Title

Microscopic Studies of Fractures Generated under Mixed Mode Loading

Abstract

A set of fracture profile photomicrographs is presented for fractures generated under mixed mode loading of the Pittsburgh coal. The fractal dimension is used to characterize the irregularity of these profiles and a tentative relationship is presented between the fractal dimension and the fracture toughness. Surface roughness appears to depend solely on the stress intensity and no other dependence was observed with fracture loading mode, loading rate or specimen orientation. Observations of crack bifurcations in fracture profiles can indicate crack growth direction whereas direct surface observations generally cannot in materials such as rock and coal.

Meeting Name

29th U.S, Symposium on Rock Mechanics

Department(s)

Mining and Nuclear Engineering

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1988 American Rock Mechanics Association (ARMA), All rights reserved.

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