In order to compare the damping characteristics of steel contact surface and rubber gasket surface in a bolted joint, by means of exciting of a impacting hammer, the accelerations of the upper part and lower part of a bolted joint and impacting force are simultaneously measured under the 4 levels of pre-tightening, then the dynamic parameters of the bolted joint are identified by linear fit of response curves according to a parameter model.
Based on the microscopic characteristics of contacting surface in bolted joint,the contacting types are classified as two tapes,that is,the peak-peak contacting and tangent peak-valley contacting. A dynamic model of axial vibration in bolted joint is presented.
The study focuses on the bearing strength of bolted connection in aluminum without pretension and precedes the parameter analysis with finite element program ANSYS,an analysis of the effects of edge distance,the diameter of bolt and the thickness of plate to the bearing strength. Two widely used aluminum alloys 6061-T6511 and 5083-H321 are examined.
The procedure quality concluding the following content: materials quality control, steel element manufacture quality control, meld quality control, high-strength bolt joint quality control, test assembling quality control, erection quality control, painting work quality control and fire prevention work quality control, etc.
Analysing many main factors that affect the load bearing capacity of high strength bolt joint,this paper offers a method of accessing the reliability of high strength bolt joint when achieving the maximum design allowable bearing power The feasibility of this method is tested with a specific example
This paper, based on 230 curves obtained from our tests of sigle-hole bolted joints in multidirectional laminates of cabon/epoxy, presents the view that the load correponding to the first peak in the P-δ plot in bolt joint test is taken as the allowable bearing load of design.