Energy absorbing 4D printed meta-sandwich structures: load cycles and shape recovery

Abstract The present study investigates the behavior of solid cellular structures in polylactic acid (PLA) achieved by FDM technology (fusion deposition modelling). geometries are permanently deformed compressive stress and then subjected to shape recovery through application a thermal stimulus. submitted medium–high medium–low compression stresses, evaluating mechanical properties absorption energy as number cycles varies. shows that ability absorb is related density model, well degree damage observed, which increases with increasing load cycles. strongest geometry lozenge grid, most reliable. It no keeps its capability almost constant. increase grid leads an improvement both strength energy, lower incidence microcracks itself due repeated These results open up broad spectrum applications custom-designed field damping.