The formability is the capability of a material to undergo plastic deformation to a given shape without defects. Formability limits are a hard constraint when sheet metal parts are manufactured, but also in bulk metal forming, formability limits can be reached leading to faulty parts.
In general the term “formability” usually refers to sheet metals.
Theory and Application
Sheet Metal Formability
At the end of the nineteenth century, due to the development of the sheet forming technology, sheet metal formability became a research topic. Starting from that time, different tests have been proposed. All of them are based on the measure of the maximum deformation that a sheet metal sample can reach.
Sheet metal-forming processes can be characterized by two basic types of deformation patterns: drawing and bending. Concerning drawing one has to distinguish stretching (all the in-plane strain components are greater than zero) and deep drawing...
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