Analyzing the influences of fabrication methods on the mechanical properties of Sumberejo kenaf/epoxy sandwich composites with polyurethane foam coreIlva Zahrotin, Ariadne Laksmidevi Juwono, Januar Parlaungan Siregar, Seto Roseno, Saeful Rohman, Eryanti Kalembang and Wahyudin WahyudinITM Web Conf., 61 (2024) 01021DOI: https://doi.org/10.1051/itmconf/20246101021