Yuntao Wang, Yunhong Cheng, Nianchun Lü, Jin Cheng

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College of Mechanical Engineering, Liaoning Technical University, Fuxin, China.
Department of Civil Engineering, Northeastern University, Shenyang, China.
School of Material Science and Engineering, Shenyang Ligong University, Shenyang, China.
Department of Astronautics and Mechanics, Harbin Institute of Technology, Harbin, China.
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Abstract: An elastic analysis of an internal central crack with bridging fibers parallel to the free surface in an infinite orthotropic anisotropic elastic plane was analyzed, and the crack extension should occur in the format of self-similarity. When the fiber strength is over its maximum tensile stress, the fiber breaks. By means of complex variable functions, the problem considered can be easily translated into Reimann-Hilbert mixed boundary value problem. Utilizing the built dynamic model of bridging fiber pull-out in unidirectional composite materials, analytical solutions of the displacements, stresses and stress intensity factors under the action of increasing loads Pt5/x5, Px5/t4 are obtained, respectively. After those analytical solutions were used by superposition theorem, the solutions to arbitrary complex problems were acquired.

Keywords: Composite Materials; Bridging Fibers; Analytical Solutions; Crack; Variable Loads

Cite this paper: Wang, Y. , Cheng, Y. , Lü, N. and Cheng, J. (2013) Analytical Solutions of Dynamic Crack Models of Bridging Fiber Pull-Out in Unidirectional Composite Materials. Modern Mechanical Engineering, 3, 191-201. doi: 10.4236/mme.2013.34026.

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