Abstract
The emergency break-away technology of civil aircraft is particularly important to the safety of aircraft, and the fuse pin is the key to the realization of emergency break-away technology. A type of civil aircraft pylon fuse pin was taken as the research object. Firstly, the finite element structure model of the fuse pin was established by ABAQUS, and the explicit dynamic algorithm was used to study the break-away process and load of the fuse pins. Secondly, the shear failure test of the fuse pin was designed to verify the accuracy of the finite element model. Finally, the influence of the diameter-thickness ratio on the failure mode and load of the fuse pins was studied. Comparing the failure load with the theoretical value, it can be concluded that the simulated and theoretical values of the failure load of the fuse pins were in good agreement under a certain range of diameter -thickness ratio, which provided references for the selection of the real fuse pins.
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