Abstract
In the past decade, sheet metal forming research has been almost entirely devoted to numerical modeling of processes using techniques such as the finite element method, to improvements in the description of material behaviour and to the development of procedures for failure analysis in pressings. Three areas which appear to have been neglected are analytical modelinq following the pioneering work of Sachs and Swift, development of approximate techniques suitable for interactive computer-aided process design and the exploration of some of the challenging problems of a purely geometrical nature which exist in sheet metal engineering. This paper reviews recent work in computer-aided design models for limit strains, air-bending in a press brake and rubber forming. It describes the application of simple analyses to the problem of shape control in smoothly contoured panels and shows the results of an improved method of experimental strain analysis. It is suggested that considerable potential exists for useful contributions to sheet metal engineering based on these particular types of techniques.
Published Version
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