Accession Number : AD0685866

Title :   A STUDY OF THE MECHANICS OF CLOSED-DIE FORGING. FORGING LOADS AND STRESSES IN CLOSED-DIE FORGING. PART I.

Descriptive Note : Interim topical rept. no. 3, 1 Aug 68-30 Jan 69,

Corporate Author : BATTELLE MEMORIAL INST COLUMBUS OHIO COLUMBUS LABS

Personal Author(s) : Altan,T. ; Henning,H. J. ; Sabroff,A. M.

Report Date : 15 MAR 1969

Pagination or Media Count : 43

Abstract : Various empirical formulas suggested for predicting the maximum forging load are reviewed. The empirical formulas are very useful in predicting loads for forgings similar to the ones evaluated in deriving these formulas. They do not, however, give any information on local deformations and stresses in a forging. The slab method is used in analyzing plane strain and axisymmetric upsetting between parallel and inclined platens. The determination of flow models representing the deformation and metal flow in closed-die forging is discussed. As a first example, the theory developed has been applied to an axisymmetric forging. The predicted cavity and flash loads agreed well with the experimental results obtained by other investigators. As a second example, the determination of the stress distribution in plane-strain forging of a blade is illustrated. The analyses presented in this report will be helpful in obtaining detailed information on the mechanics of the closed-die-forging process. In the present report, deformations of the upsetting type were studied. (Author)

Descriptors :   (*FORGING, LOADS(FORCES)), STRESSES, MATHEMATICAL PREDICTION, DEFORMATION, NUMERICAL ANALYSIS

Subject Categories : Fabrication Metallurgy
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE