On ductile fracture of 30CrMnSiNi2A steel considering effects of stress triaxiality

被引：0
|
作者：
Yu W. [1 ]
Yu R. [1 ]
Cui S. [2 ]
机构：
[1] Xi'an Modern Control Technology Research Institute, Xi'an
[2] CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei
来源：
Baozha Yu Chongji/Explosion and Shock Waves | 2021年 / 41卷 / 03期
关键词：
30CrMnSiNi2A steel; Ductile fracture; Dynamic mechanical behavior; Stress triaxiality;
D O I：
10.11883/bzycj-2020-0334
中图分类号：
学科分类号：
摘要：
30CrMnSiNi2A steel is a high-strength low-alloy steel and it is widely used in the defense industry. Its ductile fracture properties were investigated by using a combined experimental-numerical approach to address the need for assessment of structural integrity. The parameters of the Johnson-Cook constitutive model were obtained through quasi-static and dynamic tensile tests on round bar specimens at different temperatures and relevant finite element method iterations. The effects of strain rate and temperature on fracture were studied. The tensile tests on notched round bar specimens were performed to calibrate the fracture strain in the range of high positive stress triaxiality. The tensile tests on butterfly plates and compression tests on short cylindrical specimens covered the fracture properties in the range of low and negative stress triaxiality. The finite element models were computed and the fracture loci in the space of the effective plastic strain to fracture and the stress triaxiality in a wide range from −1/3 to 1.5 were constructed. The parameters of the Johnson-Cook fracture model and Bao-Wierzbicki fracture model were calibrated. It is shown that stress triaxiality has a significant effect on the fracture of 30CrMnSiNi2A steel and the monotonicity of the fracture loci varies in different stress triaxiality range. The Bao-Wierzbicki model is capable of predicting the fracture patterns of the 30CrMnSiNi2A steel in different stress states. © 2021, Editorial Staff of EXPLOSION AND SHOCK WAVES. All right reserved.
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  • [1] WU H J, YAO W, HUANG F L, Et al., Experimental study on dynamic mechanical properties of ultrahigh strength 30CrMnSiNi2A steel, Transactions of Beijing Institute of Technology, 30, 3, pp. 258-262, (2010)
  • [2] ZHOU Y Q, ZHANG Z M., Mechanical property of 30CrMnSiNi2A steel under various strain rates, Ordnance Material Science and Engineering, 33, 4, pp. 46-50, (2010)
  • [3] LI L, ZHANG X F, WU X, Et al., Dynamic constitutive and damage parameters of 30CrMnSiNi2A steel with different hardnesses, Chinese Journal of High Pressure Physics, 31, 3, pp. 239-248, (2017)
  • [4] HANCOCK J W, MACKENZIE A C., On the mechanisms of ductile failure in high-strength steels subjected to multi-axial stress-states, Journal of the Mechanics and Physics of Solids, 24, pp. 147-169, (1976)
  • [5] MIRZA M S, BARTON D C, CHURCH P., The effect of stress triaxiality and strain-rate on the fracture characteristics of ductile metals, Journal of Materials Science, 31, 2, pp. 453-461, (1996)
  • [6] CLAUSEN A H, BORVIK T, HOPPERSTAD O S, Et al., Flow and fracture characteristics of aluminium alloy AA5083-H116 as function of strain rate, temperature and triaxiality, Materials Science and Engineering: A, 364, 1−2, pp. 260-272, (2004)
  • [7] BAO Y B, WIERZBICKI T., On fracture locus in the equivalent strain and stress triaxiality space, International Journal of Mechanical Sciences, 46, 1, pp. 81-98, (2004)
  • [8] LI Y, WU W G, ZHU H Q, Et al., Fracture properties of ship-build mild steel in wide range of stress triaxiality, Shipbuilding of China, 57, 3, pp. 54-64, (2016)
  • [9] ZHANG P, ZHAO M Y, LI Y, Et al., Failure strain sharp-down of marine mild steel under complex stress states, Journal of Ship Mechanics, 24, 2, pp. 191-196, (2020)
  • [10] GUI L J, GAO F H, FAN Z J., Study of failure criterion of advanced high strength steel, Chinese Journal of Solid Mechanics, 33, 4, pp. 395-403, (2012)
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