Numerical and Experimental Investigation of Cumulative Fatigue Damage under Random Dynamic Cyclic Loads of Lattice Structures Manufactured by Laser Powder Bed Fusion

Lattice structures are lightweight engineering components suitable for a great variety of applications, including those in which the structural integrity under vibration fatigue is paramount importance. In this work, we experimentally and numerically investigate dynamic response two distinct lattice configurations, terms damage life. Specifically, Face-Centered-Cubic (FCC) Diamond lattice-based studied tested resonant conditions random vibrations, until their failure. To end, Finite Element (FE) models employed to match behavior system neighborhood first natural frequency. The FE estimate by way frequency tip acceleration drops, allow identification failure time corresponding number cycles Fatigue life well predicted application conventional multiaxial high cycle criteria local state stress. same approach, combined with Rainflow algorithm Miner’s rule, provides good results predicting vibrations.