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Dynamic failure simulation of quasi‐brittle material in dual particle dynamics
Author(s) -
Sanchez J.J.,
Randles P.W.
Publication year - 2012
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.4327
Subject(s) - spall , discretization , moving least squares , mechanics , brittleness , material failure theory , interpolation (computer graphics) , structural engineering , boundary value problem , materials science , mathematics , engineering , physics , mathematical analysis , classical mechanics , finite element method , composite material , motion (physics)
SUMMARY The feasibility of simulating dynamic fracture in quasi‐brittle material using a dual particle computational method with a smeared‐crack representation of material failure is explored. The computational approach utilized is dual particle dynamics, which incorporates a moving least squares interpolation of field variables between two sets of particles that discretize the spatial domain, and a Lagrangian description of the moving least squares weight function. Material failure is represented by an inelastic continuum strain contribution obtained from smearing the effect of a cohesive failure model over a discrete volume of material. A three‐dimensional simulation of the initiation and development of a dynamic mode I failure is performed for the case of approximate plane wave propagation. Post failure wave interaction with the resulting global failure surface replicates the behavior of a stress‐free boundary condition. The computational material failure approach is applied to problems of spalling in split Hopkinson pressure bar tests. Experimental failure trends are reproduced successfully.Copyright © 2012 John Wiley & Sons, Ltd.