A Dynamic Damage Growth Model for Uniaxial Compressive Response of Rock Aggregates

Document Type

Article

Publication Date

5-2002

Department

Department of Civil, Environmental, and Geospatial Engineering; Department of Mechanical Engineering-Engineering Mechanics

Abstract

A model that combines damage evolution theory with dynamic crack growth is developed to investigate the uniaxial compressive response of rock aggregate. A damage parameter that determines the time at which the rock looses its ability to transmit the stress completely is introduced into the model. Flaw distribution in rocks is described by a two parameter Weibull distribution. The model correlates the damage parameter with the dynamic growth of "wing" cracks from the pre-existing microcracks. Influences of model parameters on stress-strain response and failure strength are studied systematically. The results of the dynamic damage evolution model are compared to the experimental observations on three types of rock and a good correlation is obtained.

Publisher's Statement

© 2002 Elsevier Science Ltd. All rights reserved.

Publication Title

Mechanics of Materials

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