Internal friction angle model of particles

Jiri Zegzulka,Jiri Rozbroj,Álvaro Ramírez-Gómez,Daniel Gelnar,Jan Necas,Lucie Jezerska

doi:10.1038/s41598-022-05891-8

Jiri Zegzulka, Jiri Rozbroj + Show 4 more

Open Access

https://doi.org/10.1038/s41598-022-05891-8

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Abstract

Currently, pressure from industry to streamline processes by creating their simulation models, and thus to gradual digitization is increasing. The essence of representative simulation models of bulk materials is to understand the principles and laws of the real behavior of particles. The aim of this study is therefore to find and quantify the possibilities and principles of how particles can change their position relative to other particles. The possibilities of particle displacements were expressed using their specific trajectories and work ratios, or internal friction angle values. This created a new comprehensive model of the internal friction angle of particles independent of particle size. It enables the interpretation of the determined values of the angles of internal friction of particles and its application in the field of simulations of mass and process models. The model can be used to determine the basic composition of particles in volume and the dominant ways of their mutual displacements.

Highlights

Pressure from industry to streamline processes by creating their simulation models, and to gradual digitization is increasing
In the field of particulate material mechanics, it may seem that the general question of particle displacement is solved by the assumption of quasi-linear motion based on infinitesimal or at least sufficiently small particles compared to the space in which they move
This paper describes a new perspective on the internal friction angle of particles

Summary

Introduction

Pressure from industry to streamline processes by creating their simulation models, and to gradual digitization is increasing. The possibilities of particle displacements were expressed using their specific trajectories and work ratios, or internal friction angle values This created a new comprehensive model of the internal friction angle of particles independent of particle size. It enables the interpretation of the determined values of the angles of internal friction of particles and its application in the field of simulations of mass and process models. Lots of works have focused on efficiently determining the optimal particle shape for simulation p rocesses[9,10] These process methods are validated according to the volumetric behaviors of the materials. To evaluate the complex material properties based on internal friction, the effect of particle shape on internal friction can be included

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