In this article, the fatigue properties of cellular lattice structures have been investigated focusing on the anisotropic fatigue behaviour of the diamond unit cell. An extensive fatigue test campaign has been conducted on diamond-based lattice samples produced using laser powder bed fusion in Ti-6Al-4V, designed with different orientation of the unit cell reference system with respect to the load direction. Results indicate that, form a global stress point of view, diamond-based lattice structures exhibit a severe anisotropic fatigue behaviour, that is enhanced by geometrical deviations induced by the manufacturing process. A local stress based method is proposed to account for this unit cell behaviour in predicting its fatigue life.
Fatigue behaviour of diamond based Ti-6Al-4V lattice structures produced by laser powder bed fusion: On the effect of load direction
Cutolo A.;
2022-01-01
Abstract
In this article, the fatigue properties of cellular lattice structures have been investigated focusing on the anisotropic fatigue behaviour of the diamond unit cell. An extensive fatigue test campaign has been conducted on diamond-based lattice samples produced using laser powder bed fusion in Ti-6Al-4V, designed with different orientation of the unit cell reference system with respect to the load direction. Results indicate that, form a global stress point of view, diamond-based lattice structures exhibit a severe anisotropic fatigue behaviour, that is enhanced by geometrical deviations induced by the manufacturing process. A local stress based method is proposed to account for this unit cell behaviour in predicting its fatigue life.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
