Masters Theses

Abstract

"This investigation was conducted to determine the thermal effect of temperature level, surface roughness, and curing pressure on bars and bonded interfaces.

The equipment used in this investigation is shown in Fig. 1 and Fig. 2. The four specimens used, cylindrical aluminum alloy bars, were cut radially at their midpoints and faced on a lathe. Heat was supplied by an electrical resistance heating element and an ice bath was used to conduct heat from the alloy specimen. A heat shield was used to insure one dimensional heat flow. Spacers were placed in the insulation at the top, the interface, and the bottom of the aluminum bar to prevent heat conduction around the interface. These spacers also made a more constant temperature gradient in the insulation around the heat source and heat sink. This setup is shown in Fig. 6. Eighteen thermocouples located at three radial positions at six different levels were used to measure the heat flow through the test cylinder. Radial losses were controlled by six resistance heaters in the heat shield. Losses through the insulation were kept to less than 4.5%.

Partial results from the tests are shown in Tables IV, V, and VI. Figures 9, 10, and 11 show the effect of curing pressure, surface roughness, and temperature level on the thermal resistance of bare and bonded interfaces.

The thermal resistance of the bare interface increased with surface roughness, as did the resistance of the epoxy filled interface cured at 2 psi. Because of a change in the adhesive layer thickness the thermal resistance of the bond layer decreased with curing pressure. Thermal resistance decreased with an increase in mean interface temperature for all tests conducted"--Abstract, pages ii-iii.

Advisor(s)

Remington, Charles R., 1924-2013

Committee Member(s)

Miles, Aaron J.
Kerr, Richard H., 1907-1980
Rhea, L. G.

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Mechanical Engineering

Publisher

University of Missouri at Rolla

Publication Date

1964

Pagination

vii, 42 pages

Note about bibliography

Includes bibliographical references (pages 38-40).

Rights

© 1964 David Leo Schwaller, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 1668

Print OCLC #

5963248

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