PSI - Issue 58

Radovan Minich et al. / Procedia Structural Integrity 58 (2024) 80–86 R. Minich et al./ Structural Integrity Procedia 00 (2019) 000–000

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Fig. 5. Quantitative evaluation of operational fatigue life.

If the situation is not severe (red or green), e.g. the S-N curve of the structural node is of good quality, but the load spectrum is aggressive, a detailed calculation of the fatigue life should be carried out, based on a carefully determined S-N curve and a sufficiently representative operating load spectrum, as presented Kepka and Kepka Jr. (2018). 3. Conclusions The paper presents a possible approach to the creation and use of a knowledge base to support the development of bodyworks of buses, trolleybuses and battery buses from the point of view of their sufficient service fatigue life. The knowledge base contains the results of fatigue tests of welded joints of bus bodies from a number of research and development projects implemented in cooperation with industrial enterprises. The database is further supplemented with results from service stress measurements of these structural nodes. During the development of a new vehicle, it is possible to qualitatively compare the fatigue strength of the structural nodes of the new bodywork as well as the aggressiveness of their loading. Acknowledgments The conference contribution was created with financial support from the Ministry of Education, Youth and Sports of the Czech Republic. References Basan, R., Marohnić, T., Božić, Ž., 2023. Application of material fatigue parameters estimation in analysis of rolling-sliding contact fatigue of gears. 5th International Conference on Structural Integrity and Durability. Procedia Structural Integrity 46, 62–67. Braut, S., Tevčić , M. , Butković, M., Božić, Ž., Žigulić , R., 2021. Application of modified Locati method in fatigue strength testing of a turbo compressor blade. Procedia Structural Integrity 31, 33–37. BS 7608:1993 - Fatigue design and assessment of steel structures.