A Fretting Map Based on Fretting Evolution Mechanism to Divide Failure Modes
Based on the micro-motion damage mechanism and evolution mechanism,two non-dimensional normalized feature pa-rameters Qδ/(μPa)and σB/(μP0)were constructed.Taking 2024-T351 aluminum alloy as research object,orthogonal experimental research was conducted to establish a fretting failure chart.A multi-parameter loading fretting damage test system was designed.Finite element analysis was performed using Abaqus,the influence of force transmission errors and strain gauge position on parameter acquisi-tion during normal loading was explored.The feasibility of the test system was analyzed and verified.Subsequently,the fretting damage life and failure mode of specimens with two feature parameters as test parameters were studied.The experimental results indicate that using two non-dimensional normalized feature parameters Qδ/(μPa)and σB/(μP0)as x and y axes,fretting fatigue and fretting dam-age can be clearly distinguished within a certain range using the fretting failure chart,to characterize the material's failure mode.By changing one or more influencing parameters,fatigue failure can be transformed into wear failure,providing guidance for subsequent re-search on extending the fretting damage life of mechanical structures.
fretting fatiguefretting wearfretting failure chart2024 aluminum alloyfinite element analysis
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