This work is licensed under a Creative Commons Attribution-NonCommercial- NoDerivatives 4.0 International License. This is a postprint version of the following published document: Infante García, D., Qian, G., Miguélez Garrido, M. H., & Giner, E. (2019). Analysis of the effect of out-of- phase biaxial fatigue loads on crack paths in cruciform specimens using XFEM. International Journal of Fatigue, 2019(123), 87-95. DOI: 10.1016/j.ijfatigue.2019.01.019 © 2019 Elsevier Ltd.