It is defined as "Inelastic deformation". If you have a copy of Tool and Manufacturing Engineers handbook, there is a section on metal forming that covers this topic.
This may be a little late for your request, but Auto Desk could prove to be a good resoruce as they provide AC to most of the commercial sites. Another resource is Solid Works. Good luck
Looking for a source of time study boards. I am interested in the digital display type, not the mechanical one,two, or three watch types.
Thanks in avance