Fatigue life properties of circumferentially-notched bar of austenitic stainless steel with various concentration factors

Naoaki Nagaishi, Hisao Matsunaga, Michio Yoshikawa, Junichiro Yamabe, Saburo Okazaki, Saburo Matsuoka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Fatigue tests were performed using three types of round-bar specimens of Type 304, meta-stable, austenitic stainless steel. The specimens had circumferential notch with stress concentration factors, Kt, of 2, 3 or 6.6. Load controlled fatigue tests were conducted at stress ratio, R, of 0.1 and −1 in ambient air at room temperature. At R of 0.1, fatigue life was decreased with an increase in the stress concentration factor. Conversely, at R of −1, the stress concentration factor had little influence on the fatigue life. To understand the mechanism of the stress ratio effect, local deformation behavior at and beneath the notch root during the fatigue test was computed by means of finite element analysis considering that the plastic constitutive model describes the cyclic stress-strain response.

Original languageEnglish
Title of host publicationMaterials and Fabrication
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791851685
Publication statusPublished - Jan 1 2018
EventASME 2018 Pressure Vessels and Piping Conference, PVP 2018 - Prague, Czech Republic
Duration: Jul 15 2018Jul 20 2018

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume6B-2018
ISSN (Print)0277-027X

Other

OtherASME 2018 Pressure Vessels and Piping Conference, PVP 2018
CountryCzech Republic
CityPrague
Period7/15/187/20/18

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

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