ULTIMATE TESTS ON HV SCREWS WITH ROLLED THREADS TO ESTABLISH NEW K VALUES AND TIGHTENING MOMENTS

ABWUERGVERSUCHE MIT HV-SCHRAUBEN MIT GEROLLTEM GEWINDE ZUR FESTLEGUNG NEUER K-WERTE UND ANZIEHMOMENTE

IN ASSEMBLIES OF HV SCREWS IT WAS ESTABLISHED THAT THE TIGHTENING MOMENTS REQUIRED IN ACCORDANCE WITH SPECIFICATION VR 1963 ARE NOT ACCEPTED, AND THAT PLASTIFICATION OCCURS. THE NEW STANDARDIZED THREAD FOR ALL HV SCREWS RESULTED IN LOWER K-VALUES IN PRELIMINARY TESTS, SO THAT IN ACCORDANCE WITH P(V) = M(A)/K X D LOWER TIGHTENING TORSION MOMENTS ARE REQUIRED. PRINCIPLES ARE TO BE ESTABLISHED FOR THE NEWLY ESTABLISHED K-VALUES. THE ULTIMATE TESTS WERE CARRIED OUT ON DIAMETERS MAINLY USED IN STEEL ENGINEERING - 16MM AND 66MM, AND THEN ON ALL OTHER CONVENTIONAL DIAMETERS UP TO M 27. THE RESULTS OF THE TESTS WERE EVALUATED STATISTICALLY.

    Language

    • German

    Project

    • Status: Completed
    • Sponsor Organizations:

      DEUTSCHER AUSSCHUSS FUER STAHLBAU

      EBERTPLATZ 1
      KOELN,   Germany  D-5000
    • Project Managers:

      STEINHARDT, O

    • Performing Organizations:

      KARLSRUHE UNIV. (TH), VERSUCHSANSTALT FUER STAHL, HOLZ UND STEINE (TECHNICAL UNIVERSITY OF KARLSRUHE, TESTING INSTITUTE FOR STEEL, WOOD AND STONES)

      KAISERSTR. 12
      KARLSRUHE,   Germany  D-7500
    • Start Date: 19730000
    • Expected Completion Date: 0
    • Actual Completion Date: 19730000
    • Source Data: ITRD D700778

    Subject/Index Terms

    Filing Info

    • Accession Number: 01304228
    • Record Type: Research project
    • Source Agency: Bundesanstalt für Straßenwesen (BASt)
    • Files: ITRD
    • Created Date: Nov 21 2010 9:49AM