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Fatigue Crack Growth in Austenitic Stainless Steel: Effects of Phase Shifted Loading and Crack Paths
Author(s) -
Wolf Carl H.,
Henkel Sebastian,
Burgold Andreas,
Qiu Yangxi,
Kuna Meinhard,
Biermann Horst
Publication year - 2019
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201800861
Subject(s) - cruciform , materials science , crack closure , stress intensity factor , phase (matter) , composite material , stress concentration , paris' law , crack growth resistance curve , stress (linguistics) , structural engineering , austenitic stainless steel , fracture mechanics , corrosion , linguistics , chemistry , philosophy , organic chemistry , engineering
In this study, the cyclic crack growth behavior of biaxially loaded cruciform specimens is investigated and compared with an uniaxially loaded cruciform specimen together with the Paris law to detect differences between uniaxial and multiaxial experiments and to understand the occuring mechanisms. The tests are performed on a planar‐biaxial test system and a stress ratio of R = 0.1. Biaxial loading takes place both in‐phase as well as out‐of‐phase, after an initial technical crack is generated, whereby the phase shift loading leads to a constantly changing biaxial force ratio λ . The crack path curved after changing from in‐phase to out‐of‐phase loading and subsequently the cracks grow straight again. Both cracks of each specimen have an almost identical crack path indicating a symmetrical stress distribution on the specimen. The calculation of the stress intensity factor range Δ K for the curved crack path is done by FE‐calculations.