A discrete-fibers model for bridged cracks and reinforced elliptical voids

被引：20

作者：

Bertoldi, K.

Bigoni, D.

Drugan, W. J.

机构：

[1] Univ Trent, Dipartimento Ingn Meccan & Strutturale, I-38050 Trento, Italy

[2] MIT, Dept Mech Engn, Cambridge, England

[3] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA

来源：

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS | 2007年 / 55卷 / 05期

关键词：

fracture mechanics; mechanical interfaces; elliptical reinforced voids; structural interfaces; reinforced cracks;

D O I：

10.1016/j.jmps.2006.10.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A model of crack bridging and reinforced elliptical voids is proposed, in which the fibers joining the surfaces of the void or crack are modelled as discrete, linear elastic bars. We show that a theory recently developed by us to analyze structural interfaces permits analytical attack and solution of multiple important previously unsolved problems of stress concentration and fracture. In particular, an analytical solution is provided for a reinforced elliptical void, which, by superposition, allows treatment of arbitrary fiber distributions, which can be even randomly distributed and oriented. In the special case of small or null ratio between a void's axes, new stress intensity factor expressions are obtained, which account for fibers' inclination and geometry. (C) 2006 Elsevier Ltd. All rights reserved.

引用

页码：1016 / 1035

页数：20

共 14 条

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Barenblatt GI., 1962, ADV APPL MECH, V7, P55, DOI DOI 10.1016/S0065-2156(08)70121-2

[2] Structural interfaces in linear elasticity. Part I: Nonlocality and gradient approximations [J].