Abstract
To better predict ductile fracture (DF) of structural steels under complicated stress states, the DF of an A36 steel was experimentally and numerically investigated within a wide range of stress states. Meanwhile, a scanning electron microscope (SEM) analysis was performed to shed more light on the DF microscopic mechanism of the material tested. The correlations between the ductility and the stress states for the A36 steel were identified using four representative uncoupled DF models, which are endowed with different stress triaxiality () and Lode parameter () dependence. In addition, the experimental results of an AISI 1045 steel, covering a wider range of stress states (; ), were revisited. By evaluating the three-dimensional (3D) fracture loci of the A36 and AISI 1045 steels using distinct models, it was concluded that an appropriate model should be featured with flexible and dependence as well as the asymmetry with respect to the plane of .
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The authors gratefully acknowledge the financial support provided by the Special Fund of Chinese Central Government for Basic Scientific Research Operations in Commonweal Research Institutes under Grant No. 2017-9035.
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Published In
Journal of Materials in Civil Engineering
Volume 33 • Issue 1 • January 2021
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© 2020 American Society of Civil Engineers.
History
Received: Mar 16, 2020
Accepted: Jul 7, 2020
Published online: Oct 26, 2020
Published in print: Jan 1, 2021
Discussion open until: Mar 26, 2021
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