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EXPERIMENTAL AND COMPUTATIONAL EVALUATION OF CRACK GROWTH THROUGH A SPATIALLY NON‐UNIFORM MICROSTRUCTURE
Author(s) -
DeGiorgi V. G.,
Harvey D. P.,
Kirby G. C.,
Matic P.
Publication year - 1995
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.1995.tb00877.x
Subject(s) - materials science , fracture toughness , microstructure , finite element method , composite material , enhanced data rates for gsm evolution , rockwell scale , fracture (geology) , fracture mechanics , structural engineering , crack growth resistance curve , crack closure , engineering , telecommunications
— Crack growth through a spatially non‐uniform microstructure of 1045 steel edge‐notched and pre‐cracked panel specimens was investigated experimentally and computationally. The microstructural gradient was produced by heat treatment and differential quenching. A fractographic examination was performed on the crack growth specimens to correlate fracture mode and local toughness. Tensile specimens, corresponding to different sites in the edge‐notched panel, were used to characterize the constitutive response and fracture resistance of the as‐treated material. The Rockwell B hardness was used to identify and map material constitutive responses to corresponding locations in a finite element model of the panel. A debonding algorithm was used in the finite element simulations to model stable crack growth using a local fracture criterion.