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Theoretical Formability. Volume I. Development

Report Number: ASD TR 61-191 (I)
Author(s): Wood, W. W. ; Goforth, R. E.; Ford, R. A., et al
Corporate Author: Vought Aeronautics
Laboratory: Directorate of Materials and Processes
Date of Publication: 1961-08
Pages: 384
Contract: AF 33(616)-6951
Project: 7381
AD Number: ADA286700

The cut-and-try method of determining sheet metal formability has long been the standard practice in the aircraft industry. This two-volume report presents methods of determining formability analytically for the twelve most common processes of forming sheet metal. This method is based on utilization of a material's mechanical properties to predict formality. The first volume on development gives the procedure used to arrive at the objective of predicting formability. First, basic limit equations are developed relating geometry of the parts to the material properties. These equations are used to determine the shape of the limit graphs and to give indices relating formability to the material. Then, experimental parts are formed to position the theoretically shaped curves with the aid of the formability indices.

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