复合材料环形夹芯柱的轴压性能试验及理论研究

采用高强玻璃纤维与泡桐木,通过先进的真空导入成型工艺,制备出具有高性价比的新型复合材料环形夹芯柱,可广泛应用于各种结构中的柱、支撑等。该夹芯柱以树脂浸渍玻璃纤维作为面层,以泡桐木作为芯材,其中泡桐木顺纹平行于轴向压力方向,以提供较大的轴向抗压能力。研究结果表明:复合材料环形夹芯柱在轴向压力作用下,为轴向强度破坏,其轴压极限承载力与面层和芯材的厚度有关,随着厚度的增大,承载力有所提高;随后推导出复合材料环形夹芯柱的强度破坏极限承载力公式;同时通过大型有限元软件ANSYS,对承受轴向压力的复合材料环形夹芯柱进行有限元模拟计算,理论分析结果与试验结果较吻合。

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.