SLIP-LINE ANALYSIS FOR POWDER COMPRESSION

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  • AOKI RYUICHI
    Dept. of Chem. Eng., The Faculty of Engineering, Yokohama National University
  • SUZUKI MASAYUKI
    Dept. of Chem. Eng., The Faculty of Engineering, Yokohama National University

抄録

From an analogy of the slip-line analysis of metal plastic working, the slip-lines in the stress field of a powder bed compressed by rough parallel plates were drawn and the normal stresses on the wall were calculated using Coulomb''s equation. These calculated values were compared with the experimental data, and the following conclusions were drawn;<br> (1) Under the critical stress state, the compressed powders reveal the same behavior of a continuum as far as it is possible to analyze neglecting the bed density.<br> (2) The powder yield locus for the compress!ve stress field cannot be a Coulomb type straight line, but is a Farley-Valentin type curve convexing to the left.

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