Mechanical properties of resin based additively manufactured polymer hybrid lattice structures under quasi-static compression conditions

Creative Commons License

Yasar H., Ayas K., DURMUŞ A., ÇAVDAR K.

JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, cilt.40, sa.4, 2025 (SCI-Expanded, Scopus, TRDizin)

Özet

Lattice structures with high strength to low weight ratios allow lightweight and durable structure design. These structures are used at aviation, defence, automotive, medical device and sport equipment industries with adjustable mechanical properties. In this study, RDIT hybrid lattice cell designed using "rhombic dodecahedron (RD)" and "iso truss (IT)" unit lattice cells. Hybrid and single topology unit cells were used to design cubic lattice structures that's edge length is 30 mm with the same relative density and different configurations. Lattice structures were manufactured with industrial ABS like resin by UV led light curing (LCD) additive manufacturing (AM) method. Quasi static tests were applied on printed lattice structures and the related force-displacement curves were obtained. The total absorbed energy (TSE) of %60 compression values calculated from these curves were used to compare the mechanical performances of unit and hybrid cell lattice structure designs. The effect of unit cell size and number of cells on mechanical properties of lattice structures with the same volume and relative density were investigated. It was found that hybrid lattice structure designs with same relative density have better mechanical stability and enhanced energy absorption capabilities. Lattice structures can be widely used in lightweight designs and energy absorbtion applications with the widespread usage of AM methods.