在拉应力和应拉力交替的作用下，强度相对较低的螺栓会先产生裂纹，进而发生疲劳断裂。
Under the action of tensile stress and tensile stress, the bolt with relatively low strength will crack first, and then the fatigue fracture will occur.
设计了试验件和相应的夹具，开展了复合材料层合板螺栓连接结构的部件疲劳实验。
The specimen and corresponding fixture have been designed, and the fatigue experiment of composite component with bolted joint has been carried out.
此种结构一般采用螺栓连接，其连接处的疲劳特性往往决定了结构的使用寿命。
Most commonly, bolted joints are adopted to connect laminates to other structures, and the fatigue properties of joints affect the service life of jointed structures seriously.
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