RESPONSE OF A PLASTIC HINGE TO LOW-CYCLE ALTERNATING DEFLECTIONS

AN EXPERIMENTAL TECHNIQUE IS DESCRIBED FOR OBTAINING THE RESPONSE OF A PLASTIC HINGE TO LOW-CYCLE ALTERNATION LOADS IN WHICH A DEFLECTION (STRAIN) RANGE IS PRESCRIBED. THE CYCLE OF LOADING IS CONFINED TO EQUAL AMPLITUDES OF POSITIVE AND NEGATIVE CURVATURE. THIS RESPONSE IS EXPRESSED IN TERMS OF A NONLINEAR MOMENT CURVATURE RELATIONSHIP WHICH MAY SUBSEQUENTLY BE EMPLOYED IN PSEUDO-STATIC STRUCTURAL ANALYSIS TO DERIVE THE LOAD-DEFLECTION CHARACTERISTICS OF ELASTIC-PLASTIC BEAMS AT VARIOUS STAGES OF CYCLIC HISTORY. A BRIEF ACCOUNT IS PRESENTED OF A FATIQUE MACHINE DESIGNED AND CONSTRUCTED FOR TESTING MILD STEEL AT LOW ENDURANCE LEVELS. A FIXTURE FOR PURE BENDING IS DESIGNED TO ADAPT THE MACHINE FOR TESTING BEAMS AND ALSO TO PROVIDE A MEASURING SYSTEM FOR THE APPLIED ALTERNATING MOMENTS. A METER TO MEASURE THE CURVATURE IN THIS ENVIRONMENT IS ALSO DESCRIBED IN DETAIL. SIMILAR FIXTURES ARE ALSO DESCRIBED FOR TESTING CANTILEVER- BEAM SPECIMENS. MOMENT-CURVATURE MODELS ARE GENERATED FOR BEAMS UNDER TERMINAL ALTERNATING MOMENTS IN WHICH AMBIENT STRAIN CONDITIONS ARE CONTROLLED. /AUTHOR/

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  • Supplemental Notes:
    • Vol8, No6, PP241-256
  • Authors:
    • Krishnasamy, S
    • SHERBOURNE, A N
  • Publication Date: 1968-6

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  • Accession Number: 00208481
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 22 1994 12:00AM