Accession Number : AD0635572

Title :   QUARTERLY REPORT OF TECHNICAL PROGRESS.

Descriptive Note : Issue no. 3,

Corporate Author : MARTIN CO DENVER COLO CENTER FOR HIGH ENERGY FORMING

Personal Author(s) : Ezra, A. A.

Report Date : 01 APR 1966

Pagination or Media Count : 31

Abstract : The report includes: (1) Information Retrieval System: Work was begun on adapting an existing computer program at the University of Denver for storage and retrieval of information in high energy rate forming. (2) Shock Hardening or Strengthening of Metals: Investigations began on the use of a mouse-trap type of plane wave generator to provide known dynamic pressures. Velocity measurement techniques are being developed. Techniques are being developed for the preparation of specimens of shock loaded metals for electron microscope examinations. (3) Strain Rate Effects: Progress has been made in developing the optical light lever and streak camera techniques for measuring free surface displacements as a function of time. Strain rate of the order of 100 inches per inch per sec. were observed. (4) Computer Program for Predicting Process Parameters: The differential equations of motion for the large dynamic plastic deformation of a metal blank were programmed for solution on an IBM 1620 computer. Large deflection analysis was used, and implicit integration is being used in the programming to speed up computations. (5) Theoretical Determination of Formability Limits: The minimum blank width to diameter ratio required to prevent uneven pull was investigated theoretically.

Descriptors :   (*EXPLOSIVE FORMING, REPORTS), INFORMATION RETRIEVAL, HARDENING, STRAIN(MECHANICS), DIFFERENTIAL EQUATIONS, EQUATIONS OF MOTION, DEFORMATION, DEFLECTION, HIGH SPEED PHOTOGRAPHY, ELECTRON MICROSCOPY, ALUMINUM ALLOYS

Subject Categories : Metallurgy and Metallography
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE