Analysis of multiaxial low cycle fatigue of notched specimens for type 316L Stainless Steel under non-proportional loading

Pasquale Gallo; Stefano Bressan; Takahiro Morishita; Takamoto Itoh; Filippo Berto

doi:10.1016/j.tafmec.2017.01.009

Analysis of multiaxial low cycle fatigue of notched specimens for type 316L Stainless Steel under non-proportional loading

Pasquale Gallo, Stefano Bressan, Takahiro Morishita, Takamoto Itoh, Filippo Berto

Department of Mechanical Engineering

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Abstract

The paper analyzes multiaxial low cycle fatigue tests of notched specimens under proportional and non-proportional loading conditions. Strain controlled multiaxial low cycle fatigue tests were carried out using circumferentially notched round-bar specimens of type 316L stainless steel, with different stress concentration factors. The experimental results show that the crack initiation site is shifted from the notch tip. Based on this finding, a new model for life evaluation is proposed by taking into account the strain gradient in the proximity of the notch tip and the effective maximum strain range. The new model allows evaluating the fatigue life in a narrow scatter band.

Original language	English
Pages (from-to)	79-89
Number of pages	11
Journal	Theoretical and Applied Fracture Mechanics
Volume	89
Early online date	2017
DOIs	https://doi.org/10.1016/j.tafmec.2017.01.009
Publication status	Published - 2017
MoE publication type	A1 Journal article-refereed

Keywords

316L stainless steel
Multiaxial fatigue
Non-proportional loading
Notch

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10.1016/j.tafmec.2017.01.009

05_Manuscript_acceptedAccepted author manuscript, 15.8 MBLicence: CC BY-NC-ND

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title = "Analysis of multiaxial low cycle fatigue of notched specimens for type 316L Stainless Steel under non-proportional loading",

abstract = "The paper analyzes multiaxial low cycle fatigue tests of notched specimens under proportional and non-proportional loading conditions. Strain controlled multiaxial low cycle fatigue tests were carried out using circumferentially notched round-bar specimens of type 316L stainless steel, with different stress concentration factors. The experimental results show that the crack initiation site is shifted from the notch tip. Based on this finding, a new model for life evaluation is proposed by taking into account the strain gradient in the proximity of the notch tip and the effective maximum strain range. The new model allows evaluating the fatigue life in a narrow scatter band.",

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doi = "10.1016/j.tafmec.2017.01.009",

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T1 - Analysis of multiaxial low cycle fatigue of notched specimens for type 316L Stainless Steel under non-proportional loading

AU - Gallo, Pasquale

AU - Bressan, Stefano

AU - Morishita, Takahiro

AU - Itoh, Takamoto

AU - Berto, Filippo

PY - 2017

Y1 - 2017

N2 - The paper analyzes multiaxial low cycle fatigue tests of notched specimens under proportional and non-proportional loading conditions. Strain controlled multiaxial low cycle fatigue tests were carried out using circumferentially notched round-bar specimens of type 316L stainless steel, with different stress concentration factors. The experimental results show that the crack initiation site is shifted from the notch tip. Based on this finding, a new model for life evaluation is proposed by taking into account the strain gradient in the proximity of the notch tip and the effective maximum strain range. The new model allows evaluating the fatigue life in a narrow scatter band.

AB - The paper analyzes multiaxial low cycle fatigue tests of notched specimens under proportional and non-proportional loading conditions. Strain controlled multiaxial low cycle fatigue tests were carried out using circumferentially notched round-bar specimens of type 316L stainless steel, with different stress concentration factors. The experimental results show that the crack initiation site is shifted from the notch tip. Based on this finding, a new model for life evaluation is proposed by taking into account the strain gradient in the proximity of the notch tip and the effective maximum strain range. The new model allows evaluating the fatigue life in a narrow scatter band.

KW - 316L stainless steel

KW - Multiaxial fatigue

KW - Non-proportional loading

KW - Notch

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EP - 89

JO - Theoretical and Applied Fracture Mechanics

JF - Theoretical and Applied Fracture Mechanics

SN - 0167-8442

ER -

Analysis of multiaxial low cycle fatigue of notched specimens for type 316L Stainless Steel under non-proportional loading

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