Regression of fatigue curves using functions with graphs close to broken line

• Autorzy: Kohout J. , Věchet S.
• Konferencja: Metody oceny struktury oraz własności materiałów i wyrobów/Międzynarodowe Sympozjum (XIV ; 09-11.12.1999 ; Głuchołazy ; Polska)
• Języki publikacji: EN

Abstrakty

EN

Two new regression functions for the regression of fatigue curves were presented in paper [1] - the former for high cycle range, the latter for the whole cycle range starting with tensile strength and finishing high cycle range. The former has two asymptotes in log-log fit - with negative slope in the range of low cycle fatigue and with zero slope in high cycle range. The curve corresponding to the former function goes very close to both asymptotes, only in the range of their intersection it deflects considerably. Thus this curve is very similar to classical fit of fatigue results - broken straight line. Deeper study of Bastenaire function [2] has shown that it presents the same behaviour in log-lin fit. In usual range of high cycle fatigue, i.e. between 10 4 and 10 8 cycles the graphs of both these functions differ less than by usual thickness of line.

Słowa kluczowe

EN

material fatigue; fatigue curve

PL

zmęczenie materiału; krzywa zmęczenia

• Wydawca: Oficyna Wydawnicza Politechniki Opolskiej
• Czasopismo: Zeszyty Naukowe. Mechanika / Politechnika Opolska
• Rocznik: 1999
• Tom: z. 59
• Strony: 99--102
• Opis fizyczny: wykr.

Twórcy

autor

Kohout J.

• Military Academy in Brno

autor

Věchet S.