Calculation of transient dynamic stress intensity factors at bimaterial interface cracks using a SBFEM-based frequency-domain approach

被引：0
|
作者：
Z.J.YANG [1 ]
A.J.DEEKS [2 ]
机构：
[1] College of Civil Engineering and Architecture,Zhejiang University
[2] School of Civil and Resource Engineering,University of Western Australia
来源：
Science China(Physics,Mechanics & Astronomy) | 2008年 / 05期
基金：
澳大利亚研究理事会;
关键词：
scaled boundary finite element method; bimaterial interface crack; frequency domain; dynamic stress intensity factors; fast Fourier transform;
D O I：
暂无
中图分类号：
O357 [粘性流体力学];
学科分类号：
080103 ; 080704 ;
摘要：
A frequency-domain approach based on the semi-analytical scaled boundary finite element method(SBFEM) was developed to calculate dynamic stress intensity factors(DSIFs) at bimaterial interface cracks subjected to transient loading.Be-cause the stress solutions of the SBFEM in the frequency domain are analytical in the radial direction,and the complex stress singularity at the bimaterial interface crack tip is explicitly represented in the stress solutions,the mixed-mode DSIFs were calculated directly by definition.The complex frequency-response functions of DSIFs were then used by the fast Fourier transform(FFT) and the inverse FFT to calculate time histories of DSIFs.A benchmark example was modelled.Good re-sults were obtained by modelling the example with a small number of degrees of freedom due to the semi-analytical nature of the SBFEM.
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页码：519 / 531
页数：13
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