Fatigue life prediction method for CFRP-metal mixed bolt connection structure under competitive failure
A technology of fatigue life prediction and fatigue life, which is applied in the field of CFRP-metal hybrid bolt connection structure and fatigue life prediction of CFRP-metal hybrid bolt connection structure, and can solve problems such as competitive fatigue failure
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[0063] Example 1: Fatigue life prediction of CFRP-aluminum alloy two-nail double-shear connection structure
[0064] CFRP-aluminum alloy two nail double shear bolt connection structure such as figure 2 As shown, the middle plate is a CFRP laminate, and the two sides are aluminum alloy plates. The fastener bolts are made of Ti-6Al-4V titanium alloy, and a tightening torque of 5.0 N m is applied to the two fasteners.
[0065] The steps to implement fatigue life prediction are as follows:
[0066] 1. According to the structural parameters of the CFRP-aluminum alloy two-nail double-shear connection, a three-dimensional finite element model of the structure is established in the finite element software ABAQUS, and the free ends of the aluminum plates on both sides are completely constrained. In the 3D finite element model, contact pairs are defined on the contact surfaces of CFRP plate and aluminum plate, CFRP plate and fastener, and aluminum plate and fastener.
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