THEORETICAL STUDIES OF CRATERING MECHANISMS AFFECTING THE STABILITY OF CRATERED SLOPES SMALL-SCALE CRATERING TESTS

A REVIEW IS PRESENTED OF RESEARCH CONDUCTED ON MECHANICS OF CRATERING BY EXPLOSIVES. FUNDAMENTALS ARE PRESENTED OF A NEW THEORY OF DEEP CRATERING. A FEW BASIC SOLUTIONS BASED ON THIS NEW THEORY ARE PRESENTED AND THE CONSEQUENCES OF THE THEORY EXAMINED AND COMPARED WITH EXPERIENCE. LISTED IN THE ORDER OF DECREASING RELATIVE DEPTH, THE THREE CRATER TYPES DEPENDING ON RELATIVE DEPTH OF THE EXPLOSIVE CHARGE ARE: (1) CAMOUFLET AND SUBSIDENCE CRATER, (2) DEEP CRATER, AND (3) SHALLOW OR SURFACE CRATER. THE THEORY PRESENTED ENABLES RATIONAL ANALYSIS OF CAMOUFLETS, SUBSIDENCE CRATERS, AND DEEP CRATERS THAT ARE OF PRIMARY INTEREST FROM AN ENGINEERING STANDPOINT. THE PROBLEM OF A CAMOUFLET IS TREATED AS THE PROBLEM OF EXPANSION, BY VARIABLE INTERNAL PRESSURE, OF A CAVITY INSIDE AN INFINITE SOLID. THE PROBLEM OF A DEEP CRATER IS TREATED SIMILARLY, HOWEVER, CONSIDERING A SEMI-INFINITE SOLID WITH A CAVITY AT FINITE DEPTH. THE MOST IMPORTANT SOLUTIONS WERE EVALUATED AND PRESENTED IN GRAPHS FOR CONVENIENT USE IN THE PRACTICE. A MODIFIED SCALING LAW FOR CRATER DEMENSIONS, TAKING INTO ACCOUNT THE STRENGTH AND DEFORMATION PROPERTIES OF THE CRATERED MEDIUM HAS BEEN DERIVED. IT HAS BEEN ANALYTICALLY DEMONSTRATED THAT THE CONVENTIONAL SCALING EXPONENT IS NOT A CONSTANT, BUT VARIES WITH THE PROPERTIES OF THE EARTH MEDIUM AND THE ACTUAL DEPTH OF BURST. IT HAS ALSO BEEN INDICATED THAT THE EFFICIENCY OF NUCLEAR CHARGES, AS COMPARED WITH CONVENTIONAL EXPLOSIVE CHARGES OF THE SAME ENERGY YIELD, DEPENDS ON PROPERTIES OF THE CRATERED MEDIUM AS WELL AS ON THE DEPTH OF BURST AND THE LEVEL OF THE YIELD.

  • Supplemental Notes:
    • 103 Pp, 33 FIG, TABS, 67 REF, 1 APP
  • Corporate Authors:

    University of Georgia, Experiment

    Georgia Experiment Station
    Experiment, GA  United States 
  • Authors:
    • Vesic, A B
    • Barksdale, R D
  • Publication Date: 1963

Subject/Index Terms

Filing Info

  • Accession Number: 00235421
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 23 1994 12:00AM