XFEM Simulation of Soil Crack Evolution Process Considering the Stress Concentration and Redistribution at the Crack Tip
Publication: International Journal of Geomechanics
Volume 22, Issue 9
Abstract
Cracks are one of the major characteristics of soil structure failure. Successfully performed numerical simulation of the soil crack evolution process is conducive to the prediction of potential dangers. In recent years, crack evolution simulation has been greatly facilitated in the field of fracture mechanics by the development of the extended finite-element method (XFEM). However, it is rarely used to simulate crack evolution in earth structures, because in most cases soil cannot be regarded as a quasi-brittle material. Based on the characteristics of stress concentration and redistribution at the tip of a soil crack revealed by numerical tests, this paper proposes a discriminating method for crack propagation that can reflect the influence of the stress field at the soil crack tip on the crack propagation direction, which is then coded to an XFEM program. Compared with existing methods, this new method is found to be more accurate and effective.
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Acknowledgments
This work was supported by the National Key Research and Development Program of China (Grant No. 2021YFC3090101) and the National Natural Science Foundation of China (Grant Nos. U1965206 and 51979143).
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Published In
International Journal of Geomechanics
Volume 22 • Issue 9 • September 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Sep 15, 2021
Accepted: Apr 9, 2022
Published online: Jul 1, 2022
Published in print: Sep 1, 2022
Discussion open until: Dec 1, 2022
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