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FRACTURE SURFACE DEVELOPMENT IN AN OVERLOADED D16T Al‐ALLOY SUBJECTED TO BIAXIAL LOADING. A FRACTOGRAPHIC ANALYSIS
Author(s) -
Shanyavsky A. A.,
Orlov E. F.
Publication year - 1997
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.1460-2695.1997.tb00275.x
Subject(s) - materials science , fractography , fracture (geology) , alloy , composite material , metallurgy
— Fatigue crack growth experiments were carried out on cruciform specimens of D16T Al‐alloy, loaded under uniaxial and biaxial loads, including a sequence of various overloads. It is shown that, for biaxial cyclic loads at stress ratios λ and various R ‐ratios, fracture surface development during overloads and the crack length dependences on the cyclic loads following overloads are similar to those for uniaxial loading. The aim of this investigation was to study interaction effects by analyzing the crack retardation length and associated parameters together with their relationships. These parameters’depend on the biaxial ratio (λ) and the stress ratio ( R ) and their uses in crack growth modelling are briefly considered.