期刊
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
卷 48, 期 6, 页码 575-581出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijengsci.2010.01.004
关键词
Nanoporous materials; Micromechanics; Surface stress; Interfaces; Ductile failure; Gurson model
The classical Gurson model for ductile porous media is extended to incorporate the surface/interface stresses effect at the nano-scale. For capillary forces, the yield surface is shown to be obtained by a mere translation of Gurson one. For interface stresses obeying a von Mises criterion, the parametric equations of the yield surface are derived. The magnitude of the interface effect is proved to be controlled by a non dimensional parameter depending on the voids characteristic size. (C) 2010 Elsevier Ltd. All rights reserved.
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