Theses and Dissertations

Issuing Body

Mississippi State University


Jones, E. William

Committee Member

Berry, John T.

Committee Member

Daniewicz, Steven R.

Date of Degree


Original embargo terms

MSU Only Indefinitely

Document Type

Graduate Thesis - Campus Access Only


Mechanical Engineering

Degree Name

Master of Science


College of Engineering


Department of Mechanical Engineering


The objective of this research is to simulate a pushorming operation for the manufacturing of copper tube elbows using the finite element method. This model may be useful in the design of tooling. The influences of lubricant type, the tube blank material, and a minute surface defect are considered in the model. Tensile tests of annealed copper specimens are conducted to derive stress-strain data, defining the material behavior of the copper tube blank. In addition, friction tests are performed to obtain static and dynamic friction coefficients for a wet and dry lubricant types, which are used in the forming process. The finite element study of the forming operation has proven to require a considerable amount of time for modeling and processing. The verification examples and the pushorming models demonstrate the ability of the finite element program to include: contact with friction, the actuating of hydraulically controlled components, buckling, and nonlinearity.