Jixie qiangdu (Jan 2016)
INFLUENCE OF THE FRICTION BETWEEN THE PLATES ON THE DETAIL STRESS OF AIRCRAFT TYPICAL JOINTS
Abstract
Based on the ANSYS software,this paper puts forward an accurate simulation method of applying the bolt pre tightening force to the interference fit joints of high locked bolt. By considering the bolt interference fitting,the bolt pre-tightening force,etc,the 3D finite element elastic-plastic model of the aircraft typical joint was established. The effect of the different plate friction on the maximum von mises of the dangerous part of the joint was calculated,and the variation law of the two points strain value was analyzed,then it was concluded the reason why the maximum von mises of the dangerous part of the joint changed. The result shows that with the increase of the coefficient of friction between plates,the maximum von mises presents the first decrease then increase. And this is due to the friction force between the plates on the load transfer and the upper and the lower free end of the joint tilted outward. The results of the analysis can provide reference for the finite element analysis and durability design of such joints.
