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Hardiyanto, D. and Tjahjanti, P.H. 2026. Optimal Composition Ratio Achieves Maximum Compressive Strength in Sandwich Panels: Rasio Komposisi Optimal Menghasilkan Kekuatan Tekan Maksimal pada Panel Sandwich. Indonesian Journal of Innovation Studies. 26, 4 (May 2026), 10.21070/ijins.v26i4.2125. DOI:https://doi.org/10.21070/ijins.v26i4.2125.