Statics and kinematics of granular materials
This book outlines the basic science underlying the prediction of stress and velocity distributions in granular materials. It takes the form of a textbook suitable for post-graduate courses, research workers and for use in design offices. The nature of a rigid-plastic material is discussed and a comparison is made between the Coulomb and conical (extended von Mises) models. The methods of measuring material properties are described and an interpretation of the experimental results is considered in the context of the Critical State Theory. The early chapters consider the traditional methods for predicting the forces on planar retaining walls and the walls of bunkers and hoppers. These approximate methods are described and their accuracy discussed. Later chapters give details of the exact methods of stress and velocity prediction, covering both the radial stress and velocity fields and the method of characteristics. The analysis of stress and velocity discontinuities is also considered as is the prediction of the mass/core flow transition. The final chapter covers the discharge rate of materials through orifices, dealing with both the correlations of experimental results and theoretical prediction. The influence of interstitial pressure gradients is also considered leading to an analysis of the flow of fine materials and the effects of air-augmentation. The book ends with an assessment of Jenike's method for predicting the circumstances under which cohesive arching prevents flow. The book will be an invaluable text for all those working with or doing research into granular materials. Exercises and solutions are provided which will be particularly useful for the student
xv, 352 pages : illustrations ; 24 cm
9780521404358, 0521404355
24870897
Machine derived contents note: 1. Introduction
2. The analysis of stress and strain rate
3. The ideal Coulomb material
4. Coulomb's method of wedges
5. The method of differential slices
6. Determination of physical properties
7. Exact stress analysis
8. Velocity distributions
9. The conical yield function
10. The prediction of mass flow rate
Problems
Appendices
Index