Damage and failure of viscoplastic rock-like materials

✍ Scribed by Nicolae Cristescu

• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 889 KB
• Volume: 2
• Category: Article
• ISSN: 0749-6419
• DOI: 10.1016/0749-6419(86)90011-2

✦ Synopsis

Damage and failure by dilatancy of viscoplastic rock-like materials are considered. A damage parameter is introduced which is the total energy release due to microcracking when dilatancy takes place. This is expressed with the irreversible part of the volumetric stress power. The damage parameter can be used to describe the influence of the loading rate on failure, the failure due to creep tests and the influence of the loading history on failure, etc. Failure around underground openings occurring after a certain time interval following excavation can also be predicted. The damage parameter is a part of the constitutive equation and as such can be easily applied to various problems in which deformation of rocks by creep is followed by failure.