Free-Edge Stress Singularity in a Two-Dimensional Unidirectional Viscoelastic Laminate Model

[+] Author and Article Information
Sang Soon Lee

Reactor Mechanical Engineering Department, Korea Atomic Energy Research Institute, Taejon, South Korea 305-600

J. Appl. Mech 64(2), 408-414 (Jun 01, 1997) (7 pages) doi:10.1115/1.2787323 History: Received January 04, 1996; Revised September 12, 1996; Online October 25, 2007


This paper concerns the stress singularity at the interface corner between the perfectly bonded fiber and the matrix of a unidirectional two-dimensional laminate model subjected to a uniform transverse tensile strain. The matrix is assumed to be a linear viscoelastic material. The standard Laplace transform and the Mellin transform techniques are employed to get the characteristic equation and the order of singularity is obtained numerically for a given viscoelastic model. The time-domain boundary element method is used to investigate the behavior of stresses for the whole interface. It is shown that the order of singularity increases with time while the free-edge stress intensity factor is relaxed with time.

Copyright © 1997 by The American Society of Mechanical Engineers
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