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RESEARCH PAPERS

Delamination Specimens for Orthotropic Materials

[+] Author and Article Information
Zhigang Suo

Division of Applied Sciences, Harvard University, Cambridge, MA 02138

J. Appl. Mech 57(3), 627-634 (Sep 01, 1990) (8 pages) doi:10.1115/1.2897068 History: Received November 21, 1988; Revised July 28, 1989; Online March 31, 2008

Abstract

A semi-infinite crack in an infinite strip of orthotropic material is analyzed. Analytic expressions for mixed-mode stress intensity factors are derived with only parameter undetermined, which is then extracted from numerical solutions to integral equations. The results are relatively simple and complete, and provide the flexibility to simulate a wide range of practical problems, such as fracture specimens and edge delamination phenomena of woods and fiber-reinforced composites. As an illustration, specimens with transverse splitting from notches are analyzed based on the general solution. The validity of using solutions for an isotropic material to calibrate some testing geometries of orthotropic materials is discussed.

Copyright © 1990 by The American Society of Mechanical Engineers
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