Ultra-low Cycle Fatigue Fracture of High-Strength Steel Q460C and Its Weld
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 11
Abstract
In order to investigate the ultra-low cycle fatigue (UCLF) fracture in welded connections of high-strength steel (HSS) under earthquakes, this paper studies micromechanical fracture models for Q460C steel, which has wide application prospects in China. Notched round bars and smooth round bars, which were manufactured from base metal, heat-affected zone (HAZ), and weld metal of Q460C HSS, were tested under monotonic loading and cyclic loading, respectively. The fracture surface of tensile specimens were analyzed by scanning electron microscope (SEM) tests. This paper presents the results, including the skeleton curve, hysteresis loops, low cycle fatigue life, and characteristic length . By comparing the experimental results with the finite-element analyses, the toughness parameters of the void growth model (VGM), the stress-modified critical strain (SMCS) model, and the cyclic void growth model (CVGM) of Q460C HSS and its weld were calibrated. Results indicate that the toughness parameters of various materials for HSS are generally lower than that of normal strength steel. Also, in the welded beam-to-column connections, the HAZ requires more attention. The results can be used to effectively and accurately evaluate the UCLF fracture in welded HSS connections.
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Acknowledgments
This study was financially supported by Beijing Nova Plan of Science and Technology, Grant No. 2016117, Natural Science Foundation of China, Grant No. 51408013. The authors extend special thanks to Dr. Zhou Hui. During his lifetime, Dr. Zhou gave a lot of valuable advice for this study. All his help is greatly appreciated.
References
AISC. 2010. Seismic provisions for structural steel buildings. ANSI/AISC 341-10. Chicago: AISC.
Ballio, G., and C. A. Castiglioni. 1995. “A unified approach for the design of steel structures under low and/or high cycle fatigue.” J. Constr. Steel Res. 34 (1): 75–101. https://doi.org/10.1016/0143-974X(95)97297-B.
Ban, H. Y., G. Shi, Y. J. Shi, and Y. Q. Wang. 2011. “Research progress on the mechanical property of high strength structural steels.” Adv. Mater. Res. 250–253 (1–4): 640–648. https://doi.org/10.4028/www.scientific.net/AMR.250-253.640.
CEN (European Committee for Standardization). 2004. Design of structures for earthquake resistance—Part 1: General rules, seismic actions and rules for buildings. Eurocode 8. Brussels: CEN.
Chi, W. M., A. M. Kanvinde, and G. G. Deierlein. 2006. “Prediction of ductile fracture in steel connections using SMCS criterion.” J. Struct. Eng. 132 (2): 171–181. https://doi.org/10.1061/(ASCE)0733-9445(2006)132:2(171).
Coffin, L. F. Jr. 1954. “A study of the effects of cyclic thermal stresses on a ductile metal.” Trans. ASME 76: 931–950.
Hancock, J. W., and A. C. Mackenzie. 1976. “On the mechanisms of ductile failure in high-strength steels subjected to multi-axial stress-states.” J. Mech. Phys. Solids 24 (2): 147–160. https://doi.org/10.1016/0022-5096(76)90024-7.
Hawileh, R. A., J. A. Abdalla, F. Oudah, and K. Abdelrahman. 2010. “Low-cycle fatigue life behaviour of BS 460B and BS B500B steel reinforcing bars.” Fatigue Fract. Eng. Mater. Struct. 33 (7): 397–407. https://doi.org/10.1111/j.1460-2695.2010.01452.x.
Irwin, G. R. 1957. “Analysis of stresses and strains near end of a crack traversing a plate.” J. Appl. Mech. 24: 361–364.
Iyama, J., and J. M. Ricles. 2009. “Prediction of fatigue life of welded beam-to-column connections under earthquake loading.” J. Struct. Eng. 135 (12): 1472–1480. https://doi.org/10.1061/(ASCE)0733-9445(2009)135:12(1472).
Javidan, F., A. Heidarpour, X. L. Zhao, and H. Fallahi. 2017. “Fundamental behaviour of high strength and ultra-high strength steel subjected to low cycle structural damage.” Eng. Struct. 143: 427–440. https://doi.org/10.1016/j.engstruct.2017.04.041.
Jia, L. J., and H. Kuwamura. 2015. “Ductile fracture model for structural steel under cyclic large strain loading.” J. Constr. Steel Res. 106: 110–121. https://doi.org/10.1016/j.jcsr.2014.12.002.
Jia, Z. H. 2017. “Research on fracture behaviours of weld steel based on micromechanical models.” Master dissertation, Beijing Univ. of Technology.
Kanvinde, A. M., and G. G. Deierlein. 2006. “Void growth model and stress modified critical strain model to predict ductile fracture in structural steels.” J. Struct. Eng. 132 (12): 1907–1918. https://doi.org/10.1061/(ASCE)0733-9445(2006)132:12(1907).
Kanvinde, A. M., and G. G. Deierlein. 2007. “Cyclic void growth model to assess ductile fracture initiation in structural steels due to ultra low cycle fatigue.” J. Struct. Eng. 133 (6): 701–712. https://doi.org/10.1061/(ASCE)0733-9399(2007)133:6(701).
Kiran, R., and K. Khandelwal. 2015. “A micromechanical cyclic void growth model for ultra-low cycle fatigue.” Int. J. Fatigue 70: 24–37. https://doi.org/10.1016/j.ijfatigue.2014.08.010.
Kuwamura, H. 1998. “Fracture of steel during an earthquake—State-of-the-art in Japan.” Eng. Struct. 20 (4–6): 310–322. https://doi.org/10.1016/S0141-0296(97)00030-8.
Kuwamura, H., and K. Yamamoto. 1997. “Ductile crack as trigger of brittle fracture in steel.” J. Struct. Eng. 123 (6): 729–735. https://doi.org/10.1061/(ASCE)0733-9445(1997)123:6(729).
Lemaitré, J., and J.-L. Chaboche. 1990. Mechanics of solid materials. Cambridge, UK: Cambridge University Press.
Liao, F. F., W. Wang, and Y. Y. Chen. 2012. “Parameter calibrations and application of micromechanical fracture models of structural steels.” Struct. Eng. Mech. 42 (2): 153–174. https://doi.org/10.12989/sem.2012.42.2.153.
Liao, F. F., W. Wang, and Y. Y. Chen. 2015. “Ductile fracture prediction for welded steel connections under monotonic loading based on micromechanical fracture criteria.” Eng. Struct. 94: 16–28. https://doi.org/10.1016/j.engstruct.2015.03.038.
Liu, X. Y., Y. Q. Wang, L. Zong, Y. Lin, and Y. J. Shi. 2014. “Experimental study on mechanical properties and toughness of Q460C high-strength steel and its butt welded joint at low temperature.” Int. J. Steel Struct. 14 (3): 457–469. https://doi.org/10.1007/s13296-014-3003-z.
Manson, S. S. 1954. Behavior of materials under conditions of thermal stress. Cleveland: Lewis Flight Propulsion Laboratory.
Miller, D. K. 1998. “Lessons learned from the Northridge earthquake.” Eng. Struct. 20 (4–6): 249–260. https://doi.org/10.1016/S0141-0296(97)00031-X.
Möller, B., J. Baumgartner, R. Wagener, H. Kaufmann, and T. Melz. 2017. “Low cycle fatigue life assessment of welded high-strength structural steels based on nominal and local design concepts.” Int. J. Fatigue 101 (2): 192–208. https://doi.org/10.1016/j.ijfatigue.2017.02.014.
Ramberg, W., and W. R. Osgood. 1943. Description of stress-strain curves by three parameters. Washington, DC: National Advisory Committee for Aeronautics.
Rice, J. R., and G. F. Rosengren. 1968. “Plane strain deformation near a crack tip in a power-law hardening material.” J. Mech. Phys. Solids 16 (1): 1–12. https://doi.org/10.1016/0022-5096(68)90013-6.
SAC (Standardization Administration of the People’s Republic of China). 2003. Code for design of steel structures. GB 50017-2003. Beijing: SAC.
SAC (Standardization Administration of the People’s Republic of China). 2008. Code for high strength low alloy structural steel. GB/T 1591-2008. Beijing: SAC.
SAC (Standardization Administration of the People’s Republic of China). 2010. Code for seismic design of buildings. GB 50011-2010. Beijing: SAC.
Shi, G., M. Wang, Y. Bai, F. Wang, Y. Shi, and Y. Wang. 2012. “Experimental and modeling study of high-strength structural steel under cyclic loading.” Eng. Struct. 37 (7): 1–13. https://doi.org/10.1016/j.engstruct.2011.12.018.
Wang, Y. B., G. Q. Li, W. Cui, S. W. Chen, and F. F. Sun. 2015. “Experimental investigation and modeling of cyclic behavior of high strength steel.” J. Constr. Steel Res. 104: 37–48. https://doi.org/10.1016/j.jcsr.2014.09.009.
Wells, A. A. 1963. “Application of fracture mechanics at and beyond general yield.” Br. Weld. J. 10: 563–570.
Zhou, H. 2013. “Investigations on fracture and fatigue behaviours of steel connections based on global-local models.” Ph.D. dissertation, Dept. of Civil Engineering, Tsinghua Univ.
Zhou, H., Y. Q. Wang, Y. J. Shi, J. Xiong, and L. Yang. 2013. “Extremely low cycle fatigue prediction of steel beam-to-column connection by using a micro-mechanics based fracture model.” Int. J. Fatigue 48 (2): 90–100. https://doi.org/10.1016/j.ijfatigue.2012.10.006.
Zhou, H., Y. Q. Wang, L. Yang, and Y. Shi. 2014. “Seismic low-cycle fatigue evaluation of welded beam-to-column connections in steel moment frames through global-local analysis.” Int. J. Fatigue 64 (7): 97–113. https://doi.org/10.1016/j.ijfatigue.2014.03.002.
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Published In
Journal of Materials in Civil Engineering
Volume 30 • Issue 11 • November 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jan 31, 2018
Accepted: May 1, 2018
Published online: Aug 11, 2018
Published in print: Nov 1, 2018
Discussion open until: Jan 11, 2019
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