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高学敏,等:基于ABAQUS软件的螺栓连接疲劳行为及寿命预测
图 9 多螺栓搭接结构被劳损伤演变过程
4 结论 distribution for threaded connection[J].Chinese Journal
of Mechanical Engineering,2009,22(6):869.
(1)载荷频率显著影响螺栓连接的疲劳寿命。高
[4] PAI N G,HESS D P. Three-dimensional finite element
频疲劳载荷(100 Hz)会使材料在较短时间内经历
analysis of threaded fastener loosening due to dynamic
大量应力循环,加速疲劳损伤累积,显著缩短材料 shear load[J].Engineering Failure Analysis,2002,9(4):
的疲劳寿命。因此,在设计中应避免高频载荷条 383-402.
件,以延长螺栓连接的疲劳寿命。 [5] HOUSARI B A,NASSAR S A.Effect of thread and
(2) 多螺栓搭接结构在疲劳寿命上表现出显 bearing friction coefficients on the vibration-induced
著优势。由于载荷在多个螺栓之间均匀分布,单 loosening of threaded fasteners[J].Journal of Vibration
个螺栓的应力集中效应减小,整体结构刚度提高, and Acoustics,2007,129(4):484-494.
微动磨损减少,从而延长了螺栓的疲劳寿命。 [6] MAGGI Y I,GONÇALVES R M,LEON R T,
et al.Parametric analysis of steel bolted end plate
(3)螺栓连接的疲劳损伤主要集中在螺杆中部、
connections using finite element modeling[J].Journal of
螺纹处以及螺栓头部与杆部的过渡区域。这些高应
Constructional Steel Research,2005,61(5):689-708.
力集中区域是疲劳裂纹萌生和扩展的主要位置。在
[7] ZHANG Z,XIAO Y,XIE Y H,et al.Effects of
疲劳载荷作用下,裂纹逐渐扩展,最终导致螺栓发生
contact between rough surfaces on the dynamic responses
剪切断裂。 of bolted composite joints:Multiscale modeling and
numerical simulation[J].Composite Structures,2019,
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