Titlebook: ;

Exuberance

Contact Mechanics,ment behaviour depends on the material properties of the particles, the sizes of the two particles in contact and the surface conditions. In this chapter we consider contact force models that are based on theoretical contact mechanics. Equations are derived for both the normal and tangential contact

议程

Other Contact Force Models,ire load reversal points to be stored in memory. Consequently, many researchers elect to use simpler contact force models in order to reduce computer time requirements. A selection of the most common simpler contact force models are described in this chapter, including linear springs and non-linear

sed-rate

Particle Impact,ision may appear to be a very simple problem but, in fact, it is a very complex event. This is due to the short duration and the high localised stresses generated that, in most cases, result in both frictional and plastic dissipation. In addition, if rigid body sliding does not occur throughout the

胆小鬼

Agglomerate Impacts,ical and allied industries. These particulate materials are frequently in the form of powders which are, themselves, agglomerations of much smaller sized primary particles. A common problem inherent in the handling of powders is the degradation resulting from attrition and/or fragmentation of the ag

Itinerant

Fluidised Beds,to behave like a solid, a liquid or a gas, depending on the magnitude of the applied superficial gas velocity. One of the attractions of DEM is that it can model all three different phases. To account for the interstitial gas, a combined Lagrangian-Eulerian approach is used by combining the use of D

心胸狭窄

Quasi-static Deformation, problems, as illustrated in previous chapters, the original BALL and TRUBAL codes were intended to be used to examine quasi-static deformation in the context of soil mechanics. Prior to the introduction of DEM, analyses were restricted to regular arrays of equal-sizeed spheres and an example is pro

NAUT

,Sahel — naturwissenschaftliche Berührungen, they may appear to behave like a solid, a liquid or a gas depending on such factors as the phase volume of the particles and the flow characteristics of the superficial gas. Experimental research has normally been limited to measurements at the macroscale and attempts to provide a rational explanat

不如屎壳郎

Methoden der sicherheitspolitischen Analysee-dimensional DEM simulations are provided, dealing with particle kinematics, contact forces, timestep and damping. The chapter then considers various characteristics of compact particle systems with enduring contacts and provides derivations of the coordination number, fabric tensor, stress tensor

哥哥喷涌而出

https://doi.org/10.1007/978-3-531-19951-1ment behaviour depends on the material properties of the particles, the sizes of the two particles in contact and the surface conditions. In this chapter we consider contact force models that are based on theoretical contact mechanics. Equations are derived for both the normal and tangential contact

reflection

https://doi.org/10.1007/978-3-8349-6074-0ire load reversal points to be stored in memory. Consequently, many researchers elect to use simpler contact force models in order to reduce computer time requirements. A selection of the most common simpler contact force models are described in this chapter, including linear springs and non-linear