Geralization of goodman's diagram on the high-cycle fatigue range

• Autorzy: Ligaj B.
• Języki publikacji: EN

Abstrakty

EN

The calculations of fatigue life of the structural components in random load conditions are connected with many problems. One of them is taking into consideration the impact of the cycles of variable value of R coefficient, which is included in service load composition, on estimated value. This involves application of calculations of two-parametric fatigue characteristics in system Sm-Sa in time. There are many models of two-parametric characteristics. One of them is characteristics being a development of the Goodman’s conception, the biggest value of which is undoubtedly a simple description requiring the knowledge of following properties: Rm, R-1 and mo. In order to evaluate the characteristics mentioned above, it was compared to two-parametric fatigue characteristics determined in experimental way. The results of the analysis have been presented in form of diagram, which reveals the differences between characteristics depending on the number of cycles and the cycle asymmetry coefficient.

Słowa kluczowe

EN

fatigue life; two-parametric characteristics; S355J0 steel

• Wydawca: Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology
• Czasopismo: Journal of Polish CIMAC
• Rocznik: 2010
• Tom: Vol. 5, no 3
• Strony: 71--78
• Opis fizyczny: Bibliogr. 5 poz., rys., tab.

Twórcy

autor

Ligaj B.

• University of Technology and Life Sciences in Bydgoszcz ul. Prof. S. Kaliskiego 7, 85-789 Bydgoszcz, Poland tel.: [phone], fax: [phone],

Bibliografia

• [1] Kocańda, S., Szala, J., Fundamentals of fatigue calculations, (in Polish), PWN, Warszawa, 1997.
• [2] Lipski, A., Szala, J., Description of properties of fatigue materials with reference to changeability of cycle assymetry coefficient at sinusoidal load , Materiały XX Sympozjum Zmęczenia i Mechaniki Pękania, Bydgoszcz – Pieczyska, 2004.
• [3] Lipski, A., Szala, J., Experimental examination of two – parametric fatigue characteristics, Materiały XX Sympozjum Zmęczenia i Mechaniki Pękania, Bydgoszcz – Pieczyska, 2004.
• [4] Szala, G., Empirical examination of the impact of the cycle asymmetry coefficient of the load on the fatigue life of S355J0 steel, Journal of POLISH CIMAC, Gdańsk 2010.
• [5] Szala, J., Szala, G., Two – parametric fatigue characteristics - formulating problem, (in Polish), Problemy Eksploatacji – Zeszyty Naukowe 3/2001 (42), Wydawnictwo Instytutu Technologii Eksploatacji (Publishing House of Operation Technology Institute), pp. 287-296, Radom 2001.