| Citation: | YAN Lin, HU Dianyin, TIAN Tengyue, et al. Design and experiment of simulated specimen for fretting fatigue of turbine attachment[J]. Journal of Aerospace Power, 2024, 39（9）：20220606 doi: 10.13224/j.cnki.jasp.20220606
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A method was proposed to design the simulated specimen for fretting fatigue of turbine attachment based on the consistency of damage control parameters. Afterwards, a simulated specimen for the turbine attachment of a certain aero-engine was designed. Firstly, based on geometric similarity, two-dimensional structural dimension of the simulated specimen was determined by ensuring the consistency of the maximum relative slip distance and the equivalent stress distribution within the critical distance; and then, three-dimensional structural dimension of the simulated specimen was determined by optimization analysis with the objective of consistency of the stress intensity factor within the critical crack length. Finally, fretting fatigue test of the simulated specimen was performed. It was found that the crack was initiated at the edge of the contact surface, the direction of the crack growth was perpendicular to the contact surface and the crack length at fracture was within 5% in error with the simulation, thus verifying the rationality of the design method of the simulated specimen.
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