An Advanced Damage Propagation Model of Brittle Fracture

Abstract:

To reduce the coal mining risk, drainage of methane with drills and hydraulic fracture has been put in practice. In the paper, an advanced damage propagation model of brittle fracture is studied based on mode I crack. The localization band of damage is inducted, and the modal of localization of damage around crack-tip is established using fracture and damage mechanics. Besides, the stress distribution in localization of damage is assumed as obeying a quadratic function, thus the stress field around the crack is obtained, and the calculation formula of crack length is presented, which can provide reference for mine production.

• Periodical: Advanced Materials Research (Volumes 538-541)
• Pages: 1711-1715
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.538-541.1711
• Online since: June 2012
• Authors: Chun Zhi Du, Wen Yan Qiu
• Keywords: Brittle Fracture, Fracture Expansion, Localization of Damage, Predictions of Length, Stress Field

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