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

作者：Thoeni Klaus^*; Lambert Cedric; Giacomini Anna; Sloan Scott W

来源：Computers and Geotechnics, 2013, 49: 158-169.

DOI：10.1016/j.compgeo.2012.10.014

• Discrete element method (DEM)
• Remote interaction
• Double-twisted hexagonal mesh
• Wire structure
• Rockfall protection
• Dynamic response

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.

• 出版日期2013-4