THE CAUSE OF ROAD CORRUGATIONS AND THE INSTABILITY OF SURFACES UNDER WHEEL ACTION. PARTS 1&2

EXPERIMENTS WERE CONDUCTED TO INVESTIGATE THE CORRUGATION PHENOMENA IN A SMALL TEST TRACK. THE TRACK WAS LAID WITH SAND, OR OTHER MATERIALS TO BE TESTED. WHEELS OF VARIOUS DIAMETERS TRAVERSED THE TRACK. THE WHEEL IS SPRING-MOUNTED ON A REVOLVING ARM WHICH IS PIVOTED AT THE CENTER OF THE TRACK AND ALSO HINGED TO ALLOW FREE VERTICAL MOVEMENT. A VARIABLE SPEED ELECTRIC MOTOR IS COUPLED THROUGH REDUCTION GEARING TO THE WHEEL SHAFT, ALLOWING ANY SPEED UP TO 10 MPH. IT WAS DEMONSTRATED THAT FOR A GIVEN VEHICLE AND SURFACE MATERIAL, THE CORRUGATION PITCH ALWAYS INCREASES WITH SPEED. ACCORDING TO THE WHEEL-BOUND THEORY, THE CORRUGATION PITCH AT ANY GIVEN SPEED DEPENDS ON: (1) THE VEHICLE CONSTANTS, AND (2) THE PROPERTIES OF THE SURFACE MATERIAL. PITCH AND AMPLITUDE ALWAYS INCREASE MONOTONICALLY. A CRITICAL SPEED CONCEPT WAS OBSERVED, BELOW WHICH CORRUGATIONS NEVER DEVELOPED AND ABOVE WHICH THEY DEVELOPED FASTER AND AT HIGHER SPEEDS. THE WHEEL BOUNCE THEORY IS PROPOSED IN QUANTITATIVE FORM.

  • Supplemental Notes:
    • May & June, PP 617-620 & PP 781-784, 11 FIG, 2 TAB, 6 REF
  • Authors:
    • Mather, K B
  • Publication Date: 1962

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  • Accession Number: 00206765
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 12 1994 12:00AM