CIRP Encyclopedia of Production Engineering

2019 Edition
| Editors: Sami Chatti, Luc Laperrière, Gunther Reinhart, Tullio Tolio

Formability (Damage)

  • Dorel Banabic
  • Luigino FiliceEmail author
Reference work entry



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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Copyright information

© CIRP 2019

Authors and Affiliations

  1. 1.CERTETA-Research Center in Sheet Metal FormingTechnical University of Cluj Napoca, RomaniaCluj NapocaRomania
  2. 2.Department of Mechanical, Energy and Management EngineeringUniversity of CalabriaArcavacata di Rende (CS)Italy

Section editors and affiliations

  • Bernd-Arno Behrens
    • 1
  1. 1.Institute of Forming Technology and Machines (IFUM)Leibniz Universität Hannover (LUH)GarbsenGermany