Masters Theses

Woosoon Bai

Abstract

"This thesis presents the design considerations for a dynamic loading device utilizing a projectile fired from a tube. Also included is a preliminary investigation of the stress-strain relation, under dynamic loading with the device, for a plaster known as Hydrostone. Design of the unit is based on the split Hopkinson pressure bar originally developed by Kolsky and on a similar unit in use at the Lawrence Radiation Laboratory, Livermore, California. The strain pulses along the pressure bars are sensed by resistance wire strain gages and displayed on an oscilloscope. The oscilloscope traces are photographed and manually digitized for insertion into a computer program which gives results in terms of specimen stress, strain and strain rate. The recorded information applied for times of the order of 100 microseconds. All equations in this thesis are based on the one-dimensional theory of stress wave propagation. Further, the material tested is shown to be reasonably isotropic and homogeneous. The design of the loading device and attendant instrumentation has proven to be successful. Experiments were conducted on 1100-0 aluminum samples and Hydrostone plaster. Curves of results are included in the work"--Abstract, page ii.

Advisor(s)

Foster, J. Earl

Committee Member(s)

Haas, Charles J.
Rocke, R. D. (Richard Dale), 1938-

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Engineering Mechanics

Sponsor(s)

United States. Department of Defense

Publisher

University of Missouri--Rolla

Publication Date

1970

Pagination

viii, 54 pages

Note about bibliography

Includes bibliographical references (pages 119-126).

Rights

© 1970 Woosoon Bai, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Stress-strain curves -- Mathematical models
Dynamic testing
Projectiles -- Testing

Thesis Number

T 2517

Print OCLC #

6032280

Electronic OCLC #

871698973

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