EXPERIMENTAL AND THEORETICAL STUDY OF COMPOSITE SANDWICH COLUMN UNDER AXIAL COMPRESSION

Using the high-strength fiberglass and paulownia wood，through advanced vacuum infusion molding process，a cost-effective new composite sandwich column was prepared． Taking the resin infusion fiberglass as face， and the paulownia wood as the core， the texture of paulownia wood parallels to the direction of axial pressure for providing large axial compressive strength． The study results show that a failure of axial strength occurs in the composite sandwich column under axial pressure． The ultimate bearing capacity of the composite sandwich column under axial pressure is related to the thickness of the face and the core，which is raised with the increase of the thickness of the face and core． A formula of ultimate bearing capacity of the composite sandwich column was deduced． Through large-scale finite element software ANSYS，FE simulation of the column was carried out，and the theoretical，the analysis result tallied with test result．