引伸计
铝
结构工程
灵活性(工程)
复合数
材料科学
有限元法
接头(建筑物)
剪切(地质)
螺栓连接
复合材料
工程类
数学
统计
标识
DOI:10.1016/j.ijfatigue.2021.106695
摘要
Bolted joints are potential fatigue critical points in lightweight aircraft structure. This paper presents a comparative study of fatigue behavior and flexibility of double-shear, aluminum–aluminum and aluminum-composite joint specimens in variable-amplitude loading. Similar failure mode and fatigue life of both specimen types were obtained by experiments and no indication of pretension loss was observed. A semi-empirical fatigue life prediction model was presented in correlation to the comparisons. Extensometer measurements showed decreasing flexibility, which was explained by increasing load transfer by friction and substantiated by comparative finite element analyses. The flexibility was significantly lower in aluminum–aluminum specimens.
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