Research Article

Research on the Numerical Calculation Method for Antiloosening Performance of Screwed Joints under Complex Working Conditions

Table 3

SJS parameters and ultimate loads.

Parameter nameParameter value
Shock absorber-body SJSCrossarm-subframe SJS

Outside diameter of thread, d (mm)1012
Pitch of the thread, P (mm)1.251.25
Lead angle, β (°)2.482.04
Clamping length, lk (mm)3094
Elastic resilience of the bolt, (mm·N−1)3.37 × 10−64.69 × 10−6
Elastic bending resilience of the bolt, βs (mm·N−1)7.03 × 10−71.49 × 10−6
Coefficient of friction in the thread, µG0.130.13
Clamping eccentricity, ssym (mm)−40
Elastic resilience of the clamped parts, (mm·N−1)1.39 × 10−61.92 × 10−6
Elastic bending resilience of the clamped parts, βp (mm·N−1)1.60 × 10−91.54 × 10−8
Friction radius at the clamped parts, ra (mm)18.513.6
Coefficient of friction at the interface, µT0.160.15
Number of force-transmitting interfaces, qF13
Number of torque-transmitting interfaces, qM13
Transverse load, FQ (N)51217028
Axial load, FA (N)5704253
Bending moment, MB (N·mm)3311672241
Torque about the bolt axis, MY (N·mm)46546948
Loading eccentricity, a (mm)1713.6
Load factor for concentric clamping and eccentric loading, 1.09 × 10−2
Load factor for eccentric clamping and eccentric loading, 7.85 × 10−2
Load factor for moment loading and concentric clamping, 1.03 × 10−2
Load factor for moment loading and eccentric clamping, 3.23 × 10−3