Accession Number:

ADA149863

Title:

Thermoviscoplastic Analysis of Metal Forming Problems by the Finite Element Method,

Descriptive Note:

Corporate Author:

CALIFORNIA UNIV BERKELEY

Personal Author(s):

Report Date:

1984-01-01

Pagination or Media Count:

26.0

Abstract:

When deformation takes place at high temperatures, material properties can vary considerably with temperature. During a metalworking process, heat generation usually occurs, and if the dies are at considerably lower temperature than the workpiece, the heat losses by conduction to the dies and by radiation and convection to the environment result in severe temperature gradients within the workpiece. Thus, the inclusion of temperature effects in the analysis of metal-forming problems is very important. Furthermore, at elevated temperatures, plastic deformation can induce phase transformations and alterations in grain structures which in turn can modify the flow resistance of the material as well as other mechanical properties. Our main concern here is the analysis of plastic deformation processes in the warm and hot forming regime. The importance of temperature calculations during a metal-forming process has been recognized for a long time. Until recently, the majority of the work had been based on procedures that uncouple the problem of heat transfer from the metal deformation problem. Additional keywords charts, reprints.

Subject Categories:

  • Properties of Metals and Alloys
  • Fabrication Metallurgy
  • Plastics
  • Numerical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE