Micromechanical analysis of cohesive granular materials using the discrete element method with an adhesive elasto-plastic contact model

Particles, contacts, bulk-behavior

“…The papers in this thematic issue on particles, contacts and bulk behaviour are sorted according to the theme from particles (simple, spherical [1,2] to complex, non-spherical [3,4]), via their contacts (from simple, linear to non-linear, frictional, elasto-plastic, cohesive [2]) towards rapid impact [5,6], and the bulk behaviour [7][8][9][10]. For particles and their contacts, the state-of-the-art in constitutive modelling of elastic, elastic-adhesion, elastic-dissipative, plastic-adhesion and plastic-dissipative contact deformation response of a single particle is discussed in most papers in this special issue [1][2][3][4][5][6][7][8][9][10]; furthermore, on all levels from particles, their contacts and on the macroscopic bulk-flow level, models are shown but also experimentally validated.…”

“…For particles and their contacts, the state-of-the-art in constitutive modelling of elastic, elastic-adhesion, elastic-dissipative, plastic-adhesion and plastic-dissipative contact deformation response of a single particle is discussed in most papers in this special issue [1][2][3][4][5][6][7][8][9][10]; furthermore, on all levels from particles, their contacts and on the macroscopic bulk-flow level, models are shown but also experimentally validated.…”

“…The consequences of elastic-dissipative, elastic-plastic, frictional unloading and reloading paths of normal and tangential forces, rolling and torsional moments are discussed, and novel test techniques on single particle contact level are shown [1,3,6,7,9].…”

“…By modelling the particle contact behaviour by suitable micro-macro interaction rules, constitutive equations can be derived [6][7][8][9][10] to describe the pre-consolidation dependent, mechanical behaviour of ultrafine cohesive powders and to simulate the dynamics of packed particle beds in powder processing, i.e. at agglomeration, disintegration, size reduction, powder storage and flow.…”

Linking attractive interactions and confinement to the rheological response of suspended particles close to jamming

“…At the same time, the emergence of yield-stress behaviour during the transportation and storage of nominally dry granular materials remains a related engineering challenge across manufacturing and processing industries [12,13]. In such scenarios, attractive interactions may arise between particles as a result of electrostatic interactions or liquid bridging due to environmental moisture, for example.…”