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Fatigue Strength of Nodular Iron Crankshafts
Technical Paper
2001-01-3412
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Within motor and vehicle industry, there is a permanent trend to improve existing materials in respect of their properties and economic fabrication, or to replace the same by new materials that meet adequate requirements to a greater extent than the existing ones. One of such materials that is gaining wide usage is nodular iron which belongs to a group of available low cost materials. As a structural material it is highly competitive with other structural materials, steel in particular. Nowadays nodular iron is used for making vital machine and engine components such as, for example, crankshafts, camshafts, gears.
The paper offers results obtained in the process of testing high speed diesel engine nodular iron crankshaft fatigue strength. To get a complete assessment of fatigue strength experimental test results and their proper use, scatter of such test results has been considered separately. Actually the scatter of test results represents one of the greatest problems in experimental tests. By introducing and analyzing the destruction probability the authors got the sound basis for determination of engine crankshaft safety and reliability. Thus the dilemma of how to use results obtained by testing fatigue strength of notnitrided and nitrided nodular iron crankshafts is eliminated. The destruction probability both in the zone of limited durability and endurance limit has been analyzed by means of Weibull distribution.
Also the paper offers analysis of factors that affect nodular iron Nl.80 crankshaft endurance. It has been found out that the porosity, slag, flake graphite and carbides in structure represent the most influential factors affecting the nodular iron crankshaft endurance.
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Gligorijevic, R., Jevtic, J., Vidanovic, G., and Radojevic, N., "Fatigue Strength of Nodular Iron Crankshafts," SAE Technical Paper 2001-01-3412, 2001, https://doi.org/10.4271/2001-01-3412.Also In
References
- Mullinas, P. Lighter, Higher Performance Crankshafts, High Speed Diesel and Drives July-August 1990 7
- Sonnenschein, T. Trapp, H. Walter, H. Rist, A. MTZ 9 1969 MTZ 12 1971
- Mahnig, F. Walter, H. Zwyssing, J. VDI-Bericht 286 1976
- Mahnig, F. Walter, H. Zwyssing, J. Gussteile in der Fahrzengtechnik-Bewährung in Leichtbau; onderdruck ATZ 84 10 12 1982
- Kowalke, H. Niederquell, D. Becker, H. Hohe Belastbarkeit bei dynamischer Beanspruchung, Konstruieren und Giessen 4 1980
- Hück, M. Schütz, W. Bergman, J. 1983
- Krause, R. MTZ 38 1977
- Hück, M. Schütz, W. Walter, H. Modern Fatigue Data for Dimensioning Vehicle Components of Ductile and Malleable Cast iron Technical Publication of George Fischer Ltd Schaffhausen 1984
- Gligorijevic, R. Tosic, M. Terzic, I. Some Experience gained with Plasma and Gas nitrided 42CrMo4 Steel Crankshafts “Advance in Surface Treatments” 5 33 Pergamon Press Oxford 1987
- Tosic, M. Terzic, I. Gligorijevic, R. Ognjanovic, M. Fatigue Improvements of Glow-discharge-Plasma Nitrided Steel rotary specimens Surface and Coatings Technology 63 1994 73
- Gligorijevic, R. The Effect of Gas and Plasma Nitriding on Volume and Surface Fatigue Strenght of High Grade Nodular Iron Fac. Mech.Eng. Belgrade 1991