Journal
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
Volume 160, Issue -, Pages 134-147Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijsolstr.2018.10.019
Keywords
Crack penetration; Deflection condition; Fracture toughness
Categories
Funding
- Independent Innovation Project for Double First-level Construction (China University of Mining and Technology)
- National 973 Basic Research Program of China [2015CB251602]
- Natural Science Foundation of Jiangsu Provinve in China [BK20180636]
- Fundamental Research Funds for the Central Universities of China [2018ZDPY04]
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With the development of interface-rich composites, crack penetration deflection at the interfaces have been the focus of considerable research studies. Because the F-criterion may imperceptibly enlarge the potential crack deflection range, a modification was made and related numerical analyses were then conducted. It was found that the modified F-criterion is as effective as the F-criterion and not affected by the fracture toughness ratio of mode II to mode I, when predicting the crack penetration direction. Furthermore, based on the modified F-criterion, the potential crack deflection range gradually shrinks, as the friction coefficient on crack surfaces and the fracture toughness ratio of mode II to mode I increase. However, as the surface pressure increases, the potential crack deflection range gradually broadens. In general, the result that is based on the modified F-criterion is no more than the one that is based on the F-criterion, when predicting the potential crack deflection range. Additionally, in accordance with the modified F-criterion, crack deflection caused by shear failure occurs only when the mode II fracture toughness is similar to the mode I fracture toughness. Otherwise, tensile failure is the exclusive reason for crack deflection. (C) 2018 Elsevier Ltd. All rights reserved.
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