On the fatigue-critical amplitude of random-amplitude stress

• Autorzy: Kolenda J.
• Języki publikacji: EN

Abstrakty

EN

Uniaxial non-zero mean stress of constant circular frequency in the high-cycle fatigue regime is considered. It is assumed that equation of the S-N curve and modified Soderberg equation are applicable. For constant-amplitude stress, the fatigue-critical stress amplitude is defined as that which leads to failure during the required design life. For random-amplitude stress, expected values of the fatigue-critical stress amplitude and total fatigue damage accumulated during the required design life are estimated. It is found that the probability of fatigue failure is equal to the probability of exceedance of the fatigue-critical stress amplitude. As an example, for stationary random stress the equivalent random-amplitude stress and probability of fatigue failure are determined.

Słowa kluczowe

EN

uniaxial load; random stress; high-cycle fatigue; failure probability

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2007
• Tom: nr 2
• Strony: 9--11
• Opis fizyczny: Bibliogr. 6 poz.

Twórcy

autor

Kolenda J.

• Gdańsk University of Technology Polish Naval University,

Bibliografia

• 1. Kocańda S., Szala J.: Fundamentals of fatigue calculations (in Polish). PWN (State Scientific Publishing House). Warszawa. 1997
• 2. Almar-Naess A. (Ed.): Fatigue handbook. Offshore steel structures. Tapir Publishers. Trondheim. 1985
• 3. Pacut A.: Probability theory. Probabilistic modeling in technology (in Polish). WNT (Scientific - Technical Publishing House). Warszawa. 1985
• 4. Preumont A.: Vibrations aléatoires et analyse spectrale. Lausanne: Presses Polytechniques et Universitaires Romandes, CH-1015. 1990
• 5. Cempel C.: Theory of energy transformation systems and their application in diagnostic of operating systems. Applied Math. and Computer Sciences, No 2/1993
• 6. Kolenda J.: On fatigue safety of metallic elements under static and dynamic loads. Gdańsk University of Technology Publishers. 2004