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Ultralow cycle fatigue tests and fracture prediction models for duplex stainless-steel devices of high seismic performance braced frames

Ultralow cycle fatigue tests and fracture prediction models for duplex stainless-steel devices of high seismic performance braced frames
Ultralow cycle fatigue tests and fracture prediction models for duplex stainless-steel devices of high seismic performance braced frames

This paper presents ultralow cycle fatigue tests and the calibration of different fracture models for duplex stainless-steel devices of high seismic performance braced frames. Two different geometries of the devices were tested in full scale under 14 cyclic loading protocols up to fracture. The imposed protocols consisted of standard, constant-amplitude, and randomly generated loading histories. The test results show that the devices have stable hysteresis, high postyield stiffness, and large energy-dissipation and fracture capacities. Following the tests, two micromechanics-based models, i.e., the cyclic void growth model and the built-in ABAQUS ductile fracture model, were calibrated using monotonic and cyclic tests on circumferentially notched coupons and complementary finite-element simulations. In addition, Coffin-Manson-like relationships were fitted to the results of the constant-amplitude tests of the devices, and the Palmgren-Miner's rule was used to predict fracture of the devices under the randomly generated loading protocols. Comparisons of the experimental and numerical results show that the calibrated models can predict ductile fracture of the devices due to ultralow cycle fatigue with acceptable accuracy.

0733-9445
Baiguera, Marco
e2334b1a-8eaa-4624-b177-ccdaf80dd94c
Vasdravellis, George
cc4c93ee-c111-4302-a27e-2d99126a18fc
Karavasilis, Theodore L.
15850eb0-6af4-4b6e-bab4-d5bde281b769
Baiguera, Marco
e2334b1a-8eaa-4624-b177-ccdaf80dd94c
Vasdravellis, George
cc4c93ee-c111-4302-a27e-2d99126a18fc
Karavasilis, Theodore L.
15850eb0-6af4-4b6e-bab4-d5bde281b769

Baiguera, Marco, Vasdravellis, George and Karavasilis, Theodore L. (2019) Ultralow cycle fatigue tests and fracture prediction models for duplex stainless-steel devices of high seismic performance braced frames. Journal of Structural Engineering, 145 (1). (doi:10.1061/(ASCE)ST.1943-541X.0002243).

Record type: Article

Abstract

This paper presents ultralow cycle fatigue tests and the calibration of different fracture models for duplex stainless-steel devices of high seismic performance braced frames. Two different geometries of the devices were tested in full scale under 14 cyclic loading protocols up to fracture. The imposed protocols consisted of standard, constant-amplitude, and randomly generated loading histories. The test results show that the devices have stable hysteresis, high postyield stiffness, and large energy-dissipation and fracture capacities. Following the tests, two micromechanics-based models, i.e., the cyclic void growth model and the built-in ABAQUS ductile fracture model, were calibrated using monotonic and cyclic tests on circumferentially notched coupons and complementary finite-element simulations. In addition, Coffin-Manson-like relationships were fitted to the results of the constant-amplitude tests of the devices, and the Palmgren-Miner's rule was used to predict fracture of the devices under the randomly generated loading protocols. Comparisons of the experimental and numerical results show that the calibrated models can predict ductile fracture of the devices due to ultralow cycle fatigue with acceptable accuracy.

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More information

Accepted/In Press date: 16 July 2018
e-pub ahead of print date: 30 October 2018
Published date: 1 January 2019

Identifiers

Local EPrints ID: 428993
URI: https://eprints.soton.ac.uk/id/eprint/428993
ISSN: 0733-9445
PURE UUID: 7a32c4d1-b00e-4380-a888-42b77482ea74
ORCID for Theodore L. Karavasilis: ORCID iD orcid.org/0000-0003-2553-5389

Catalogue record

Date deposited: 15 Mar 2019 17:30
Last modified: 11 Jul 2019 16:30

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