Ductile Fracture Simulation of Structural Steels under Monotonic Tension
Publication: Journal of Structural Engineering
Volume 140, Issue 5
Abstract
This paper aims to predict ductile fracture of mild steel under monotonic loading only from the test results of notchless tensile coupons. A simple fracture model based on the concept of a damage index with only one model parameter is proposed to predict ductile fracture of structural steels. The model is based on an idea of a combination of the void growth model and Miner’s rule in incremental form. Moreover, a new method to modify the true stress-true strain data after necking initiates is proposed, and it is found that the hardening modulus of several structural steels after necking initiates is approximately the same. Finally, ductile fracture of smooth and notched steel specimens is numerically simulated for three types of structural steels, which proves simplicity and acceptable accuracy of the fracture model and the modification method of the true stress-true strain.
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Acknowledgments
The research reported herein was sponsored by the Ministry of Education under the Grant-in-Aid for Scientific Research (A) No. 23246097 with the title “Study on the coupling of buckling and fracture of steel structural members.” This financial support is sincerely acknowledged. The test data provided by Professor Iyama, Mr. Arita, Mr. Yamamoto, and Mr. Funabashi are greatly appreciated, and thanks also go to Dr. Koyama for the experimental support.
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Published In
Journal of Structural Engineering
Volume 140 • Issue 5 • May 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Feb 5, 2013
Accepted: Sep 9, 2013
Published online: Dec 31, 2013
Published in print: May 1, 2014
Discussion open until: May 31, 2014
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