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对称复合材料层板面内和厚度方向泊松比的计算公式已经推出，本文设计制作了两组面内泊松比不同的复合材料层板，比较了它们的断裂韧性，发现泊松比小的一组材料比泊松比大的常规平衡复合材料的断裂韧性高。最后，通过观察断口形貌分析了原因。
The formulas for calculating Poisson’s ratio in-plane and in-thickness direction of symmetric composite laminates have been put forward. In this paper, two sets of composite laminates with different Poisson’s ratios in plane were designed and compared. Their fracture toughness was compared and the Poisson’s ratio The fracture toughness of a conventional balanced composite with a group of materials larger than the Poisson’s ratio is high. Finally, the reasons were analyzed by observing the fracture morphology.