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Date of Award

11-1974

Degree Type

Thesis

Degree Name

Master of Engineering (ME)

Department

Mechanical Engineering

Supervisor

Professor R. Sowerby

Abstract

Some instability theories relating to the stretch forming of sheet metal are reviewed, and a comprehensive computer programme based on Marciniak's modified mathematical model is developed to determine, theoretically, the Forming Limit Diagram. Also, Kasper's Shape Analysis technique is analyzed in the form of an Optimization model, and an attempt is made to correlate it with the theoretically determined FLD in order to predict the formability of sheet metal in advance. At the same time, a testing rig is designed, built and tested for the determination of the FLD of thicker guage materials under laboratory conditions.

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