On the modeling of confined buckling of force chains

摘要: Buckling of force chains, laterally confined by weak network particles, has long been held as the underpinning mechanism for key instabilities arising in dense, cohesionless granular assemblies, e.g. shear banding and slip-stick phenomena. Despite demonstrated significance this from numerous experimental discrete element studies, there is yet no model buckling chains. We present herein first structural mechanical mechanism. Good agreement found between predictions chain events simulations. A complete parametric analysis undertaken to determine effect various particle-scale properties on stability failure Transparency across scales achieved, mechanisms microscopic mesoscopic domains, which drive well-known macroscopic trends biaxial compression tests, are elucidated.