BASIC EQUATIONS OF PRESSURE AT REST OF GRANULAR MATERIALS

RATHER THAN A CONTINUOUS TENSOR FIELD, STRESSES IN GRANULAR MATERIALS FORM SOME SORT OF STRESS NETWORK, WHOLLY IRREGULAR AS TO GEOMETRY AND INTENSITY. INTERNAL FORCES ARE ONLY TRANSMITTED IN MUTUAL CONTACTS CHARACTERIZED BY THE FACT THAT THERE EXISTS IN THEM JUST ONE DIRECTION OF THE NORMAL LINE COMMON TO BOTH CONTACTING SURFACES. IN A GENERAL GRANULAR MATERIAL, THE MEAN VALUE OF THE DIRECTIONS OF ALL NORMALS IS A CONSTANT. AN EQUIVALENT GRANULAR MATERIAL IS EVOLVED AND A MODEL IS CONSTRUCTED. BY SOLVING THE EQUILIBRIUM OF EXTERNAL AND INTERNAL FORCES, IT IS SHOWN THAT THE PRESSURE AT REST EXISTS AT VARIOUS RATIOS OF PRINCIPAL STRESSES AND THAT ITS ACTUAL VALUE DEPENDS ON STRESS HISTORY. SINCE THIS RATIO IS KNOWN TO BE VARIABLE, IT IS PROPOSED THAT THE LIMIT VALUES BE DENOTED BY K01 AND K02, AND BE CALCULATED FROM EQUATIONS PRESENTED. /TRRL/

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 69-76

Subject/Index Terms

Filing Info

  • Accession Number: 00236949
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Conf Paper
  • Files: TRIS
  • Created Date: May 15 1973 12:00AM