Doctoral Dissertations

Abstract

"Thermomechanical fracture properties of self-flow refractory castables were derived and presented. The energy release rate for a double cantilever beam was modeled using the finite element method in the presence of a thermal gradient and compared to accepted solutions. The modulus of elasticity of refractory castables is reviewed and measured as a function of temperature by a novel technique, the impulse excitation method. An equation for the energy release rate of the wedge loaded specimen was found and compared to the compact tension, three point bend and double cantilever beam specimen. Energy release rates including the linear elastic energy release rate, critical energy release rate and work of fracture were measured isothermally at room temperature and 600°C, in a gradient from 600°C to room temperature and from room temperature to 600°C and along an isotherm in a thermal gradient. The energy release rates were compared and variations were explained due to composition and thermal gradient. Hasselman's thermal shock parameters were reviewed and converted to fracture mechanics energy release rate and work of fracture values. Thermal expansion was measured and used in conjunction with the energy release rate for crack initiation and work of fracture to calculate and compare non-thermal transport based thermal shock parameters"--Abstract, page iv.

Advisor(s)

Moore, Robert E., 1930-2003

Committee Member(s)

Dharani, Lokeswarappa R.
Rahaman, M. N., 1950-
Carroll, Douglas R.
Ownby, P. D.

Department(s)

Materials Science and Engineering

Degree Name

Ph. D. in Ceramic Engineering

Publisher

University of Missouri--Rolla

Publication Date

Fall 2000

Journal article titles appearing in thesis/dissertation

  • Energy release rates as a function of thermal gradient of self-flow refractory castables by the wedge splitting test method
  • Energy release rate of the wedge loaded specimen by finite element analysis
  • Sample preparation, thermal expansion, and Hasselman's thermal shock parameters of self-flow refractory castables
  • Effect of a thermal gradient on the energy release rate of the double cantilever beam specimen
  • Modulus of elasticity as a function of temperature of self-flow refractory castables by the impulse excitation method

Pagination

xvii, 112 pages

Note about bibliography

Includes bibliographical references.

Rights

© 2000 William Lloyd Headrick, Jr., All rights reserved.

Document Type

Dissertation - Restricted Access

File Type

text

Language

English

Thesis Number

T 7858

Print OCLC #

47147024

Electronic OCLC #

1083130538

Download
Off-campus S&T users

Share My Dissertation If you are the author of this work and would like to grant permission to make it openly accessible to all, please click the button above.

Share

 
COinS