3D-SPH-DEM coupling simulation for the large deformation failure process of check dams under debris flow impact incorporating the nonlinear collision-constraint bond model
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引用次数: 0
Abstract
Computational analysis of debris flow dynamics and its impact on structures, including check dams, is a long-standing problem for hazard prevention. It's a complex issue involving two-phase interaction between fluid mass and solid structure, as well as the large deformation failure of check dams, therefore, three-dimensional simulation of this process remains a scientific challenge. In this paper, a 3D-SPH-DEM coupling model is proposed by incorporating a nonlinear collision-constraint bond model. The model first builds upon our previous 3D-SPH model based on Herschel-Bulkley-Papanastasiou (HBP) rheology to describe the fluid behavior within the debris flow process. Secondly, a constituent particle-based DEM block representation method is integrated to model check dams, and the fluid-solid interaction force between debris flow particles and DEM blocks is obtained. Additionally, a nonlinear collision-constraint bond model with a predefined coefficient α is incorporated to simulate the solid interaction between DEM blocks and characterize the different strength levels of check dams. To verify the proposed model, a well-documented pier cubes failure experiment in a previous study is used, wherein the simulation results well reproduce the failure process as observed in the experiment from the quantitative perspective. The 2010 Yohutagawa debris flow event is selected as the case study. Results show that the proposed model well simulates the fluid-solid interaction phenomenon and can effectively explore the large deformation failure process of check dams under debris flow impact.
期刊介绍:
This journal is specifically dedicated to the dissemination of the latest developments of new engineering analysis techniques using boundary elements and other mesh reduction methods.
Boundary element (BEM) and mesh reduction methods (MRM) are very active areas of research with the techniques being applied to solve increasingly complex problems. The journal stresses the importance of these applications as well as their computational aspects, reliability and robustness.
The main criteria for publication will be the originality of the work being reported, its potential usefulness and applications of the methods to new fields.
In addition to regular issues, the journal publishes a series of special issues dealing with specific areas of current research.
The journal has, for many years, provided a channel of communication between academics and industrial researchers working in mesh reduction methods
Fields Covered:
• Boundary Element Methods (BEM)
• Mesh Reduction Methods (MRM)
• Meshless Methods
• Integral Equations
• Applications of BEM/MRM in Engineering
• Numerical Methods related to BEM/MRM
• Computational Techniques
• Combination of Different Methods
• Advanced Formulations.