Karl-Heinz Schwalbe        

Anales de la Mecánica de la Fractura, nº 14 . 1997 . Pág. 30 -48
Ver (.pdf): Anales14-003

Resumen: The fracture parameters being used in EPFM are the J-integral and the crack tip opening displacement Methods are available for determining J and CTOD as driving force paramters as functions of applied load or strain. When using J and CTOD in testing for determining the fracture resistance of a material it is seen that they do not uniquely describe a material' s frncture behaviour. This is due to constraint effects which depend on a number of paramters, in particular geometrical parameters. Recently a further so urce of constraint effects has been extensively reported: if a crack is located near the interfuce between two mechanically dissimilar materials then the crack tip field may be distwbed, resulting in a variation in the driving force and constraint and hence crack growth resistance. Methods are being developed for determining the driving force and crack growth resistance under these circurnstances.

Localización: Ribadesella, Asturias

GKSS-Forschungszentrum Geesthacht. 21502 Geesthacht, Fed. Republic of Gennany