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S13 Integridade Estrutural |
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Title:
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A FRAMEWORK TO CORRELATE EFFECTS OF CONSTRAINT LOSS AND DUCTILE TEARING ON FRACTURE TOUGHNESS - PART III: PARAMETER CALIBRATION AND FRACTURE TESTING
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Summary :
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THIS PAPER PRESENTS A NEWLY DEVELOPED PROCEDURE TO CALIBRATE THE WEIBULL STRESS PARAMETERS WHICH BUILDS UPON A SCALING METHODOLOGY TO CORRECT MEASURED TOUGHNESS DISTRIBUTIONS FOR DIFFERENT CRACK CONFIGURATIONS. DETAILED NUMERICAL ANALYSES EMPLOYING A MODIFIED BOUNDARY LAYER (MBL) MODEL AND 3-D FINITE ELEMENT ANALYSES FOR A STANDARD 1(T) SE(B) SPECIMEN SHOW THE STRONG EFFECT OF CONSTRAINT LOSS ON INDIVIDUAL FRACTURE TOUGHNESS VALUES FOR DIFFERENT MATERIAL PROPERTIES. SUCH RESULTS PROVIDE COMPELLING SUPPORT TO CONSTRUCT THE PARAMETER CALIBRATION SCHEME PROPOSED IN THIS
STUDY. THE CALIBRATION PROCEDURE IS THEN APPLIED TO DETERMINE THE WEIBULL STRESS PARAMETER, M (THE WEIBULL MODULUS) FOR A STRUCTURAL C-MN STEEL (BS 4360 GRADE 50D). |
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Author :
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Ruggieri, Claudio 0
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Paper View :
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