Development of Soft Particle Code (SPARC)
Chien-Hsun Chen
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Chien-Hsun Chen, Development of Soft Particle Code (SPARC) (2015), Logos Verlag, Berlin, ISBN: 9783832594626
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Beschreibung / Abstract
This work aims at developing a numerical simulation method, Soft PARticle Code (SPARC). The term textit{soft emphasizes that no boundaries between particles are defined and every particle possesses a support consisting of a set of adjacent particles. The polynomial interpolation/approximation method is utilized for the evaluation of spatial derivatives using the information carried by particles in supports. The system of equations consisting of spatial derivatives is solved using an iterative nonlinear solver and the computation of the Jacobian matrix is parallelized. The simulations of laboratory tests have been carried out to show the applications and limitations of the current version of SPARC. In addition to the simulations, laboratory (zig-zag) model tests using fine sand were carried out, in which the cyclic tilt of a retaining wall induces a peculiar motion in the backfill (sand), with closed trajectories (eddies).
Inhaltsverzeichnis
- BEGINN
- 1 Introduction
- 1.1 Numerical simulation and approximation methods
- 1.2 Goal and outline
- 2 Soft Particle Code (SPARC)
- 2.1 Introduction
- 2.2 Discretization of continuum
- 2.3 Neighbor search
- 2.4 Spatial derivatives
- 2.5 Constitutive model
- 2.6 System of equations
- 2.7 Numerical Solver
- 2.8 Pressure boundary condition
- 2.9 Parallelization
- 3 Parameter Study
- 3.1 Benchmark
- 3.2 Numerical solvers
- 3.3 Support size
- 3.4 Irregular array of particles
- 4 Simulation of Conventional Laboratory Tests
- 4.1 Oedometer test
- 4.2 Triaxial test
- 5 Validation
- 5.1 Oedometer test
- 5.2 Triaxial test
- 5.3 Simulation with FE method
- 6 Simulation of the †˜Zig-Zag†™-Tests
- 6.1 Boundary conditions
- 6.2 Simulation set-ups
- 6.3 Results
- 6.4 Summary
- 7 Summary, Limitations and Outlook
- 7.1 Summary
- 7.2 Limitations
- 7.3 Outlook