Masters Theses


"An investigation was conducted to determine the influence of member length on thermal contact resistance in a vacuum environment. A model was created which consisted of a center rod axially loaded between two other members. It was assumed that circular macroscopic constriction areas were formed at the contact interface when the rods were loaded. Macroscopic modeling of the contact surfaces makes the thermal contact analysis a function of the mechanical and thermal boundary conditions of the total body. The method of finite differences was employed to calculate the temperature distribution, heat flows, and thermal contact resistance of each member. Data was created as a function of two parameters: (1) the length of the center rod member and (2) the contact radius. The results indicate the following. (1) The contact resistance drastically decreases as the center specimen length decreases. This is particularly true if the ratio of member length to member radius, L₁/b, is less than 0.1. (2) At any particular contact radius, the contact resistance at L₁ /b=1 is twice the contact resistance at L₁/b=0. (3) The contact resistance rapidly increases as the contact radius decreases. (4) The interface temperature distribution everywhere in the contact region is non-isothermal. However, the temperature deviations are small and do not exceed five percent"--Abstract, page ii.


McNary, Ross O.

Committee Member(s)

Sauer, Harry J., Jr., 1935-2008
Ho, C. Y. (Chung You), 1933-1988


Mechanical and Aerospace Engineering

Degree Name

M.S. in Mechanical Engineering


University of Missouri--Rolla

Publication Date



vi, 39 pages

Note about bibliography

Includes bibliographical references (pages 45-46).


© 1971 Larry Martin Cooper, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Vacuum technology
Heat -- Transmission

Thesis Number

T 2540

Print OCLC #


Electronic OCLC #