"The strain conditions around statically loaded circular openings in rock-like materials and corresponding cavity-wall displacements were determined experimentally with resistance strain gages. The models were fabricated with lined and unlined openings simulating underground tunnels. Tests were performed with models of two different materials in plane stress and plane strain. Rock-like materials were designed and the strain gages were embedded at selected points within each model. The models often failed by tensile splitting through the opening early in the loading cycle causing the strains at certain points to deviate considerably from the theoretical values. Tangential strains on the vertical axis were usually tensile although most predicted values were compressive. The stress concentration around the opening was not always a critical factor in the structural failure of the model"--Abstract, page ii.
Haas, Charles J.
Foster, J. Earl
Rocke, R. D. (Richard Dale), 1938-
Mechanical and Aerospace Engineering
M.S. in Engineering Mechanics
Air Force Weapons Laboratory
University of Missouri--Rolla
ix, 117 pages
© 1970 Seung-ki Yang, All rights reserved.
Thesis - Open Access
Library of Congress Subject Headings
Strength of materials -- Evaluation
Fracture mechanics -- Mathematical models
Strains and stresses -- Measurement
Rocks -- Fracture
Print OCLC #
Electronic OCLC #
Link to Catalog Record
Yang, Seung-ki, "Failure of lined and unlined small-scale cavities in rock-like materials" (1970). Masters Theses. 7185.