垂直度误差对复合材料单钉连接性能的影响

doi:10.7527/S1000-6893.2016.0133

Abstract

Abstract:

A single-lap single-bolt experimental study of quasi-isotropic lay-ups carbon fiber/epoxy laminates is conducted to assess the effects of perpendicularity error of hole on the bearing properties of composites in aerospace. The effects of the tilt angle, tilt direction of hole and bolt torque on the bearing properties of the joints are investigated by comparing the bearing strength, chord stiffness as well as 2% offset bearing strength. It is found that when the tilt angle of hole increases from 0° to 4°, the chord stiffness of joints increases from 10% to 40%, while the bearing strength of joints decreases by 9%-12%. The bearing strength of joints is not influenced by the tilt direction of hole. However, the chord stiffness changes about 20%-30% as the tilt direction of hole changes. Higher bolt torque can effectively improve the bearing strength of joints, but has little effect on chord stiffness. With the increase of the tilt angle of hole, the effect of the bolt torque on 2% offset bearing strength decreases.

Key words: composites, single-lap joint, bearing strength, perpendicularity error, bolt torque

CLC Number:

GAO Hang, WANG Jian, YANG Yuxing, LIU Xueshu, CHEN Lei, LI Rupeng. Effect of perpendicularity error of hole on mechanical behavior of single-lap single-bolt composite joints[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017, 38(2): 420183-420191.

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Effect of perpendicularity error of hole on mechanical behavior of single-lap single-bolt composite joints

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