期刊
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
卷 43, 期 10, 页码 3025-3043出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijsolstr.2005.06.057
关键词
micropolar; composite; ellipsoidal fiber; micromechanics; plasticity; effective property
类别
A general micromechanical method is developed for a micropolar composite with ellipsoidal fibers, where the matrix material is idealized as a micropolar material model. The method is based on a special micro-macro transition method, and the classical effective moduli for micropolar composites can be determined in an analytical way. The influence of both fiber's shape and size can be analyzed by the proposed method. The effective moduli, initial yield surface and effective nonlinear stress and strain relation for a micropolar composite reinforced by ellipsoidal fibers are examined, it is found that the prediction on the effective moduli and effective nonlinear stress and strain curves are always higher than those based on classical Cauchy material model, especially for the case where the size of fiber approaches to the characteristic length of matrix material. As expected, when the size of fiber is sufficiently large, the classical results (size-independence) can be recovered. (c) 2005 Elsevier Ltd. All rights reserved.
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