Stress intensity factors for an edge interface crack in a bonded semi-infinite plate for arbitrary material combination

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:49

Article

Noda, Nao-Aki¹  Lan, Xin¹ 

[1] Kyushu Inst Technol, Dept Mech Engn, Tobata Ku, Kitakyushu, Fukuoka 8048550, Japan

关键词: Stress intensity factor;    Edge interface crack;    Bonded semi-infinite plate;    Material combination;    Finite element method;   

DOI  :  10.1016/j.ijsolstr.2012.02.001

来源: Elsevier

【 摘 要 】

Although a lot of interface crack problems were previously treated, few solutions are available under arbitrary crack lengths and material combinations. In this paper the stress intensity factors of an edge interface crack in a bonded strip are considered under tension with varying the crack length and material combinations systematically. Then, the limiting solutions are provided for an edge interface crack in a bonded semi-infinite plate under arbitrary material combinations. In order to calculate the stress intensity factors accurately, exact solutions in an infinite bonded plate are also considered to produce proportional singular stress fields in the analysis of FEM by superposing specific tensile and shear stresses at infinity. The details of this new numerical solution are described with clarifying the effect of the element size on the stress intensity factor. It is found that for the edge interface crack the normalized stress intensity factors are not always finite depending upon Dunders' parameters. This behavior can be explained from the condition of the singular stress at the end of bonded strip. Convenient formulas are also given by fitting the computed results. (C) 2012 Elsevier Ltd. All rights reserved.

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