期刊
BUILDINGS
卷 12, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/buildings12122128
关键词
scanning electron microscope; ML15 cold heading steel; ductile fracture; stress triaxiality; Lode angle parameter
资金
- Fundamental Research Funds for the Central Universities [2572019AB15]
- Blue Valley to Jiaodong International Airport Fast Track Project
This paper investigates the fracture behavior of ML15 cold heading steel based on the ductile fracture theory. Different types of specimens were designed and tested, and the micro fracture morphologies were examined using scanning electron microscopy. The Rice-Tracey model and Bai-Wierzbicki model were calibrated and used for finite element analysis, showing the feasibility of the calibrated fracture locus for metal failure analysis.
In this paper, the fracture behavior of ML15 cold heading steel was investigated based on the ductile fracture theory. Smooth and notched bar, flat grooved and tensile-shear mixed flat plate specimens were designed, and tensile tests were carried out to examine the fracture mechanism of ML15. The micromechanical characteristics of the fracture surfaces of different specimens were studied by performing scanning electron microscopy. The results showed that the specimens under different stress states showed different micro fracture morphologies. The Rice-Tracey model and Bai-Wierzbicki model were calibrated using test results. Based on the calibrated fracture locus, a finite element model is developed and compared to the test results, which confirms the feasibility of the calibrated fracture locus for metal failure analysis.
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