Dual graded lattice structures Framework: STL Files for Lattice Generation Testing and dual graded Compression Test Specimens

Additive manufacturing enables the production of complex structured parts with tailored properties. Instead of manufacturing parts as fully solid, they can be infilled with lattice structures to optimize mechanical, thermal, and other functional properties. A lattice structure is formed by the repetition of a particular unit cell using a certain defined pattern. The unit cell's geometry, relative density, and size dictate the lattice structure's properties. Functionally graded lattice structure al-lows for further part optimization, where certain domains of the part require denser infill compared to other domains. This repository consists of two compressed files. In the first compressed file, the specimens to test the dual graded lattice structure (DGLS) generation framework is attached. This framework can grade both the size and the relative density or porosity of standard and custom unit cells simultaneously as a function of the structure spatial coordinates. Popular benchmark parts from different fields were used to test the framework's efficiency against different unit cell types and grading equations. The second compressed file contains the STL files for 19 uniquely designed compression test specimens generated using the DGLS to study the effect of lattice structure dual grading on mechanical properties. It was found that combining both relative density and size grading fine-tunes compressive strength, modulus of elasticity, absorbed energy, and fracture behavior of the lattice structure. For more information refer to: Mostafa, K.G.; Momesso, G.A.; Li, X.; Nobes, D.S.; Qureshi, A.J. Dual Graded Lattice Structures: Generation Framework and Mechanical Properties Characterization. Polymers 2021, 13, 1528. https://doi.org/10.3390/polym1309152