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\begin{document}

\title{Differences in fatigue crack growth between L-T and S-T orientations in
an aluminium 7050-T7451 plate}



\author[1]{Antunes FV}%
\author[1]{M.F. Borges}%
\author[1]{Jesus J}%
\author[1]{Ricardo Branco}%
\author[2]{Prates P}%
\author[1]{Diogo Neto}%
\affil[1]{Universidade de Coimbra Departamento de Engenharia Mecanica}%
\affil[2]{Universidade de Aveiro Centro de Tecnologia Mecanica e Automacao}%


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  \date{May 24, 2024}


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\begin{abstract}
This study is focused on the anisotropic fatigue crack growth (FCG)
behaviour of an aluminium AA7050-T7451 plate. L-T and S-T orientations
were studied in M(T) samples with W=50 mm, in mode I loading, with
R-ratio of +0.05. A numerical approach was used, assuming that crack tip
plastic strain is the crack driving force. A purely kinematic
elastic-plastic model was calibrated using experimental data from low
cycle fatigue tests of smooth specimens in L and S orientations. The
predicted FCG rates agree well with experimental trends in the Paris'
regime, suggesting that cyclic plastic deformation is the main damage
mechanism. The numerical model was used to estimate the stress ratio
effect for both orientations, which was found to be linked with crack
closure variations. However, the closure free predicted trends for both
microstructural orientations at R=0.05 are not overlapped, suggesting an
effect of microstructure not linked to crack closure.%
\end{abstract}%



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\textbf{Hosted file}

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