Fatigue life determination of vehicle parts requires fine definition of load spectra applied. Significant load spectra must be defined from experimental data. Then, using Gram-Charlier-Edgeworth mathematical developments, global shapes of loading distribution curves are obtained. In addition to considering the physical aspect of material fatigue behaviour, a local definition of extreme loading is introduced. Frequency analyses are linked to the distribution of amplitudes. 200 practical recordings are analysed. Equivalent load spectra are compared to S-N curves and correlations between real loading of vehicle parts in service and laboratory test loading are obtained.

Issue Section:
Research Papers
Topics:
Fatigue life, Spectra (Spectroscopy), Stress, Vehicles, Fatigue, Shapes
1.
Banks, J., and Carson, J. S., Discret-event system simulation, Prentice-Hall, INC., Englewood Cliffs, New Jersey, 1984.
2.
Berns, H. D., “Field Service History Analysis For Ground Vehicles,” Soc. of Auto. Eng. Inc., Earthmoving Industry Conf., Peori, Illinois, 1975, p. 10, SAE 750553.
3.
Gross, W. A., Jr., “Aberdeen Proving Ground Facilities for Testing Military Vehicles,” Soc. of Auto. Eng. Inc. Mid-year Meeting, SAE 700523, Detroit, Mich., May 1970, p. 25.
4.
Grubisic
V.
, “
De´termination of Load Spectra for Design and Testing
,”
Int. J. of Vehicle Design
, Vol.
15
, p.
8
–
26
,
1994
.
5.
Jackson, N. C., “Pavement Performance—A state DOT perspective,” Truck and Bus Meeting and Expo, Indianapolis, Indiana, Nov. 7–10 1988, pp. 5–15.
6.
Kendall, M., and Stuart, A., “The advanced theory of statistics,” Griffin, G.B. 1973.
7.
Kouta, R., “Me´thodes de Corre´lation par les Sollicitations des Pistes d’essais de Ve´hicles,” PhD. Lyon, No 94ISAL 0096, France, Nov. 1994.
8.
Kouta, R., Fauchon, J., and play, D., “Proce´dures de Corre´lation Entre Essais Acce´le´re´s et Conditions Re´elles d’exploitation, Concernant un Ve´hicule Industriel,” 9th international conference on Reliability and Maintanability, European Saftey and Reliability Conference, λμ 9, La Baule, France, June 1994.
9.
Leadbetter, M. R., Lindgen, G., and Rootzen, H., “Extremes and Related Properties of Random Sequences and processes,” Springer Series in Statistics, 1980.
10.
Lesse, E., and Mullin, L., “Role of Fatigue Analysis in the Vehicle test Simulation laboratory,” SAE Technical paper series, No. 91016, pp. 57–68, 1991.
11.
Preumont, A., “Vibrations Ale´toires et Anayse Spectrale,” Presses Polytechniques et Universitaires Romandes, Lausanne 1990, p. 343.
12.
Rice, J. R., Beer, F. P., and Paris, P. C., “On the prediction of Some Random Loading Characteristics Relevant to Fatigue,” Acoustical Fatigue In Aerospace Structures, Proc. of the Sec. Int. Conf. Dayton, Ohio, April 29–May 1, 1964, pp. 121–144.
13.
Sagrista, S. N., “On a Generalization of Pearson’s Curves to the Two-dimensional Case,” Trabajos de Estadistica, 1952, No. 3, pp. 273–314.
14.
Van Dijk, G. M., “Statistical Load Data Processing,” 6th Int. Conf. Aircraft Fatigue Symp., Miami, Florida, 1971, NASA SP–309, pp. 565–598.
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