| Course objectives: |
| The course provided basic information on how to handle elements subjected to fluctuating load and presents the physical basis of fatigue, load analysis. |
| Course content and structure: |
| Definition of damage and failure. Classification of failure modes. Definition of typical failure modes. Classification and characteristics of stresses. Types and characteristics of sinusoidal stresses. The components of stresses. Woehler's experiments. The S-N diagram. Endurance limit. Finite-life region. Infinite-life region. The Smith diagram. The Haigh diagram. Low-cycle fatigue. High-cycle fatigue. Endurance limit modifying factors. Combined fatigue stress concentration factor. Factor of safety. Uniaxial stresses. Stresses due to combined load. Equations of the S-N curves. Cumulative fatigue damage. Fatigue strength of shafts. Rotating shafts loaded by bending and torsional moments. The Soderberg approach. Load capacity of spur gears. Surface durability. Strength. |
| Evaluation method: |
| Examinations contain written test and oral questioning. Failed written test is not allowed. The mark of examination is calculated as the mean of the ratings of written test and the oral questioning. The minimum level of the mark of the exam is 40%. |
| Required reading: |
| Gillemot,L.: Anyagszerkezettan és anyagvizsgála. Tankönyvkiadó, Budapest, 1976.Miner,A.M.: Cumulative Damage in Fatigue. Journal of Appl. Mech. Trans. ASME, 1945.Matolcsy,M.: Szerkezetek dinamikája. Tankönyvkiadó, Budapest, 1974. |
| Suggested reading: |
| Niemann, W. - Winter, H.: Maschinenelemente II. Springer, Berlin-Heidelberg-New York-Tokio, 1983.Weibull, W.: Fatique Testing and the Analysis of Results Pergamon Press, New York, 1961.Zsáry, Á.: Méretezés kifáradásra a gépészetben Műszaki Könyvkiadó, Budapest, 1965.Szerenszen, Sz.V. - Kogaev,V.P. - Sneiderovics, R.M.: Neszuscsaja szposzobnoszt'i raszcsetü detalej masin na procsnoszt' Masinosztrojenie, Moszkva, 1975. |
