Fundamentals of cohesive powder consolidation and flow

被引：93

作者：

Tomas, J ^{[1
]}

机构：

[1] Otto von Guericke Univ, D-39106 Magdeburg, Germany

来源：

GRANULAR MATTER | 2004年 / 6卷 / 2-3期

关键词：

particle contact mechanics; adhesion; Van der Waals force; constitutive models; powder flow properties;

D O I：

10.1007/s10035-004-0167-9

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

The fundamentals of cohesive powder consolidation and flow behaviour are explained to combine reasonably particle and continuum mechanics. The influence of elastic-plastic repulsion and, consequently, stressing pre-history dependent adhesion is demonstrated by the new model "stiff particles with soft contacts" and the contact force equilibrium. With this as the physical basis, incipient powder consolidation, yield and cohesive steady-state flow are explained. These models are used to evaluate shear cell test results as constitutive functions for computer aided apparatus design for reliable flow.

引用

页码：75 / 86

页数：12

共 23 条

[1]

[Anonymous], 1992, INTERMOLECULAR SURFA

[2]

Fracturing processes in granulates subjected to compressive stress [J].