Abstract
Recent advances in additive manufacturing have enabled cellular architected lattices with unprecedented properties such as ultralight weight and high toughness compared to their solid counterparts. However, continuing challenges remain in understanding the influence of geometric variations on the structural response of composite components. In this study, we exploit the “materials by design” approach for architected lattice-reinforced composite (LRC) with versatile geometric features. Guided by experimental tests and simulations, we characterized the reinforcing mechanism of LRC specimens subjected to axial compression and three-point bending and confirmed the effects of geometric variations on the strength, ductility, and energy absorption of LRC specimens. We also evaluated the effect of lattice volume ratio and spatial arrangements on the flexural response of LRC beams. Appropriate geometric selections were identified for each scenario. We envision that our LRC materials by design can pave the way to further improve the potential of harnessing architected lattices for developing lightweight, high-performance, and tailorable structural systems.
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