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Fatigue Strength of Notched Specimen under Combined Stress

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Title: Fatigue Strength of Notched Specimen under Combined Stress
Authors: Matake, Tomokazu / Imai, Yasufumi
Issue Date: May-1980
Publisher: 社団法人日本機械学会
Citation: Bulletin of JSME. 1980, 23(179), p.623-629
Abstract: From the fatigue test of notched specimens of isotropic 70:30- brass, under bending, torsion, and combined stress state of them, a simple criterion for the slip-band crack initiation has been obtained. In spite of the complexity of the triaxial stress state below the notch root, only two stress components, the maximum shearing stress τ_<max> and the normal stress σ_n acting on a particular slip plane, are responsible for initiating slip-band cracks. Using the averaged stress values over the half-grain-size depth below the notch root, linear sum of them, τ_<max> + a・σ_n, acts just as the torsional stress in unnotched specimens. At the fatigue limit, therefore, the value for any combined stress state coincides with the torsional one. This relation is more general than the one which has been obtained before for unnotched specimens because of including the case for the unnotched as an extremely shallow notch.
URI: http://hdl.handle.net/10069/16747
ISSN: 00213764
Relational Links: http://ci.nii.ac.jp/naid/110002359236/
Rights: 社団法人日本機械学会 / 本文データは学協会の許諾に基づきCiNiiから複製したものである
Type: Journal Article
Text Version: publisher
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/16747

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