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Improved double-point material point method for dynamic geotechnical problems
Citation Link: https://doi.org/10.15480/882.13395
Publikationstyp
Conference Paper
Date Issued
2024-07-02
Sprache
English
TORE-DOI
Volume
2647
Issue
8
Article Number
082013
Citation
12th International Conference on Structural Dynamics, EURODYN 2023
Contribution to Conference
Publisher DOI
Scopus ID
Publisher
IOP
The Material Point method is a suitable numerical method to simulate large deformations often occurring in geotechnical engineering. The Double-Point MPM (2P-MPM) extends the simulations for water-saturated materials. In the present work, a coupled dynamic formulation is used to account for coupled wave propagation in porous media in addition to large deformations. The computational cost of 2P-MPM is expensive because information between material points and grid nodes must be approximated at each time step. In conventional 2P-MPM formulations, linear shape functions are used for this approximation, leading to well-known grid crossing and loss of contact problems. We use the moving least square approximation for the 2P-MPM to handle these problems better. In addition, a parallelization approach is shown to improve the computation time, especially for large boundary value problems. The developed methods can be combined with non-saturated materials, such as fluids and dry soil, to simulate complex geotechnical issues. The performed computations of wave propagation and large deformations using the proposed methods show improved convergence behavior and increased efficiency.
DDC Class
530: Physics
624.15: Geotechnical Engineering
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Chmelnizkij_2024_J._Phys.__Conf._Ser._2647_082013.pdf
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Main Article
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2.54 MB
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