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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 66
Edited by: B.H.V. Topping
Paper III.5

Crack Propagation by Manifold and Singular Boundary Element Method

G.X. Zhang+, Y. Sugiura+, H. Hasegawa+ and F.Q. Chen#

+River Technology Department, I.N.A. Corporation, Tokyo, Japan
#Department of Hydraulic Engineering, Tsinghua University, Beijing, China

Full Bibliographic Reference for this paper
G.X. Zhang, Y. Sugiura, H. Hasegawa, F.Q. Chen, "Crack Propagation by Manifold and Singular Boundary Element Method", in B.H.V. Topping, (Editor), "Computational Mechanics: Techniques and Developments", Civil-Comp Press, Edinburgh, UK, pp 61-68, 2000. doi:10.4203/ccp.66.3.5
A second-order manifold method has been developed and is described. By means of the manifold method and a singular boundary element method proposed by the author, the failure process of a structure can be numerically analyzed. Mohr- Coulomb's law is employed as a criterion for new crack initiation, and maximum circumferential stress theory is used as criterion for the first and mixed mode (opening-shearing and closing-shearing) propagation of existing cracks. Comparison of the computed stress intensity factor with results obtained via the collocation method demonstrates the high predictive accuracy of the present method. Examples of our present method are presented.

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