Abstract
It is well established that the principal stress rotation (PSR) can lead to plastic deformations in soil, and soil is subjected to two dimensional shears in many geotechnical applications, which lead to two dimensional principal stress rotations. This paper aims to study impacts of two dimensional PSRs on soil behavior by using the DEM and experimentation, in which glass beads are used. In the two directional simple shear apparatus, the first shear is exerted on samples along one direction, followed by the second shear at varying angles to the first shear. The experimental results indicate that the angle between the first and second shears have a great impact on the sample strength. The DEM results are in very good agreement with the experimental results on the development of both shear stress and volumetric change. Further, lateral normal stresses in the simple shear in the DEM study can be obtained, enabling the computation of principal stresses under two dimensional shears. Fabric developments of samples can also be studied in the DEM simulation.
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Acknowledgements
This work is supported by NSFC (Project code 11872219), Zhejiang Natural Science Foundation (project code LY18E090006) and Ningbo Natural Science Program (project code 2018A610351). These supports are appreciated.
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Yang, Y., Zhang, M., Zhang, H., Yu, HS. (2021). Experimental and DEM Study of Two Dimensional Simple Shear. In: Barla, M., Di Donna, A., Sterpi, D. (eds) Challenges and Innovations in Geomechanics. IACMAG 2021. Lecture Notes in Civil Engineering, vol 125. Springer, Cham. https://doi.org/10.1007/978-3-030-64514-4_26
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DOI: https://doi.org/10.1007/978-3-030-64514-4_26
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