Article : [SHEET311]

Info : COMPENDEX Answer Number 316, le 28/04/2000.

Titre : CORRELATION BETWEEN STRAIN SINGULARITY AT CRACK TIP UNDER OVER-ALL PLASTIC DEFORMATION AND THE EXPONENT OF MANSON-COFFIN LAW.

Cité dans : [DATA062] Recherche sur les auteurs COFFIN et MANSON, octobre 2001.

Source : Nippon Kikai Gakkai Ronbunshu A Hen v 51 n 463 Mar 1985 p 883-890
CODEN : NKGADA
ISSN : 0387-5008
Année : 1985
Document_Type : Journal
Treatment_Code : Application; Theoretical
Language : Japanese
Stockage :

Abstract :
The singularity of strain field at crack tip is analyzed by finite
element method.The singularity deviates from HRR singularity to
gamma minus (0.5approx.0.7) ( gamma : distance from crack tip) with
increasing plastic deformation.The reasons why low-cycle fatigue law
is expressed by DELTA epsilon PNf alpha equals C as pointed out by
Coffin and Manson and why the exponent alpha ranges from 0.5 to 0.7
for various materials are explained by considering that fatigue life
is mostly occupied by the crack propagation process and that the
singularity of strain field at crack tip under overall plastic
deformation is gamma minus (0.5approx.0.7) regardless of
materials.The material properties which influence the value of C in
DELTA epsilon pNf alpha equals C are also discussed.(Author
abstract) 16 refs.In Japanese.

Accession_Number : 1986(11):173201

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