STP647

    Analysis of Sheet Metal Forming to Axisymmetric Shapes

    Published: Jul 1978


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    Abstract

    The objective of this study was to develop an analytical method of predicting the stress and strain distribution in a metal sheet formed into a cup or other axially symmetric geometry. The analysis is done using the finite element method based on the deformation theory of plasticity; the elastoplastic computations account for the large deformation associated with sheet forming operations. The theory behind the computer program is discussed in detail. Examples are given of the strain distributions induced in cups drawn to depths comparable with their diameters. The results also give the stresses, thickness changes, and forming force required. Some comparisons between the calculated and measured strains are discussed, and they show good agreement.

    Keywords:

    metal forming, stretching, drawing, cupping, stress-strain curves, deformation, plastic theory, numerical analysis, metal shapes, strain distributions, formability


    Author Information:

    Levy, S
    Consultant, mechanical engineer, and manager, General Electric Company, Schenectady, NY

    Shih, CF
    Consultant, mechanical engineer, and manager, General Electric Company, Schenectady, NY

    Wilkinson, JPD
    Consultant, mechanical engineer, and manager, General Electric Company, Schenectady, NY

    Stine, P
    Senior research metallurgist and program manager, Stress and Vibration, General Electric Major Appliance Laboratories, Louisville, Ky

    McWilson, RC
    Senior research metallurgist and program manager, Stress and Vibration, General Electric Major Appliance Laboratories, Louisville, Ky


    Paper ID: STP30056S

    Committee/Subcommittee: E28.04

    DOI: 10.1520/STP30056S


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