Agraval M. (2014) Fatigue design of complex welded structures using finite element analysis in hot spot approach and notch stress intensity factor approach, Journal of Basic and applied Engineering research, 1(5): 78- 84.
29.Pulos Arthur J. (2000) American Design Ethic: A history of industrial design.3: pp. 7-8.