SYMPOSIA PAPER Published: 01 January 1966

Techniques Used in Studying the Fracture Mechanics of Rock


Partially broken material was obtained to study the growth of cracks during brittle fracture. In uniaxial compression this was accomplished by placing a simply supported beam in parallel with the rock specimen to limit the advance of the ram when the load-carrying ability of the specimen decreased. Uncertainties associated with straight cylindrical specimens were avoided by using cylinders with a reduced central section. Volumetric strain was computed from two perpendicular strain gages. The onset of crack growth and the work expended against confining pressure were found with the aid of plots of volumetric strain versus stress. Measurements of linear compressibility indicated the predominant direction of crack growth and the increase in porosity.

Author Information

Paulding, B, W
IIT Research Inst., Chicago, Ill.
Price: $25.00
Contact Sales
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Developed by Committee: D18
Pages: 73–86
DOI: 10.1520/STP45137S
ISBN-EB: 978-0-8031-6016-3
ISBN-13: 978-0-8031-6170-2