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S13 Integridade Estrutural |
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Title:
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MICROMECHANICS AND CONTINUUM MODELING OF 3-D CONTRAINT EFFECTS FOR FRACTURE ASSESSMENTS OF STRUCTURES
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Summary :
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THIS PAPER PRESENTS A SUMMARY OF THE DESCRIPTIVE (CONTINUUM) AND PREDICTIVE (MICROMECHANICS INCORPORATING STATISTICS) APPROACHES TO CHARACTERIZE CONSTRAINT EFFECTS ON CLEAVAGE FRACTURE TOUGHNESS. DISCUSSIONS EMPHASIZE FEATURES OF THE J-Q APPROACH TO EXTEND DESCRIPTIVE FRACTURE MECHANICS USING J-Q TRAJECTORIES. THE PAPER THEN ADDRESSES A LOCAL (MICROMECHANICS) APPROACH FOR CLEAVAGE FRACTURE BASED ON A PROBABILISTIC FRACTURE PARAMETER - THE WEIBULL STRESS. THE PERSENTATION EXPLORES DEVELOPMENT OF A TOUGHNESS SCALING METHODOLOGY BASED UPON WEIBULL STRESS TRAJECTORIES FOR DIFFERENT CRACK CONFIGURATIONS WHICH ENABLES ASSESSMENT OF CONSTRAINT LOSS IN CONVENTIONAL FRACTURE SPECIMENS AND 3-D CRACKED SOLIDS. |
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Author :
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Dodds, Robert H.
Ruggieri, Claudio 0
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Paper View :
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