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Dynamic non-local damage analysis using an octree pattern-based massively parallel explicit solver
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DOI：10.1016/j.cma.2022.115598.png)
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Abstract
En 中文
This paper presents the development of a massively parallel explicit solver based on the central difference method (CDM) for the dynamic analysis of damage processes. In this context, the material degradation is incorporated using an integral-type non-local isotropic damage model. A fully automatic preprocessing is enabled by following the octree-based mesh generation paradigm. To handle neighbouring elements with different sizes and to avoid hanging nodes in the generated mesh, polyhedral elements are implemented within the framework of the scaled boundary finite element method (SBFEM). A pre-computation approach is advocated to develop a highly efficient solver, where the limited number of master cells in a balanced octree grid are exploited. The parallelisation is carried out using a mesh-partitioning technique and message-passing-interface (MPI) directives, which is highly complementary to the use in high-performance computing (HPC) facilities. In order to showcase the performance of the proposed solver, a problem of practical interest is selected, featuring the analysis of an XCT image-based model of concrete containing about 1 billion voxels. The simulated results have been obtained within minutes by exploiting the computational power of approximately 12k cores.(c) 2022 Elsevier B.V. All rights reserved.
Keywords:
Explicit dynamics
Massively parallel computing
Non-local damage
Octree mesh
XCT image-based analysis
Scaled boundary finite element method
Journal
IF:
7.3
Papers:
1.3W
Citations:
5.6W
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