Masters Theses

Seung-ki Yang

Abstract

"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.

Advisor(s)

Haas, Charles J.

Committee Member(s)

Foster, J. Earl
Rocke, R. D. (Richard Dale), 1938-

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Engineering Mechanics

Sponsor(s)

Air Force Weapons Laboratory

Publisher

University of Missouri--Rolla

Publication Date

1970

Pagination

ix, 117 pages

Note about bibliography

Includes bibliographical references (pages 121-122).

Rights

© 1970 Seung-ki Yang, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Strength of materials -- Evaluation
Fracture mechanics -- Mathematical models
Strains and stresses -- Measurement
Rocks -- Fracture

Thesis Number

T 2491

Print OCLC #

6029367

Electronic OCLC #

869897767

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