Sociedad Española de Integridad Estructural
Grupo Español de Fractura

Sociedad Española de Integridad Estructural
Grupo Español de Fractura

Publicaciones del Grupo Español de Fractura

Listado de Publicaciones

Todas estas publicaciones se ofrecen de forma gratuita y son de libre difusión. También puedes descargar las actas completas».

A NUMERICAL ANALYSIS OF THE RELATION BETWEEN CTOD AND FATIGUE CRACK GROWTH

D. Camas  F.V. Antunes  S.M. Rodrigues      

Anales de la Mecánica de la Fractura, nº 33 . 2016 . Pág. 170 -175
Ver (.pdf): Anales33-026

Resumen: Engineering analysis of fatigue crack propagation is usually performed by relating da/dN to ?K. However, the emphasison ?K parameter must be replaced by a close look to non-linear crack tip parameters, because these effectively control fatigue crack growth rate. The main objective here is to improve the understanding of fatigue crack growth using the crack tip opening displacement (CTOD). This parameter has not been totally exploited in the context of crack closure and fatigue propagation, and has a great potential. A numerical analysis was therefore developed for a wide range of constant amplitude tests in two aluminium alloys (6016-T4 and 6082-T6). Without contact of crack flanks there is a well defined relation between maximum CTOD and ?K, which indicates that there is no influence of stress ratio, andd validates the linear elastic fracture mechanics. A linear correlation was found between the CTOD and ?K in log-log scales. The CTOD predicted with contact of crack flanks overlap the results without contact only when ?Keff is uused, which validates the crack closure concept. A linear relation was found between da/dN and CTOD in log-log scales for the 6082-T6 aluminium alloy.

LocalizaciónSan Sebastián

Departmento de Ingeniería Civil, de Materiales y Fabricación, Universidad de Málaga, Escuela Politécnica Superior, C/Dr. Ortiz Ramos, s/n. Campus de Teatinos, Málaga, Spain
CEMUC, Department of Mechanical Engineering, University of Coimbra
CEMUC, Department of Mechanical Engineering, University of Coimbra




Enlaces directos

Últimas noticias

Contacto

Información general
info@gef.es

Administración
secretaria@gef.es

Cuotas y recibos
socios@gef.es