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ON LIFE TIME PREDICTIONS WITH THE STRAIN RANGE PARTITIONING METHOD
Author(s) -
HOFFELNER W.,
MELTON K. N.,
WÜTHRICH C.
Publication year - 1983
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.1460-2695.1983.tb01140.x
Subject(s) - formalism (music) , low cycle fatigue , materials science , structural engineering , alloy steel , range (aeronautics) , alloy , experimental data , thermodynamics , algorithm , mathematics , metallurgy , composite material , engineering , statistics , physics , visual arts , art , musical
— Computer optimization techniques were applied to the strain range partitioning method for lifetime prediction under high temperature low cycle fatigue loading. The experimental data were evaluated using a simultaneous parameter fit determination of the baseline coefficients. This approach gave good predictions whereas a more conventional method did not work. The significance of the linear damage rule and the interaction damage rule is discussed on the basis of a generalised rule containing both as special cases. This formalism was applied to a ferritic steel and a cast nickelbase‐super‐alloy. In both cases a very good agreement between calculated and measured lifetimes was found.