Abstract
An analogy is shown to exist between the flow of a viscous fluid and the plane strain deformation of the flange of a deep-drawn cup. A method of finding optimum blank shapes based on the outward extrusion of a viscous fluid between parallel plates is demonstrated. Using this analogy, a computer simulation method is introduced and optimum blank contours obtained for drawing cups of uniform height for a wide variety of cross-sectional shapes. It is suggested that this approach leads to a useful, rapid and accurate computer-aided design method for blank development of irregular deep-drawn cups.
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