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http://dx.doi.org/10.7734/COSEIK.2020.33.3.171

MPI-OpenMP Hybrid Parallelization for Multibody Peridynamic Simulations  

Lee, Seungwoo (Moasys Corporation)
Ha, Youn Doh (Department of Naval Architecture and Ocean Engineering, Kunsan National Univ.)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.33, no.3, 2020 , pp. 171-178 More about this Journal
Abstract
In this study, we develop MPI-OpenMP hybrid parallelization for multibody peridynamic simulations. Peridynamics is suitable for analyzing complicated dynamic fractures and various discontinuities. However, compared with a conventional finite element method, nonlocal interactions in peridynamics cost more time and memory. In multibody peridynamic analysis, the costs increase due to the additional interactions that occur when computing the nonlocal contact and ghost interlayer models between adjacent bodies. The costs become excessive when further refinement and smaller time steps are required in cases of high-velocity impact fracturing or similar instances. Thus, high computational efficiency and performance can be achieved by parallelization and optimization of multibody peridynamic simulations. The analytical code is developed using an Intel Fortran MPI compiler and OpenMP in NURION of the KISTI HPC center and parallelized through MPI-OpenMP hybrid parallelization. Further parallelization is conducted by hybridizing with OpenMP threads in each MPI process. We also try to minimize communication operations by model-based decomposition of MPI processes. The numerical results for the impact fracturing of multiple bodies show that the computing performance improves significantly with MPI-OpenMP hybrid parallelization.
Keywords
peridynamics; MPI-OpenMP hybrid parallelization; high performance computing (HPC); ghost interlayer model; nonlocal contact model;
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Times Cited By KSCI : 2  (Citation Analysis)
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1 Bobaru, F., Ha, Y.D., Hu, W. (2012) Damage Progression from Impact in Multilayered Glass Modeled with Peridynamics, Cent. Eur. J. Eng., 2(4), pp.551-561.
2 Ha, Y.D. (2019) Dynamic Fracture Analysis for 2D Multilayered Glass Structures Considering Interlayer Effects, J. Mech. Sci. Tech., 33(8), pp.3641-3648.   DOI
3 Ha, Y.D. (2020) An Extended Ghost Interlayer Model in Peridynamic Theory for High-Velocity Impact Fracture of Laminated Glass Structures, Under Review.
4 Ha, Y.D., Ahn, T.S. (2018) Peridynamic Impact Fracture Analysis of Multilayered Glass with Nonlocal Ghost Interlayer Model, J. Comput. Strcut. Eng. Inst. Korea, 31(6), pp.373-380.   DOI
5 Ha, Y.D., Bobaru, F. (2010) Studies of Dynamic Crack Propagation and Crack Branching with Peridynamics, Int. J. Fract., 162(1-2), pp.229-244.   DOI
6 Ha, Y.D., Cho, S. (2011) Dynamic Brittle Fracture Captured with Peridynamics: Crack Branching Angle & Crack Propagation Speed, J. Comput. Strcut. Eng. Inst. Korea, 24(6), pp.637-643.
7 Ha, Y.D., Lee, J., Hong, J.W. (2015) Fracturing Patterns of Rock-like Materials in Compression Captured with Peridynamics, Eng. Fract. Mech., 144, pp.176-193.   DOI
8 Hu, W., Ha, Y.D., Bobaru, F. (2012) Peridynamic Model for Dynamic Fracture in Unidirectional Fiber-Reinforced Composites, Comput. Methods Appl. Mech. Eng., 217, pp.247-261.   DOI
9 Silling, S.A. (2000) Reformulation of Elasticity Theory for Discontinuities and Long-Range Forces, J. Mech. & Phys. Solids, 48, pp.175-209.   DOI
10 Silling, S., Askari, E. (2005) A Meshfree Method based on the Peridynamic Model of Solid Mechanics. Comput. Struct., 83(17-18), pp.1526-1535.   DOI
11 Silling, S.A., Epton, M., Weckner, O., Xu, J., Askari, E. (2007) Peridynamics States and Constitutive Modeling, J. Elasticity., 88, pp.151-184.   DOI