Study of the Lidinoid Lattice structures as a substitute of expanded polystyrene foams (EPS) in bicyclist helmets

Abstract

Lidinoid structure is a triple periodic minimal surface structure (TPMS) that is de-fined by a mathematic function and cannot be created using traditional manufac-turing technologies, so only additive manufacturing technologies are suitable for this purpose

In this article, it will be studied different parameters of these structures to obtain the mechanical properties under compression efforts. In particular, four different materials, 4 length cells and four volume fractions were tested according with the ASTM D1621/00 using a uniaxial testing machine. Specifically, specific stress-strain curve, energy absorption-strain curve, specific energy absorption-strain curve and efficiency-strain curve were calculated. 

Finally, using 3D scanner, a bicyclist helmet was scanned and 3D model obtained that was the basis to create an innovative helmet using this structure.