Fatigue Crack Length Measurement Method Based on Edge Detection and DIC

被引：0
|
作者：
Huang X. [1 ,2 ]
Shan X. [1 ,2 ]
Gao H. [1 ,2 ]
Wang C. [1 ,2 ]
机构：
[1] School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou
[2] Key Laboratory of Special Purpose Equipment and Advanced Processing Technology of Ministry of Education, Zhejiang University of Technology, Hangzhou
来源：
Binggong Xuebao/Acta Armamentarii | 2022年 / 43卷 / 04期
关键词：
Crack closure; Crack length measurement; Digital image correlation; Edge detection; Fatigue crack; Virtual extensometer;
D O I：
10.12382/bgxb.2021.0268
中图分类号：
学科分类号：
摘要：
For the difficult detection of crack closure section due to the obvious crack closure phenomenon in advanced high-strength steel plates, a high-precision dynamic measurement method of fatigue crack length based on the combination of edge detection and digital image correlation (DIC) technology is proposed. Two cameras are used to acquire the crack images and speckle images of two sides of the crack specimen during the fatigue crack growth test for processing, which can detect the closed section of the crack which can not be detected by the gray-scale edge detection method, thereby improving measurement accuracy. The fatigue crack growth path is obtained from the crack image by the gray edge detection method, and the crack tip is initially located. Then, the template matching technology is used to map the detected crack path coordinates to the speckle image, and the virtual extensometers are arranged on both sides of the crack tip extension. The opening displacement of virtual extensometer is obtained by DIC. Then the displacement-position curve of extensometer is fitted, the characteristics of the curve are analyzed to obtain the sub-pixel precision abscissa of the fatigue crack tip, and the crack length is accurately calculated. Finally, the results obtained by the edge detection method, the proposed method, and the measuring microscope are compared. The results show that the proposed method has a significant advantage in measurement accuracy compared with the edge detection method. It can be used to effectively detect the closed section of the crack with the measurement accuracy of 8 μm. © 2022, Editorial Board of Acta Armamentarii. All right reserved.
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页码：940 / 951
页数：11
相关论文
共 28 条
  • [1] LI J X, WANG W, ZHOU Y, Et al., A review of research status of hydrogen embrittlement for automotive advanced high-strength steels, Acta Metallurgica Sinica, 56, 4, pp. 444-458, (2020)
  • [2] JIN X J, GONG Y, HAN X L, Et al., A review of current State and prospect of the manufacturing and application of advanced hot stamping automobile steels, Acta Metallurgica Sinica, 56, 4, pp. 411-427, (2020)
  • [3] NANDA T, SINGH V, SINGH G, Et al., Processing routes, resulting microstructures, and strain rate dependent deformation behaviour of advanced high strength steels for automotive applications, Archives of Civil and Mechanical Engineering, 21, 1, (2021)
  • [4] SHOJAEE M, MIDAWI A R H, BARBER B, Et al., Mechanical properties and failure behavior of resistance spot welded third-generation advanced high strength steels, Journal of Manufacturing Processes, 65, pp. 364-372, (2021)
  • [5] MANJUNATH D, ANXIN M., Crack propagation in TRIP assisted steels modeled by crystal plasticity and cohesive zone method, Theoretical and Applied Fracture Mechanics, 96, pp. 545-555, (2018)
  • [6] KRISTIN H, WAGNER M F X, MASEK B, Et al., Mechanisms of fatigue crack propagation in a Q&P-processed steel, Materials Science & Engineering A, 754, pp. 18-28, (2019)
  • [7] LOUCIF A, MORIN J B, LAPIERRE B L P, Et al., Subsurface crack initiation and propagation in an open dieforged high strength steel:a microstructural analysis, Key Engineering Materials, 880, pp. 29-34, (2021)
  • [8] CHEN R, ZHU M L, XUAN F Z., Near-tip strain evolution and crack closure of growing fatigue crack under a single tensile overload[J], International Journal of Fatigue, 134, (2020)
  • [9] WANG R W, HE Q L, ZHOU H Y, Et al., Study of plasticity-induced fatigue crack closure behavior based on DIC, Ordnance Material Science and Engineering, 42, 3, pp. 107-111, (2019)
  • [10] CARROLL J, EFSTATHIOU C, LAMBROS J, Et al., Investigation of fatigue crack closure using multiscale image correlation experiments[J], Engineering Fracture Mechanics, 76, 15, pp. 2384-2398, (2009)
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