BEHAVIOUR OF HOLLOW CIRCULAR SECTION WITH MULTIPLE PERFORATIONS UNDER COMPRESSION, FLEXURE AND TORSION
EFFECT OF THE PRESENCE OF PERFORATIONS ON THIN STRUCTURE HAS BEEN EXTENSIVELY INVESTIGATED FOR DECADES. VARIOUS PERFORATION PARAMETERS WERE INVESTIGATED IN PAST STUDIES. HOWEVER, STUDY ON THIN CYLINDER WITH MULTIPLE PERFORATIONS HAS NOT BEEN CARRIED OUT. IN SEARCHING FOR LIGHTER STRUCTURAL MEMBERS, THE CONCEPT OF PERFORATED HOLLOW SECTION HAS BEEN INSPIRED BY THE SHAPE AND ARRANGEMENT OF MULTIPLE PERFORA-TIONS OBSERVED IN THE CHOLLA SKELETON. EFFECTS OF MULTIPLE PERFORATIONS PARAMETERS ON CIRCULAR HOLLOW SECTION HAVE BEEN THE MAIN INTEREST. THIS PAPER PRESENTS THE VERIFICATION OF FEM SIMULATION WITH EXPERI-MENTAL ANALYSIS. A NON-PERFORATED CIRCULAR HOLLOW SECTION (CONTROL MODEL) AND A CIRCULAR HOLLOW SECTION PENETRATED WITH 12 NOS. OF CIRCULAR SHAPE PERFORATIONS IN ARRAY ARRANGEMENT WERE DECIDED FOR THE VERIFICATION PROCESS. BOTH PHYSICAL AND FEA MODELS WERE ANA-LYZED UNDER COMPRESSION, FLEXURAL AND TORSIONAL LOADS. FOR RESULT COMPARISON WITHIN THE MATERIAL LINEAR RANGE, FEA MODELS SHOW GOOD AGREEMENT WITH EXPERIMENTAL RESULTS FOR COMPRESSION AND FLEXURAL LOAD CASES, AND FOR CONTROL MODELS UNDER TORSIONAL LOAD CASE. FOR PERFORATED MODELS UNDER TORSIONAL LOAD, FEA RESULTS CORRESPOND WELL WITH THE INCLINED STRAIN GAUGE READINGS. FEM ANALYSIS METHOD IS CONSIDERED CAPABLE TO PRODUCE RELIABLE RESULT FOR LOADING WITHIN THE LINEAR RANGE FOR CIRCULAR HOLLOW SECTIONS WITH MULTIPLE PERFORATIONS.
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