| |
|
S13 Integridade Estrutural |
| |
|
Titulo:
|
A FRAMEWORK TO CORRELATE EFFECTS OF CONSTRAINT LOSS AND DUCTILE TEARING OF FRACTURE TOUGHNESS - PART I: PROBABILISTIC APPROACH
|
| |
|
Resumo :
|
|
THIS STUDY EXPLORES THE DEVELOPMENT OF A PROBABILISTIC (MICROMECHANICS) FRAMEWORK APPLICABLE TO CLEAVAGE FRACTURE TO PREDICT EFFECTS OF CONSTRAINT LOSS AND DUCTILE TEARING ON MACROSCOPIC FRACTURE TOUGHNESS. SPECIFICALLY, A PROBABILISTIC MODEL EMPLOYING THE STATISTICS OF MICROCRACKS (WEAKEST LINK PHILOSOPHY) AND A LOCAL FAILURE CRITERION FOR TRANSGRANULAR CLEAVAGE PROVIDES THE COUPLING BETWEEN THE MICROREGIME OIF FRACTURE (WHICH INCLUDES THE STRESSES THAT DEVELOP AHEAD OF THE MACROSCOPIC CRACK) WITH MACROSCOPIC (REMOTE) LAODING. FOR STRESS-CONTROLLED, CLEAVAGE MECHANISMS OF MATERIAL FAILURE, THE WEIBULL STRESS EMERGES AS A PROBABILISTIC FRACTURE PARAMETER DEFINING CONDITIONS LEADING TO (LOCAL) FRACTURE. THIS PARAMETER PERMITS PREDICTIONS OF THE STRONG EFFECTS OF CONSTRAINT VARIATIONS AND DUCTILE TEARING ON (MACROSCOPIC) CLEAVAGE FRACTURE TOUGHNESS OVER A WIDE RANGE OF LOADING AND CRACK CONFIGURATIONS. |
| |
|
Autores :
|
Ruggieri, Claudio 0
|
| |
|
Trabalho Completo :
|
|
