Premium
ESTIMATION OF THE FATIGUE LIMIT BY PROGRESSIVELY‐INCREASING LOAD TESTS
Author(s) -
DENGEL D.,
HARIG H.
Publication year - 1980
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.1460-2695.1980.tb01108.x
Subject(s) - limit (mathematics) , limit load , structural engineering , range (aeronautics) , basis (linear algebra) , fracture (geology) , fatigue limit , set (abstract data type) , mode (computer interface) , mathematics , materials science , statistics , engineering , computer science , mathematical analysis , composite material , finite element method , geometry , programming language , operating system
— On the basis of fatigue data derived from a large number of experiments, the load progression methods of Locati and Prot as well as a method operating on a thermometric basis have been comparatively evaluated in an experimental and analytical (statistical) study. The last‐named thermo‐method can provide useful estimates for a fatigue limit corresponding with ca. 0 to 5% probability of fracture with only 1 to 3 experiments. The Prot‐method, set up and evaluated in a certain way, provides a useful estimate of the fatigue limit and, additionally, an approximate indication of the width of the transition range of the corresponding Wöhler‐type tests after experiments on not less than about ten specimens. The load progression, contrary to the original Prot‐concept, must not necessarily be applied in a continuous mode, but can occur stepwise with increments Δσ smaller than ca. 15 Nm ‐2 .