Fracture mechanics of the three-dimensional crack front: vertex singularity versus out of plain constraint descriptions

被引：13

作者：

Hutar, Pavel ^{[1
]}

Sevcik, Martin ^{[1
,2
]}

Nahlik, Lubos ^{[1
,2
]}

Zouhar, Michal ^{[1
,2
]}

Seitl, Stanislav ^{[1
]}

Knesl, Zdenek ^{[1
]}

Fernandez-Canteli, Alfonso ^{[3
]}

机构：

[1] Acad Sci Czech Republic, Inst Phys Mat, Zizkova 22, Brno 61662, Czech Republic

[2] Brno Univ Technol, Fac Mech Engn, Brno 61669, Czech Republic

[3] Univ Oviedo, Dept Construct & Mfg Engn, Gijon 33203, Spain

来源：

FATIGUE 2010 | 2010年 / 2卷 / 01期

关键词：

in-plain constraint; out of plain constraint; vertex-singularity; linear elastic fracture mechanics; STRESS; PROPAGATION; PLATES;

D O I：

10.1016/j.proeng.2010.03.225

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The effect of a free surface on stress distribution along the three-dimensional crack front is discussed. Generalized stress intensity factor methodology and out-of-plane constraint based procedure are used for a reliable estimation of the stress state in front of the crack tip. The two present methodologies are discussed and compared. The out-of plane, in-plane constraint parameters and generalized stress intensity factor were estimated. It is shown significant changes of the singularity exponents and fracture parameters values close to the free surface. Therefore, conventional methodologies can lead to inaccurate description of the stress state and cannot be used for reliable description of fatigue crack propagation in this area. (C) 2010 Published by Elsevier Ltd.

引用

页码：2095 / 2102

页数：8

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