Reply To: Doubts in Manufacturing & Industrial Engineering :(

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  1. In a multi pass drawing operation, a round bar of 10 mm diameter and 100 mm length is reduced in cross section by drawing it successively through a series of seven dies of decreasing diameter. During each of these drawing operation, the reduction in cross-sectional area is 35%. The yield strength of the material is 200 MPa. Ignore strain hardening.
    The total true strain and final length ?
    Neglecting friction and redundant work, the force in (kN) required for drawing through first die?