Wood Material Science and Engineering, 2025 (SCI-Expanded)
In this study, the impact strength of panels with double corrugated cores (circular, rectangular, and hexagonal cross-sections) and single corrugated core (circular, rectangular, and trapezoidal corrugates) with core panels produced in different geometric forms was investigated. According to the results, the impact strengths of the single corrugated core panels were lower than those of the double corrugated core panels. Particularly, the highest impact strength was obtained from the plywood-face sheet circular panel, where the measured along the direction parallel to the panel’s corrugated direction at 35.67 kJ/m². The lowest impact strength was determined as 4.83 kJ/m² in the fiberboard-faced rectangular corrugated core panel tested in the direction perpendicular to the corrugated. As a result, based on the experimental study, it was determined that different geometric forms applied to the core of wood-based sandwich panels lead to reductions in the impact strength of such panels. The reduction in impact strength suggests that the use of different materials (such as wood panels with long fiber structures, supporting fabrics, etc.) in both the face and core, as well as the incorporation of different geometric forms in the core, is recommended.