Fortran coarray/MPIMulti-scale CAFE for fracture in heterogeneous materials

A. Shterenlikht*, L. Margetts, L. Cebamanos

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

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Abstract

All real materials are heterogeneous, e.g. polycrystalline metal alloys, reinforced concrete, carbon fibre reinforced polymer (CFRP), wood, nuclear graphite or bone. Modelling of such materials involves concurrent simulation of multiple interacting and competing physical processes, acting at different length and time scales, e.g. dislocation flow, ply debonding or separation of atomic layers. In this work we demonstrate a multi-scale fracture framework where cellular automata (CA) represents material evolution, deformation and fracture at micro- or nano-scales and finite elements (FE) are used at structural scales. Fortran coarrays offer simple and intuitive data structures for 3D CA modelling of material microstructures. Design of a coarray cellular automata microstructure evolution library CGPACK is described. Simulations of solidification, recrystallisation and grain coarsening, and fracture can be performed at arbitrary length and time scales with CGPACK. We show how coarrays can be used together with an MPI FE library to create a two-way concurrent hierarchical and scalable multi-scale CAFE deformation and fracture framework. Strong scaling of a hybrid ParaFEM/CGPACK MPI/coarray multi-scale framework was measured on Cray for a simulation of a fracture of a steel round bar under tension. The program scales up to 7,000 cores.

Original languageEnglish
Title of host publicationProceedings of the Fifth International Conference on Parallel, Distributed, Grid and Cloud Computing for Engineering
EditorsP Iványi, B H V Topping, G Várady
PublisherCivil-Comp Press
ISBN (Print)9781905088669
DOIs
Publication statusPublished - 30 May 2017

Publication series

NameCivil-Comp Proceedings
PublisherCivil-Comp Press
Volume111
ISSN (Print)1759-3433

Keywords

  • Fortran coarrays
  • Fracture mechanics
  • Heterogeneous materials
  • MPI
  • Multi-scale
  • Profiling
  • Scaling

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