Automatic 3-D mode I crack propagation calculations with finite elements

被引:5
作者
Dhondt, G [1 ]
机构
[1] MTU Motoren & Turbinen Union Munchen GMBH, D-80976 Munich, Germany
关键词
finite element method; crack propagation; low cycle fatigue; remeshing;
D O I
10.1002/(SICI)1097-0207(19980228)41:4<739::AID-NME309>3.0.CO;2-M
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
An algorithm is presented which allows for fully automatic linear elastic low cycle fatigue (LCF) crack propagation calculations of mode I plane cracks in large structures by means of the finite element technique. The bulk of the algorithm consists of an automatic procedure to introduce the geometry of a plane crack with an arbitrary crack front in an existing three-dimensional (3-D) mesh. Once the K-distribution for the initial crack has been calculated, the use of the superelement technique reduces the computing time for the subsequent cycles by a factor of up to 40 or more. Two industrial examples illustrate the accuracy and effectiveness of the method. (C) 1998 John Wiley & Sons, Ltd.
引用
收藏
页码:739 / 757
页数:19
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