Fatigue load detection method and residual fatigue strength detection method for vehicle adhesive joint

The invention relates to the technical field of vehicles, in particular to a fatigue load detection method and residual fatigue strength detection method of a bonding joint for a vehicle, and the fatigue load detection method of the bonding joint for the vehicle comprises the following steps: carrying out an acid-base aging test, an ultraviolet aging test and a high-low temperature alternating aging test on the bonding joint to obtain an aged bonding joint; obtaining a basic amplitude and a vibration intermediate value of a fatigue vibration test based on a range of shear force applied to the bonding joint; and based on the shear deformation angle and the vibration intermediate value, performing a fatigue vibration test on the aged bonding joint to obtain an average load. The method comprises the following steps: performing temperature aging and then superposing acid-base aging and ultraviolet aging to obtain different damage accumulations of a specific bonding joint in an external environment within a servic