Journal
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
Volume 50, Issue 12, Pages 2509-2537Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0022-5096(02)00050-9
Keywords
thin interphase; imperfect interface; displacement jump; traction jump; coated fiber
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The imperfect interface conditions which are equivalent to the effect of a thin elastic interphase are derived by a Taylor expansion method in terms of interface displacement and traction jumps. Plane and cylindrical interfaces are analyzed as special cases. The effective elastic moduli of a unidirectional coated fiber composite are obtained on the basis of the derived imperfect interface conditions. High accuracy of the method is demonstrated by comparison of solutions of several problems in terms of the imperfect interface conditions or explicit presence of interphase as a third phase. The problems considered are transverse shear of a coated infinite fiber in infinite matrix and effective transverse bulk and shear moduli and effective axial shear modulus of a coated fiber composite. Unlike previous elastic imperfect interface conditions in the literature, the present ones are valid for the entire range of interphase stiffness, from very small to very large. (C) 2002 Elsevier Science Ltd. All rights reserved.
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