Abstract & Overview
The abundance of granular materials and powders that are being used in several fields, along with their broad applications, requires a comprehensive understanding of both their macro- and micro-mechanical behavior. The fabric and structural properties, or the inter-particle properties, such as the angle of repose, do affect the behavior of granular materials. This comprehensive review indicates that the angle of repose of granular material is an essential parameter to understand the micro-behavior of the granular material and, then, to relate it with the macro-behavior. Therefore, this extensive review was prepared about the repose angle theory, its definitions, method of measurements, appropriate applications and the influencing factors. Description: The static (a) and dynamic (b) angles of repose are inherent parameters for powders and depend on the items shown in Venn diagram. • Depending upon the method of measurement, the angle of repose value varies appreciably. • The selection of an appropriate method of measurement should be based on the field of application. • The size and shape of grains that comprise a granular pile affect its angle of repose considerably. • The angle of repose of a particular material is not necessarily equal to its angle of internal friction. • There is a vast range of application fields where the use of angle of repose is applicable.