In this study, it was aimed to investigate the usability of sandwich panel technology as a frame material in order to decrease the weight of the frame material in the automotive sector while increasing the strength values of the chassis material. Carbon fiber, glass fiber polyester composites and aluminum plate were used as surface materials while aluminum honeycomb, polypropylene (PP) honeycomb and polyethylene terephthalate (PET) rigid foam were used as core materials. Surface composite materials are produced by wetting the glass and carbon fibre fabrics using polyester resins in layers by hand lay-up and compression method. It was provided that the plates completed their curation with a cold pressure at 50 bar for 720 minutes. The sandwich composites were produced by combining the surface and core materials with epoxy adhesive tape and holding under the hot pressure at 90 degrees C for 30 minutes and 120 degrees C for 60 minutes at 3 bar pressure. According to the standards of produced sandwich panel composites; bending, flatwise and edgewise in the direction of the compression samples were taken and subjected to bending and compression experiments. According to obtained experiment results; it was determined that core material is the more significant changes on the mechanical properties compared to surface materials. As a core material it was proven that Aluminum honeycomb core materials show the highest results in terms of bending and edgewise compression strength while PET core materials show highest results in terms of flexural stiffness and flatwise compression strength. However, it was seen that the panels with PP honeycomb core demonstrated considerably more elongation values than those of the other panels.