Code and data for: Size effect of imperfect interfaces on the stiffness of TPMS interpenetrating phase composites

Finite element code and results for the effective stiffness of interpenetrating phase composites (IPCs) with triply periodic minimal surface (TPMS) frames and a linear spring interface. The data cover sheet and network frames of four topologies (gyroid, diamond, primitive, I-WP) at several frame volume fractions, modulus contrasts, interface stiffness ratios and mesh resolutions (4336 FE cases), a no-tension interface check, a dilute-sphere verification against a closed-form solution, the tables of the Supplementary Material and the data behind the figures. The package also contains the raw load-displacement records of the compression tests on PLA-cement paste IPCs of Le et al. (J. Appl. Mech. 91 (2024) 091008) that are re-analyzed in the associated article.