TITLE:
Analytical Solutions of Dynamic Crack Models of Bridging Fiber Pull-Out in Unidirectional Composite Materials
AUTHORS:
Yuntao Wang, Yunhong Cheng, Nianchun Lü, Jin Cheng
KEYWORDS:
Composite Materials; Bridging Fibers; Analytical Solutions; Crack; Variable Loads
JOURNAL NAME:
Modern Mechanical Engineering,
Vol.3 No.4,
November
29,
2013
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.