Parallelization of lattice modelling for estimation of fracture process zone extent in cementitious composites

Authors: P. Frantík, V. Veselý, Z. Keršner

Abstract: 
This paper is focused on the verification and validation of the developing technique for estimation of the extent (the size and shape) of the fracture process zone (FPZ) in quasi-brittle silicate-based specimens/ structures during failure process (termed the ReFraPro – Reconstruction of Fracture Process – technique). Most experimental data published in the literature are incomplete for its sound validation; therefore, numerical simulations by means of physical discretization of continuum are used for supplementing the verification of the technique. A discrete spring network/lattice particle-type model formulated as a nonlinear dynamical system is utilized. Parallelized implementation within the CUDA environment helps to decrease the computational cost of the simulations to an admissible level. The conducted analysis demonstrates satisfactory agreement of the size and shape of the FPZ reconstructed by the ReFraPro technique with both the data of the performed simulations and selected experimental data from literature.

Keywords:
Quasi-brittle fracture
Fracture process zone
Energy dissipation
Physical discretization
Nonlinear dynamical system
CUDA implementation

Published in: Advances Engineering Software (Volume 60-61, june-july, 2013)

Publisher: Elsevier

ISSN Information: 0965-9978

Parallelization of lattice modelling for estimation of fracture process zone extent in cementitious composites

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