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In‐plane shearing stress–strain response of glass‐fiber‐reinforced composites as determined from four‐point bending tests
Author(s) -
Sideridis E.,
Kyriazi E.
Publication year - 1995
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1995.070551001
Subject(s) - materials science , composite material , shearing (physics) , composite number , shear modulus , plane stress , shear stress , modulus , fiber reinforced composite , glass fiber , shear (geology) , interphase , finite element method , structural engineering , biology , engineering , genetics
In this article an experimental study to determine the longitudinal (or in‐plane) shearing stress–strain response of a unidirectional fiber‐reinforced composite material is presented. The test method used is the four‐point blending of a ±45° off‐axis glass‐fiber‐reinforced laminate. Although a laminate is used for the investigation of the shearing stress–strain response, it is shown that unidirectional shear properties can be found from the laminate test data following a procedure analogous to that used in previously. Also, the 45° off‐axis test of unidirectional composite in bending was carried out to obtain the in‐plane shear modulus and compare it with that obtained by the ±45° off‐axis method. Finally both values were compared with the theoretical value of the in‐plane shear modulus obtained from a theoretical formula where the concept of boundary interphase between fiber and matrix was introduced. © 1995 John Wiley & Sons, Inc.