A phenomenological law for complex granular materials from Mohr-Coulomb theory

Manipulating powders still entails some clumsy and risky operations even now in the middle of fourth industrial revolution. This is because there a lack well-understood theory about granular matter due to its ravelled complexity. However, second most handled material by man after water thus ubiquitous daily life industry only water. Since eighteenth century, mechanical chemical engineers have been striving manage many difficulties grain handling, which are related flow problems. Many continuum models for dense proposed. Herein, we investigated Mohr–Coulomb failure analysis as it has cornerstone stress distribution studies applications decades. research gathers over 130 materials from several sectors, varied cement flour, including raw materials, food, pharmaceuticals, cosmetics. A phenomenological law derived yield locus governed exclusively one dimensionless number adhesive interactions found. Surprisingly, contrast common perception, quasi-static regime actually independent friction, packing fraction any other grains/bulk intrinsic properties. The simplicity accuracy model remarkable light complex constitutive properties matter.