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提出一种新型的复合材料成形工艺,即热冲压成形,来直接成形复合材料。为了研究复合材料板的成形行为,分析了成形温度对零件的影响,进行了热弯曲和热拉深实验。实验结果表明,编织复合材料板的锁止角为30°,在成形过程中,变形载荷一般小于5 N,并且变形载荷随着温度的升高而降低。成形碳纤维复合材料板的最佳温度是170°C。采用有限元分析软件ABAQUS对模具的温度场分布和复合材料板的变形进行了数值模拟。为了研究碳纤维在成形过程中的运动,采用两节点的三维Truss单元T2D3对纤维进行网格剖分,模拟结果与试验结果相吻合。
A new type of composite material forming process is proposed, that is, hot stamping to form the composite directly. In order to study the forming behavior of the composite plate, the influence of forming temperature on the part was analyzed and the hot bending and hot drawing experiments were carried out. The experimental results show that the braided composite plate has a locking angle of 30 °, and the deformation load is generally less than 5 N during the forming process. The deformation load decreases with increasing temperature. The best temperature for forming carbon fiber composite panels is 170 ° C. The finite element analysis software ABAQUS was used to simulate the temperature field distribution and the deformation of the composite plate. In order to study the movement of carbon fibers in the forming process, a two-node three-dimensional Truss unit T2D3 was used to mesh the fibers. The simulation results are consistent with the experimental results.