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Automatic Mixed-Mode Crack Propagation based on a Combined Hexahedral-Tetrahedral Approach

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Abstract:

In the present paper, a new method for inserting cracks with out-of-plane features is presented. Starting point is an arbitrary reference structure and a crack of any shape. The final cracked structure is represented by hexahedral elements in the crack-front region and tetrahedral elements in the remaining structure domain. The tetrahedron is employed to take advantage of the versatile meshing capabilities and the collapsed quarter-point hexahedron gives good crack-tip behaviour. Stress intensity factors are calculated from the asymptotic stress field, retrieved from the integration points near the crack-tip.

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Periodical:

Key Engineering Materials (Volumes 348-349)

Pages:

581-584

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.348-349.581

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Online since:

September 2007

Authors:

Daniel Bremberg, Guido Dhondt

Keywords:

Crack Growth, Finite Element Model (FEM), Mixed-Mode, Stress Intensity Factor (SIF)

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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References

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