Abstract
This research explores the use of Double Arrowhead (DAH) structures, known for their light weight, high compressive stiffness, and energy absorption. A novel truss-supported DAH structure with a circular node was investigated under compression loads. Samples were fabricated using FDM additive manufacturing with both reinforced and non-reinforced PLA filaments. The truss supported DAH structure with a circular node, made from Carbon Fiber reinforced PLA, demonstrated superior performance with a compression strength of 19.3780 MPa, a strength to weight ratio of 0.3561 MPa/g, and a total specific energy absorption of 13903.3367 J/kg.
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