[1] Yue ZhongwenSong YaoHan RuijieZhang Wang, Guo Chao,. Experimental study on dynamic fracture behaviorof three-point bending beam with double deformity inclusions [J]. Journal of Southeast University (English Edition), 2016, 32 (3): 333-338. [doi:10.3969/j.issn.1003-7985.2016.03.013]

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Experimental study on dynamic fracture behaviorof three-point bending beam with double deformity inclusions()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

32

Issue:

2016 3

Page:

333-338

Research Field:

Mathematics, Physics, Mechanics

Publishing date:

2016-09-20

Info

Title:

Experimental study on dynamic fracture behaviorof three-point bending beam with double deformity inclusions

Author(s):

Yue ZhongwenSong YaoHan RuijieZhang Wang;  Guo Chao

School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, China

Keywords:

dynamic caustics;  deformity inclusion;  dynamic stress intensity factor;  crack propagation velocity

PACS:

O346.1

DOI:

10.3969/j.issn.1003-7985.2016.03.013

Abstract:

The dynamic fracture behavior of the three-point bending beam with double deformity inclusions under impact loading is studied by using digital high-speed photography in combination with the transmission-type dynamic caustic method. The experimental results indicate that the fluctuation of crack propagation velocity v first increases and then decreases in the crack propagation process. During the process of crack propagating into the inclusion area, the fracture resistance effect of the circular inclusion is the most significant and the effects of triangular and square inclusions are less obvious. The stress intensity factor near the crack tip increases during the propagation process and reaches its maximum value when the crack tip is close to the inclusions. The crack tip’s dynamic stress intensity factor(DSIF)decreases when the crack exceeds the middle area of the double inclusions. These results provide an experimental basis and scientific foundation to strengthen the evaluation and fracture analysis of the structure containing deformity inclusions.

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Memo

Memo:

Biography: Yue Zhongwen(1975—), male, doctor, associate professor, zwyue75@163.com.
Foundation items: The National Basic Research Program of China(973 Program)(No.2011CB606105), the National Natural Science Foundation of China(No.51374210, 51134025).
Citation: Yue Zhongwen, Song Yao, Han Ruijie, et al. Experimental study on dynamic fracture behavior of three-point bending beam with double deformity inclusions[J].Journal of Southeast University(English Edition), 2016, 32(3):333-338.DOI:10.3969/j.issn.1003-7985.2016.03.013.

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