空军工程大学学报2025，Vol.26Issue(1)：18-25,8.DOI:10.3969/j.issn.2097-1915.2025.01.003
L型钛—铝角片螺栓对接结构静态拉伸力学性能
A Study of Static Tensile Mechanical Properties of Bolted Joints with L-Shaped Ti-Al Curved Laminate
摘要
Abstract
In order to research the effect of bolt eccentric distance and install direction on static tensile be-havior of bolted joints with L-shaped Ti-Al curved laminate,the researches are adopted by the experimen-tal and numerical methods.A test is accomplished on 7 sets of specimens with 3 groups(i.e.pure tension bolted,up bolted and down bolted)divided.The test results demonstrate the average collapse load and mode of group A respectively.The Influence of eccentric distance and installation direction on mechanical behavior of bolted joints is investigated by group B、C.FEMS are proposed by ABAQUS to reproduce the test results of the above-mentioned groups.Through Johnson-Cook,the plastic and failure criteria of the bolt are developed.The stiffness,failure mode and collapse load obtained by FEM method are in good agreement with the experimental results.Besides,the FEM can clearly describe the starting position and expansion process of bolt breakage.According to the experimental and numerical research,the failure load of butt-bolted joints is much lower than that of the bolt pure tension group due to the additional bending moment,and the ultimate loads decrease with the increase of eccentric distance.Furthermore,the ulti-mate loads of down bolted are slightly higher than that of the up bolted while comparing specimens with the same eccentric distance.The failure mode of group A and C is bolt cross-section fracture(type Ⅰ),while the failure mode of group B is bolt head curling failure(type Ⅱ).This study has a certain of guiding significance for the design of bolted joints with L-Shaped curved laminate.关键词
L型角片/螺栓连接/偏心距离/安装方向/失效模式/数值仿真/模型Key words
L-shaped curved laminate/bolted joints/eccentric distance/install direction/failure mode/nu-merical simulation/Johnson-Cook model分类
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郭轩,张引利,刘彦杰,刘洪权,惠战荣..L型钛—铝角片螺栓对接结构静态拉伸力学性能[J].空军工程大学学报,2025,26(1):18-25,8.基金项目
国家重大科技专项 （）
