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NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Engineering > Bulletin > Reports of the Faculty of Engineering, Nagasaki University > No.19 >

特異性を有する問題における特殊要素剛性行列の収束判定法 (2次元き裂)


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Title: 特異性を有する問題における特殊要素剛性行列の収束判定法 (2次元き裂)
Other Titles: On the Convergence of the Super-Element Stiffness Matrix for Problems with Singularity (Two-dimensional cracks)
Authors: 河角, 省治
Authors (alternative): Kawakado, Shoji
Issue Date: Aug-1982
Publisher: 長崎大学工学部 / Faculty of Engineering, Nagasaki University
Citation: 長崎大学工学部研究報告, (19), pp.75-81; 1982
Abstract: There is a singularity at the tip of crack, the edge of notch, etc. In this case, it is need to use a special finite element to obtain stress distribution at exactly by the finite element technique. Many authors have discussed the applicability of stress intensity factors for plane cracks. Tong has adopted the hybrid-element concept and the complex variable technique for constructing a special super-element to be joining with conventional finite element for the analysis of elastic stress intensity factors for plane cracks. The super-element stiffness matrix has been developed for the crack-tip region based on the hybrid model, which is assuming the stress and displacement by use of analytical values near the crack-tip. In this analysis, some complex polynomials are employed as the interpolating function of super-element formulation, so that the convergence of the super-element stiffness matrix cannot be obtained accurately. Therefore the eigen-values or the norm of the stiffness matrix are used for decision of the convergence, and some results of the stress intensity factors for central crack in the rectangular plates are shown in this paper.
URI: http://hdl.handle.net/10069/24504
ISSN: 02860902
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:No.19

Citable URI : http://hdl.handle.net/10069/24504

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