论文部分内容阅读
用0°纤维铺设的单向复合材料梁弯曲时易发生剪切破坏。本文提出了一种能承受较大弯曲负荷的复合材料箱形梁。其腹板用±45°纡维缠绕,上、下翼板用0°层纤维增强。並在棱条处局部加强。这样,可充分发挥复合材料抗拉、抗压强度高的优点,又不易发生剪切破坏。对±45°缠绕梁进行了实测应力分析,並按文中提出的确定棱条处应力的计算模式进行了数值计算分析。该箱形梁可望用作载重汽车的板簧悬挂系统。
Shear failure occurs when a unidirectional composite beam laid with 0 ° fibers is bent. This paper presents a composite box girder capable of withstanding large bending loads. Its web is wrapped with ± 45 ° 纡 dimensions, and the upper and lower wings are reinforced with 0 ° layers of fibers. And in the ribs locally strengthened. In this way, the advantages of high tensile strength and high compressive strength of the composite material can be fully exerted, and shear failure is less likely to occur. The measured stress of ± 45 ° wound beam was analyzed and the numerical calculation and analysis were carried out according to the calculation mode of stress in the rib. The box beam is expected to be used as a truck suspension spring system.