CALIBRATION AND EVALUATION OF THE LEMAITRE DAMAGE MODEL USING AXIALTORSION FATIGUE TESTS ON FIVE ENGINEERING ALLOYS
THE LEMAITRE DAMAGE MODEL IS EVALUATED USING FATIGUE TEST DATA FROM FIVE ENGINEERING ALLOYS: 1045 STEEL, 16MNR STEEL, 7075-T651 AL ALLOY, EXTRUDED AZ61A MG ALLOY, AND EXTRUDED AZ31B MG ALLOY. TENSION–COMPRESSION, TORSION, PROPORTIONAL AXIAL-TORSION, AND 90° OUT-OF-PHASE AXIAL-TORSION LOADINGS WERE INVESTIGATED. THE RESULTS SHOW THAT THE OVERALL ACCURACY OF THE FATIGUE LIFE ESTIMATES MADE BY USING THE LEMAITRE MODEL IS COMPARABLE TO THOSE OB-TAINED BY FATIGUE MODELS THAT REQUIRE THE DEFINITION OF A LOADING CYCLE. A SIMPLE AND EFFECTIVE METHOD IS DESCRIBED FOR DETERMINING THE MATERIAL CONSTANTS OF THE LEMAITRE MODEL.
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