, MA A. Carbon fiber B. Buckling

xpe wic y, th ush od made of fiber reinforced composite. The response of the sandwich panels under axial compression was y cores lattice rgence ension are attractive for building ultra-light, high strength components, specifically for the aerospace industry and for flight structures [12–20]. Compared to metal sandwich panels, studying the behavior of composite sandwich panels is more challenging due to the com-plex, and generally highly anisotropic, behavior of the composite. Most of the studies on the mechanical response of composite In Section 2, we derive analytical expressions for the failure load of composite sandwich columns under in-plane compression by expanding the previous analytical work on metal sandwich col-umns with pyramidal truss cores [21] and sandwich columns made of glass fiber reinforced epoxy face sheets with PVC polymer foam cores [22,23]. In the experimental part of the study, we first manufactured carbon fiber composite pyramidal truss cores using the hot-press molding technique described in our recent published work [18]. In this method, all the continuous fibers of the composite are aligned in the direction of struts and thus the truss structure ca