A LABORATORY SCALE MODEL TECHNIQUE FOR INVESTIGATING PNEUMATIC TIRE HYDROPLANING

A NEW TECHNIQUE IS DEVELOPED FOR LABORATORY INVESTIGATION OF PNEUMATIC-TIRE HYDROPLANING THROUGH EXPERIMENT WITH SMALL-SCALE TIRES ON A TREADMILL RUNWAY-SIMULATOR. THE TIRES ARE MOUNTED ON A MODIFIED AIRCRAFT-LANDING-GEAR ASSEMBLY WHICH PERMITS FREEDOM IN HEAVE UNDER VARIABLE VERTICAL LOAD AND ALLOWS MEASUREMENT OF THE LONGITUDINAL FORCE EXERTED ON THE TIRE. THE TREADMILL IS CAPABLE OF SPEEDS UP TO 90 FEET PER SECOND, AND IS OUTFITTED WITH A WATER-SUPPLY SYSTEM AND A NOZZLE WHICH DELIVERS A WATER LAYER 1-FOOT WIDE, OF VARIABLE THICKNESS, AT MATCHING SPEED. THE MODEL TIRES ARE FABRICATED OF POLYURETHANE FOAM, THE DENSITY OF WHICH IS VARIED TO SIMULATE VARIATIONS IN PNEUMATIC-TIRE INFLATION PRESSURE. CORRELATION OF DETAILED LOAD-DEFORMATION DATA FOR MODEL AND PROTOTYPE TIRES DEMONSTRATES THAT GEOMETRIC SIMILARITY IS ACHIEVED UNDER STATIC CONDITIONS. DIMENSIONAL ANALYSIS HAS BEEN EMPLOYED TO DERIVE ADDITIONAL REQUIREMENTS FOR DYNAMIC SIMILARITY AND TO DEVELOP A DESIGN FOR THE INITIAL SERIES OF EXPERIMENTS. /SRIS/

• Supplemental Notes:
  • 29 Pp, 15 FIG, 10 REF
• Corporate Authors:

  Stevens Institute of Technology

  711 Hudson Street
  Hoboken, NJ  United States  07030
• Authors:
  • Dugoff, H
  • Ehrlich, I R
• Publication Date: 1968-5

Subject/Index Terms

• TRT Terms: Deformation; Dimensional analysis; Hydroplaning; Loads; Mathematical models; Pneumatic equipment; Ratios; Simulation; Statics; Tires
• Uncontrolled Terms: Models; Vertical loads
• Old TRIS Terms: Pneumatic tire; Scale (Ratio); Static conditions; Treadmill
• Subject Areas: Highways; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00223190
• Record Type: Publication
• Source Agency: Nat Safety Council Safety Res Info Serv
• Files: TRIS
• Created Date: Jun 29 1970 12:00AM