- In order to generate practical ways to easily design functional flexible lattice structures, this research seeks to find a way to predict reactive forces of compressed hyperelastic cubic lattice structures. Using 3D printed test coupons, material data was collected for use in finite element analysis. Cubic lattice structures with varying densities and member thicknesses were analyzed via FEA methods and the resultant relation between compressive and reactive forces was curve fitted using the closest fitting function, in this case a quadratic function. Using triangular interpolation of the physical parameters of the lattices and the quadratic equation coefficients, new predictive equations were generated for two new cubic lattice structures of untested parameters. The untested lattices were then analyzed using FEA methods and compared against their predicted interpolated equations. The average percent errors between the predictive equations and the FEA methods for the two models were 1.20% and 4.17%. This shows that for this material and lattice structure, using triangular interpolation to predict reactive forces is sufficient for use in a design cycle.