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BOLTED JOINTS WITH RECTANGULAR OR CIRCULAR FILLERS

THIRTY-SIX TESTS OF BOLTED JOINTS WITH EITHER CIRCULAR WASHERS OR RECTANGULAR FILLER PLATES BETWEEN THE FAYING SURFACES WERE TESTED TO DETERMINE THEIR SLIP BEHAVIOR. (ALL JOINTS WERE FABRICATED FROM 1 IN. A36 STEEL PLATE AND WERE FASTENED BY 7/8 IN. A325 BOLTS). FIFTEEN JOINTS HAD CLEAN MILL SCALE ON ALL CONTACT SURFACES. WASHERS RANGING FROM 1-3/4 IN. TO 4-3/8 IN. IN DIAMETER WERE INSERTED BETWEEN THE FAYING SURFACES OF TWELVE JOINTS. AFTER TESTING WITH THE MILL SCALE SURFACES, THESE JOINTS WERE BLAST CLEANED AND RETESTED. SIX BLAST CLEANED JOINTS HAS 3-1/2 IN. DIAMETER, 1/2 IN. THICK CIRCULAR WASHERS INSERTED BETWEEN THE FAYING SURFACES. SIX MORE OF THESE JOINTS HAD 1/2 IN. RECTANGULAR FILLERS INSERTED. SIX ADDITIONAL JOINTS WERE FABRICATED TO SUPPLEMENT THE ORIGINAL FIFTEEN JOINTS. THREE HAD 1/16 IN. THICK RECTANGULAR FILLERS AND THREE HAD 1 IN. THICK RECTANGULAR FILLERS. THE STUDY SHOWED A DECREASE IN SLIP RESISTANCE WHEN FILLER PLATES OR WASHERS WERE INSERTED BETWEEN THE MAIN AND LAP PLATES. TACK-WELDING THE FILLER PLATES OR WASHERS TO THE MAIN PLATES DID NOT CHANGE THE SLIP RESISTANCE. HOWEVER, THE JOINTS WITH WASHERS OR FILLER PLATES TACK-WELDED TO THE MAIN PLATE DID PICK UP LOAD FASTER AFTER FIRST SLIP. THERE WAS NO SIGNIFICANT VARIATION IN SLIP RESISTANCE WITH AN INCREASE IN THICKNESS OF THE FILLER PLATES. /AUTHOR/

  • Supplemental Notes:
    • Report No 318.6, 48 PP, 13 FIG, 5 TAB, 14 REF
  • Corporate Authors:

    Lehigh University

    Fritz Engineering Laboratory
    Bethlehem, PA  United States  18015
  • Authors:
    • LEE, J H
    • Fisher, J W
  • Publication Date: 1968-6

Subject/Index Terms

Filing Info

  • Accession Number: 00208849
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 9 1994 12:00AM