Ultralow Cycle Fatigue Tests and Fracture Prediction Models for Duplex Stainless-Steel Devices of High Seismic Performance Braced Frames

Marco Baiguera, George Vasdravellis, Theodore L. Karavasilis

Research output: Contribution to journalArticle

8 Citations (Scopus)
31 Downloads (Pure)

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.

Original languageEnglish
Article number04018230
JournalJournal of Structural Engineering
Volume145
Issue number1
Early online date30 Oct 2018
DOIs
Publication statusPublished - Jan 2019

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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