|Table of Contents|

[1] Yue Zhongwen, Han Ruijie, Zhang Wang, Liu Wei, et al. Dynamic caustics experimental study on interaction betweenpropagating crack and deformity inclusions in primary structure [J]. Journal of Southeast University (English Edition), 2016, 32 (1): 73-77. [doi:10.3969/j.issn.1003-7985.2016.01.013]
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Dynamic caustics experimental study on interaction betweenpropagating crack and deformity inclusions in primary structure()
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
32
Issue:
2016 1
Page:
73-77
Research Field:
Mathematics, Physics, Mechanics
Publishing date:
2016-03-20

Info

Title:
Dynamic caustics experimental study on interaction betweenpropagating crack and deformity inclusions in primary structure
Author(s):
Yue Zhongwen1 Han Ruijie1 Zhang Wang1 Liu Wei2
1School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, China
2Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
Keywords:
dynamic caustics deformity inclusion dynamic stress intensity factor(DSIF) crack propagation velocity
PACS:
O346.1
DOI:
10.3969/j.issn.1003-7985.2016.01.013
Abstract:
The approach combining the dynamic caustics method with high-speed photography technology is used to study the interaction between propagating cracks and three kinds of deformity inclusions(cylinder inclusion, quadruple inclusion and triangular inclusion)under low velocity impact loading. By recording the caustic spots of crack tips at different moments during the crack propagation, the variation regulations of dynamic stress intensity factors(DSIF)and crack growth velocity with respect to time are obtained. The experimental results show that the resistance effects to crack growth are varied with different shapes of inclusions in specimens, and the quadruple inclusion’s effect is more apparent. The distortion degree of caustic spots is affected by the shapes of inclusions as well, and the situation is more serious for cylinder and quadruple inclusions. The overall values of DSIFs of triangular inclusion specimen are greater than the others, and the crack growth velocities, characteristic sizes and DSIFs show processes of fluctuations because of the disturbance of reflection waves in specimens. The results provide an experimental basis for the analysis of strength and impact-resistance ability in structures with deformity inclusions.

References:

[1] Yao X F, Xu W. Recent application of caustics on experimental dynamic fracture studies[J]. Fatigue & Fracture of Engineering Materials & Structures, 2011, 34(6): 448-459.
[2] Rosakis A J. Analysis of the optical method of caustics for dynamic crack propagation[J]. Engineering Fracture Mechanics, 1980, 13(2): 331-347. DOI: 10.1016/0013-7944(80)90063-6.
[3] Yang R S, Yue Z W, Sun Z H, et al. Dynamic fracture behavior of rock under impact load using the caustics method[J]. Mining Science and Technology, 2009, 19(1): 79-83. DOI: 10.1016/S1674-5264(09)60015-6.
[4] Yao X F, Xu W, Xu M Q, et al. Experimental study of dynamic fracture behavior of PMMA with overlapping offset-parallel cracks[J]. Polymer Testing, 2003, 22(6): 663-670.
[5] Yao X, Chen J, Jin G, et al. Caustic analysis of stress singularities in orthotropic composite materials with mode-Ⅰ crack[J]. Composites Science & Technology, 2004, 64(7/8): 917-924.
[6] Yue Z W, Yang R S, Sun Z H, et al. Impact fracture experiment of crack rock with inclined edge[J]. Journal of Coal Science & Engineering(China), 2010, 35(9): 1456-1460.(in Chinese)
[7] Papadopoulos G A, Papanicolaou G C. Dynamic crack propagation in rubber-modified composite models[J]. Journal of Materials Science, 1988, 23(10): 3421-3434. DOI: 10.1007/BF00540474.
[8] Theocaris P S, Katsamanis P. Response of cracks to impact by caustics[J]. Engineering Fracture Mechanics, 1978, 10(2):197-210.
[9] Katsamanis F, Raftopoulos D, Theocaris P S. Static and dynamic stress intensity factors by the method of transmitted caustics[J]. Journal of Engineering Materials and Technology, 1977, 99(2): 105-109. DOI:10.1115/1.3443417.
[10] Beinert J, Kalthoff J F. Experimental determination of dynamic stress intensity factors by shadow patterns[M]//Experimental Evaluation of Stress Concentration and Intensity Factors. Berlin: Springer, 1981: 281-330.
[11] Jajam K C, Tippur H V. Role of inclusion stiffness and interfacial strength on dynamic matrix crack growth: An experimental study[J]. International Journal of Solids and Structures, 2012, 49(9): 1127-1146. DOI:10.1016/j.ijsolstr.2012.01.009.
[12] Yao X F, Jin G C, Arakawa K, et al. Experimental studies on dynamic fracture behavior of thin plates with parallel single edge cracks[J]. Polymer Testing, 2002, 21(8): 933-940.
[13] Yao X F, Xu W, Jin G C, et al. Low velocity impact study of laminate composites with mode Ⅰ crack using dynamic optical caustics [J]. Journal of Reinforced Plastics & Composites, 2004, 23(17): 1833-1844.
[14] Gong K Z, Li Z. Caustics method in dynamic fracture problem of orthotropic materials [J]. Optics and Lasers in Engineering, 2008, 46(8): 614-619. DOI: 10.1016/j.optlaseng.2008.03.019.
[15] Gao G Y, Li Z, Xu J. Optical method of caustics applied in viscoelastic fracture analysis[J]. Optics and Lasers in Engineering, 2011, 49(5): 632-639. DOI:10.1016/j.optlaseng.2011.01.012.

Memo

Memo:
Biography: Yue Zhongwen(1975—), male, doctor, associate professor, zwyue75@163.com.
Foundation items: The National Natural Science Foundation of China(No.51374210, 51134025), the 111 Project(No.B14006).
Citation: Yue Zhongwen, Han Ruijie, Zhang Wang, et al. Dynamic caustics experimental study on interaction between propagating crack and deformity inclusions in primary structure[J].Journal of Southeast University(English Edition), 2016, 32(1):73-77. DOI:10.3969/j.issn.1003-7985.2016.01.013.
Last Update: 2016-03-20