Maduro, L. P.Baptista, C. A R PTorres, M. A S [UNESP]Souza, R. C.2014-05-272014-05-272011-09-23Procedia Engineering, v. 10, p. 1214-1219.1877-7058http://hdl.handle.net/11449/72691The aluminum alloy 2524 (Al-Cu-Mg) was developed during the 90s mainly to be employed in aircraft fuselage panels, replacing the standard Al 2024. In the present analysis the fatigue crack growth (FCG) behavior of 2524-T3 was investigated, regarding the influence of three parameters: load ratio, pre strain and crack plane orientation of the material. The pre strain of aluminum alloys is usually performed in order to obtain a more homogeneous precipitates distribution, accompanied by an increase in the yield strength. In this work, it was evaluated the resistance of Al 2524-T3 sheet samples to the fatigue crack growth, having L-T and T-L crack orientations. FCG tests were performed under constant amplitude loading at three distinct positive load ratios. The three material conditions were tested: as received(AR), pre strained longitudinally (SL) and transversally (ST) in relation to rolling direction. In order to describe FCG behavior, two-parameter kinetic equations were compared: a Paris-type potential model and a new exponential equation introduced in a previous work conducted by our research group. It was observed that the exponential model, which takes into account the deviations from linearity presented by da/dN versus AK data, describes more adequately the FCG behavior of Al 224-T3 in relation to load ratio, pre strain effects and crack plane orientation. © 2011 Published by Elsevier Ltd.1214-1219engAluminum alloysFatigue crack growthModelingPre strainAircraft fuselagesAl 2024Al-Cu-MgConstant amplitude loadingCrack orientationsCrack planeExponential equationsExponential modelsFatigue cracksKinetic equationsLoad ratioMaterial conditionsPotential ModelPre-strainResearch groupsRolling directionSheet samplesThree parametersAircraft materialsAluminumCerium alloysCracksFatigue crack propagationFatigue of materialsFuselagesGrowth (materials)Integral equationsMechanical engineeringModelsTrabalho apresentado em evento10.1016/j.proeng.2011.04.202Acesso aberto2-s2.0-800529468852-s2.0-80052946885.pdf1837671219865754