Accuracy of Multiaxial Fatigue Testing with Thin-Walled Tubular Specimens

Uniaxial, torsion, and axial-torsion fatigue experiments were conducted on a pressure vessel steel, 16MnR, at room temperature. The uniaxial experiments were conducted using solid cylindrical specimens. Axial-torsion experiments employed thin-walled tubular specimens subjected to proportional and nonproportional loading. A critical plane multiaxial fatigue criterion recently developed was found to correlate well with all the experiments conducted for the material. In addition, the fatigue criterion correctly predicted the cracking behavior of the material subjected to different loading paths.

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A novel high-frequency fatigue testing methodology for small thin-walled structures in the HCF/VHCF regime

International Journal of Fatigue ◽

10.1016/j.ijfatigue.2021.106146 ◽

2021 ◽

Vol 146 ◽

pp. 106146

Author(s):

Florian Himmelbauer ◽

Michael Tillmanns ◽

Gerhard Winter ◽

Florian Gruen ◽

Constantin Kiesling

Keyword(s):

High Frequency ◽

Fatigue Testing ◽

Testing Methodology ◽

Thin Walled Structures ◽

Thin Walled

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An Experimental Evaluation for Four Multiaxial Fatigue Approaches

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.627.425 ◽

2014 ◽

Vol 627 ◽

pp. 425-428

Author(s):

Dan Jin ◽

Da Jiang Tian ◽

Qi Zhou Wu ◽

Wei Lin

Keyword(s):

Low Cycle Fatigue ◽

Multiaxial Fatigue ◽

304 Stainless Steel ◽

Normal Strain ◽

Cycle Fatigue ◽

Critical Plane ◽

Maximum Shear Strain ◽

Rainflow Cycle Counting ◽

Tubular Specimens ◽

Damage Rule

A series of tests for low cycle fatigue were conducted on the tubular specimens for 304 stainless steel under variable amplitude and irregular axial-torsional loading. Rainflow cycle counting and linear damage rule are used to calculate fatigue damage and four approaches, e.g. SWT(Smith-Watson-Topper), KBM(Kandil-Brown-Miller), FS(Fatemi-Socie), and LKN(Lee-Kim-Nam) approach are employed to predict the fatigue life. The maximum shear strain plane, the maximum normal strain plane, and the maximum damage plane are considered as the critical plane, respectively. The effects of the choice of the critical plane on previous approaches are discussed. It is shown that comparing with the maximum shear/normal strain approach, the predictions are improved by using the maximum damage plane approach, part nonproportional paths for SWT, AV and part nonproportional paths for KBM, TV paths for FS. But for LKN, the prediction results are nonconservative for some paths than that of the maximum shear/normal strain approach.

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