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Estimation of the endurance fatigue limit for structural steel in load increasing tests at low temperature
Author(s) -
KUCHARCZYK P.,
RIZOS A.,
MÜNSTERMANN S.,
BLECK W.
Publication year - 2012
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.2011.01656.x
Subject(s) - fatigue limit , materials science , amplitude , structural engineering , stress (linguistics) , work (physics) , composite material , limit load , cyclic stress , vibration fatigue , fatigue testing , metallurgy , finite element method , engineering , mechanical engineering , physics , linguistics , philosophy , quantum mechanics
The endurance fatigue strength of structural steel S355 was investigated in fatigue tests according to the method of increasing stress amplitude. The so‐called ‘load increasing test’ is based on the direct correlation between the fatigue limit and the temperature changes caused by local plastic deformation ahead of the tip of a micro crack, which was initiated as a result of cyclic loading. In the present work the fatigue limit for testing temperatures 40°C and −20°C was estimated not only from the temperature measurements but also from the electrical potential measurements. Further, the obtained results were validated in standard fatigue tests with constant stress amplitude and a very good agreement was found.