A SPH framework for dynamic interaction between soil and rigid body system with hybrid contact method

Zhan, Ling; Peng, Chong; Zhang, Bingyin; Wu, Wei

doi:10.1002/nag.3070

Cited by 37 publications

(14 citation statements)

References 41 publications

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“…Indeed, in previous SPH modelling of large-scale landslides, the friction angle is usually taken as 30 • [30,31], equivalent to a frictional coefficient of 0.58. It is found in small-scale problems, when applying the common friction coefficient in SPH computing, satisfactory results well-corroborated by experiments can be obtained [10,11,26,28,55,74]. However, it is generally observed that large-scale landslides have run-outs much longer than expected from the usual values of friction coefficient [41][42][43], indicating that the effective friction in large sliding mass is smaller than those obtained in laboratory tests.…”

Section: Influence Of Friction Coefficient µ and Scale Effect In Large-scale Landslidesmentioning

confidence: 69%

On three-dimensional SPH modelling of large-scale landslides

Peng

et al. 2022

Can. Geotech. J.

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Lagrangian particle-based smoothed particle hydrodynamics (SPH) is increasingly widely used in landslide modelling. This paper investigates four important issues not addressed by previous studies on SPH modelling of large-scale landslides, i.e., convergence property, influence of constitutive parameters, scale effect and friction reduction, and influence of different treatments of the viscous effect. The GPU-acceleration technique is employed to achieve high-resolution three-dimensional (3D) modelling. The Baige landslide is investigated by comparing numerical results with field data, and detailed analyses on the four issues are provided. Suggestions on particle resolution, constitutive parameter, and formulations of viscous discretization are also presented for future SPH modelling of large-scale landslides.

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Section: Influence Of Friction Coefficient µ and Scale Effect In Large-scale Landslidesmentioning

confidence: 69%

On three-dimensional SPH modelling of large-scale landslides

Peng

et al. 2022

Can. Geotech. J.

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“…In the current work, this approach has been chosen for reasons of simplicity and numerical robustness. An extension to a macroscale approach, i.e., a normal distance-based contact interaction [12,52,53], is possible in a straightforward manner. In addition, also a momentum-based energy tracking method [54] was recently applied for collision modeling of fully resolved rigid bodies [55,56].…”

Section: Remark 18mentioning

confidence: 99%

An SPH framework for fluid–solid and contact interaction problems including thermo-mechanical coupling and reversible phase transitions

Fuchs

Meier

Wall

et al. 2021

Adv. Model. and Simul. in Eng. Sci.

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The present work proposes an approach for fluid–solid and contact interaction problems including thermo-mechanical coupling and reversible phase transitions. The solid field is assumed to consist of several arbitrarily-shaped, undeformable but mobile rigid bodies, that are evolved in time individually and allowed to get into mechanical contact with each other. The fluid field generally consists of multiple liquid or gas phases. All fields are spatially discretized using the method of smoothed particle hydrodynamics (SPH). This approach is especially suitable in the context of continually changing interface topologies and dynamic phase transitions without the need for additional methodological and computational effort for interface tracking as compared to mesh- or grid-based methods. Proposing a concept for the parallelization of the computational framework, in particular concerning a computationally efficient evaluation of rigid body motion, is an essential part of this work. Finally, the accuracy and robustness of the proposed framework is demonstrated by several numerical examples in two and three dimensions, involving multiple rigid bodies, two-phase flow, and reversible phase transitions, with a focus on two potential application scenarios in the fields of engineering and biomechanics: powder bed fusion additive manufacturing (PBFAM) and disintegration of food boluses in the human stomach. The efficiency of the parallel computational framework is demonstrated by a strong scaling analysis.

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“…Several friction contact methods allowing arbitrary wall friction angle were proposed for SPH simulations in the past. [44][45][46][47][48] Among them, the hybrid contact method 47,49,50 combines the convenience of point-to-point contact and the accuracy of point-to-segment contact, and is suitable for problems with arbitrary geometry. In this work, it is combined with the regularized SPH model to solve large deformation soil-structure problems.…”

Section: Introductionmentioning

confidence: 99%

Regularized SPH model for soil–structure interaction with generalized frictional boundary

Wang¹,

Wu²,

Peng

2023

Num Anal Meth Geomechanics

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This paper proposes a regularized smoothed particle hydrodynamics (SPH) scheme to solve the problems of tensile instability and stress noise in largedeformation soil-structure interaction. Particle shifting and stress regularization are combined to maintain uniform stresses and particle distributions. A generalized frictional boundary condition is presented to model soil-structure interfaces with abitrary friction coefficients. A modified particle shifting technique is developed to regularize particles near the frictional boundaries. Furthermore, GPU acceleration algorithm is adopted to improve the efficiency. The proposed scheme is compared with the conventional SPH methods using numerical examples, including the collapse of three-dimensional granular column, the collapse of the cohesive soil, and pipe penetrates into soft clay. The comparison indicates that the proposed regularized SPH model can give highly accurate results for large-deformation soil-structure interaction problems with arbitrary friction coefficient.

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A SPH framework for dynamic interaction between soil and rigid body system with hybrid contact method

Cited by 37 publications

References 41 publications

On three-dimensional SPH modelling of large-scale landslides

On three-dimensional SPH modelling of large-scale landslides

An SPH framework for fluid–solid and contact interaction problems including thermo-mechanical coupling and reversible phase transitions

Regularized SPH model for soil–structure interaction with generalized frictional boundary

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