In this paper, a DEM (Discrete Element Method) model is presented and a series of computer experiments is analyzed and compared to experimental validations. Also, the simulations are compared to experimental results. The model uses a 3 parameter contact force to calculate impact between particles and other object such as vanes. The components of the contact forces are typically modeled in terms...

In probing adhesion and cell mechanics by atomic force microscopy (AFM), the mechanical properties of the membrane have an important if neglected role. Here we theoretically model the contact of an AFM tip with a cell membrane, where direct motivation and data are derived from a prototypical ligand-receptor adhesion experiment. An AFM tip is functionalized with a prototypical ligand, SIRPalpha,...

Problems implementation using the finite element method (FEM) is primarily associated with proper selection of approximation order shape functions, material behavior models, coupling nature analysis and techniques choice. The choice numerical solution parameters affects computational procedures. paper solves problem FEM its realization methods in to achieve a reasonable balance between counting...

rails fracture by the growth of fatigue crack or critical crack is one of the prevalent defects in railway. the rail fracture, failure and stress analysis should be studied in order to prevention of rail fracture. in this paper, new formulation of contact stress for two rolling bodies is presented, where the results are closed to the hertz stress formulation. moreover, stress analysis is done b...

Abstract Contact geometry allows us to describe some thermodynamic and dissipative systems. In this paper we introduce a new geometric structure in order time-dependent contact systems: cocontact manifolds. Within setting develop the Hamiltonian Lagrangian formalisms, both regular singular cases. case, present constraint algorithm aiming find submanifold where solutions exist. As particular cas...

We present a complete theory of higher-order autonomous contact mechanics, which allows us to describe dynamical systems with dissipation. The essential tools for the are extended tangent bundles, TkQ×R, whose geometric structures previously introduced in order state Lagrangian and Hamiltonian formalisms these kinds systems, including their variational formulation. principle, forms, equations o...