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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。
Using high-strength glass fiber and paulownia wood, through the advanced vacuum induction molding process, a new type of composite ring core sandwich column with high performance-price ratio is prepared, which can be widely applied to columns, supports and the like in various structures. The sandwich column is made of resin-impregnated glass fiber as the surface layer and paulownia wood as the core material. The paulownia wood grain is parallel to the axial pressure direction to provide greater axial compressive capacity. The results show that the composite ring mandrel is damaged by axial compression under axial pressure, and its ultimate bearing capacity is related to the thickness of the surface layer and the core. As the thickness increases, the bearing capacity Then deduced the formula of ultimate strength of ultimate strength of the composite ring core column. At the same time, through the finite element software ANSYS, the finite element simulation calculation was carried out on the annular composite core column subjected to axial compression. The theoretical analysis results and tests The results are more consistent.