Comparing guidelines concerning construction of the S-N curve within limited fatigue life range

• Autorzy: Strzelecki P. , Sempruch J. , Nowicki K.
• Języki publikacji: EN

Abstrakty

EN

The article collates guidelines concerning experimental construction of the S-N fatigue curves within a limited fatigue life range. An attempt is made to compare these guidelines, based on experimental data recorded during rotating bending of a notched specimen made of 42CrMo4. The recorded differences in fatigue life values between the constructed curves reach the maximum of 12.2%. According to the above guidelines, the number of tests in particular test series varies from 6 to 28. Based on the performed analysis a conclusion was made that the increase in the number of tests leads to the increase of accuracy but, on the other hand, remarkably increases the time of the experiment and, consequently, its cost. In this context, it is the research worker who, taking into account a possible future use of the fatigue curve, should individually decide about its accuracy.

Słowa kluczowe

EN

high-cycle fatigue; S-N curve; fatigue tests

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2015
• Tom: nr 3
• Strony: 67--74
• Opis fizyczny: Bibliogr. 21 poz., rys., tab.

Twórcy

autor

Strzelecki P.

• UTP University of Science and Technology, ul. Ks. Kordeckiego 20, 85-225 Bydgoszcz, Poland

autor

Sempruch J.

• UTP University of Science and Technology, ul. Ks. Kordeckiego 20, 85-225 Bydgoszcz, Poland

autor

Nowicki K.

• UTP University of Science and Technology, ul. Ks. Kordeckiego 20, 85-225 Bydgoszcz, Poland

Bibliografia

• 1. Kozak J., Gorski Z., Fatigue strength determination of ship structural joints, Polish Maritime Research 2(69) Vol 18, 2011.
• 2. PN-EN 1993-1-9, Eurokod 3: Designing steel structures. Part 1-9: Fatigue, 2007 (in Polish).
• 3. Kocak M., et al.,. FITNET Fitness-for-Service PROCEDURE – FINAL DRAFT MK7. tom I: FITNET FFS Procedure. European Fitness-for-Service Thematic Network – FITNET, 2006.
• 4. Hobbacher A.F., The new IIW guidelines for fatigue assessment of welded joints and components- A comprehensive code recently updated. International Journal of Fatigue, Vol. 31, Is. 1, January 2009.
• 5. Hobbacher A, et al. Guidelines for fatigue design of welded joints and components, IIW document IIW-1823-07ex XIII-2151r4-07/XV-1254r4-07;2008.
• 6. ASTM E 739-91, Standard Practice for Statistical Analysis of Linear or Linearized Stress-Life (S-N) and Strain-Life (S-N) Fatigue Data, 2004.
• 7. Data Sheet on Fatigue Properties of Rail Steel by Alternating Axial Loading Life Test. [online]. Meiji University Academic Frontier. [access: 07 August 2012]. World Wide Web: <http://www.isc.meiji.ac.jp/~shinrai/ H12/H12%20Alternating%20Axial%20(Rail%20Steel2).pdf>.
• 8. Tomaszewski T., Sempruch J., Analysis of size effect in highcycle fatigue for EN AW-6063, Solid State Phenomena, Vol. 224, 2015.
• 9. PN-EN 3987, Aviation and astronautics – Methods to test metal materials – High-cycle fatigue tests with constant amplitude of controlled load, 2010 (in Polish).
• 10. PN-H 04325, Fatigue tests of metals – Basic terms and general guidelines on preparation of specimens and testing procedure,1976 (in Polish).
• 11. ISO 12107, Metallic materials - fatigue testing – statistical planning and analysis of data, 2003.
• 12. Skibicki D., Sempruch J., Pejkowski L., Steel X2CrNiMo17-12-2 testing for uniaxial, proportional and non-proportional loads as delivered and in the annealed condition, Material Science Forum, Vol. 726, 2012.
• 13. Sempruch J., Strzelecki P., Error of fatigue life determined according to the Fitnet method, 17th International Conference on Engineering Mechanics, Svratka, Czech Republic, May 2011.
• 14. Strzelecki P., Sempruch J., Experimental verification of analytical method for determining the S-N curve for alloy steel, Key Engineering Materials, Vol. 598, 2014.
• 15. Strzelecki P., Analytical method to determine high-cycle fatigue properties of materials and construction elements (in Polish), Ph.D. thesis, 2014.
• 16. Kenan G., Mehmet D., Mustafa U., Effect of cathodic polarisation on corrosion fatigue behaviour of ion nitride AISI 4140 steel. International Journal of Fatigue, Vol. 24 Is. 5, May 2002.
• 17. Data Sheet on Fatigue Properties of SUJ2 Steel by Rotating Bending Test (HRC30),[online], Meiji University Academic Frontier, [access: 07 August 2012], World Wide Web: http://www.isc.meiji.ac.jp/~shinrai/H01/H01%20Rotating%20Bending%20%28SUJ-HRC30%29.pdf.
• 18. Strzelecki P., Sempruch J., Analysing slope coefficient of the Wohler curve within finite life range (in Polish). XXV Conference on Fatigue and Fracture Mechanics, Bydgoszcz-Fojutowo 2012.
• 19. Strzelecki P., Sempruch J., Hybrid method for determining fatigue characteristic in high cycle life. 20th International Conference Engineering Mechanics 2014, Svratka, Czech Republic, May 2014.
• 20. Strzelecki P., Sempruch J., Experimental verification of the analytical method for the estimated S-N curve for limited fatigue life. Materials Science Forum, Fatigue Failure and Fracture Mechanics, Vol. 726, August 2012.
• 21. Sonsino S.M., 2007. Course of SN-curves especially in the high-cycle fatigue regime with regard to component design and safety. International Journal of Fatigue. Vol. 29, Is.12, December 2007.