Discrete modelling of hexagonal wire meshes with a stochastically distorted contact model

This paper presents an improved discrete element model, which incorporates stochastically distorted contact mechanics, for the simulation of double-twisted hexagonal wire meshes that are commonly used in rockfall protection. First, the characteristics of such meshes are investigated by conducting qu...

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Bibliographic Details
Published in:Computers and geotechnics 2013-04, Vol.49, p.158-169
Main Authors: Thoeni, Klaus, Lambert, Cédric, Giacomini, Anna, Sloan, Scott W.
Format: Article
Language:English
Subjects:
Computer simulation
Contact
Discrete element method (DEM)
Distortion
Double-twisted hexagonal mesh
Dynamic response
Finite element method
Mathematical models
Probability theory
Randomness
Remote interaction
Rockfall protection
Wire mesh
Wire structure
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Summary:This paper presents an improved discrete element model, which incorporates stochastically distorted contact mechanics, for the simulation of double-twisted hexagonal wire meshes that are commonly used in rockfall protection. First, the characteristics of such meshes are investigated by conducting quasi-static and dynamic experimental tests. Second, the discrete model for the simulation of such meshes is presented. A stochastically distorted contact model is introduced to account for distortions of the wires and hexagons, allowing a more realistic representation of the mechanical response of the mesh from the deformation point of view and the force point of view. Quasi-static tensile tests of a plane net sheet, subjected to a constant strain rate, are used to study the effect of the stochastically distorted contact formulation and to calibrate the numerical model. Finally, the dynamic response of an impacting block on a horizontal mesh sheet is used to compare the numerical predictions against experimental results in order to validate the proposed approach.
ISSN:0266-352X
1873-7633
DOI:10.1016/j.compgeo.2012.10.014