Premium
SHEAR LIPS ON FATIGUE FRACTURES OF ALUMINIUM ALLOY SHEETS SUBJECTED TO BIAXIAL CYCLIC LOADS AT VARIOUS R ‐RATIOS
Author(s) -
SHANYAVSKY A. A.,
KORONOV M. Z.
Publication year - 1994
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.1460-2695.1994.tb00829.x
Subject(s) - materials science , aluminium , shear (geology) , aluminium alloy , alloy , composite material , fatigue testing , structural engineering , metallurgy , engineering
An analysis is made of shear lip measurements as observed on fatigue crack surfaces of an aluminium alloy sheet material. It is shown that, for biaxial cyclic loads at stress ratios 1 and various R‐ratios, shear lips were controlled by an equivalent intensity factor K e = K 1 F (λ, R ). For crack growth in air the shear lip width t s was approximately proportional to K 2 e at t s < t * s = 2.5 × 10 −4 m and K 4 E , at t s > t * s where t * s is the critical value of the shear lip dimension. The initiation of shear lips and the orientation of crack growth for different parameters of the loading cycle are briefly considered in the discussion.