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Effect of wear debris on fretting fatigue crack initiation

Friction 2022年第6期10卷 927-943页

作者： Shengjie WANG Tongyan YUE Dagang WANG Magd ABDEL WAHAB Soete Laboratory Department of Electrical EnergyMetalsMechanical Construction&SystemsFaculty of Engineering and ArchitectureGhent UniversityGhent 9052Belgium State Grid Xinyuan Maintenance Branch Beijing 100000China School of Mechatronic Engineering China University of Mining and TechnologyXuzhou 221116China Faculty of Engineering Van Lang UniversityHo Chi Minh City 700000Vietnam Soete Laboratory Ghent UniversityGhent 9052Belgium

Both wear and fatigue occur in fretting condition,and they interact with one another during the whole *** fatigue is commonly analysed without considering the effect of wear in partial slip regime,although wear affects the lifetime of crack *** paper investigates,for the first time,the effect of wear debris on fretting fatigue crack *** investigate the effect of debris,first fretting wear characteristics in partial slip regime are analysed for loading ***,the effect of wear on fretting fatigue crack initiation is investigated using Ruiz parameters and critical plane methods without considering the debris *** the results,we can see that loading conditions affect the wear profiles in different ***,wear has a significant effect on the fatigue in partial slip regime without considering debris especially on the crack initiation ***,considering wear debris in the analysis,its effect on critical plane parameters is *** is found that by considering the wear debris effect,the frtting fatigue crack initiation location is shifted towards the trailing *** predictions of both crack initiation location and lifetime show a good agreement with the experimental data.

关键词： fretting wear fretting fatigue critical plane Ruiz parameter debris

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LIFE PREDICTION APPROACH FOR RANDOM MULTIAXIAL FATIGUE

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Chinese Journal of Mechanical Engineering 2005年第1期18卷 145-148页

作者： WangLei WangDejun SchoolofMechanicalEngineeringandAutomation NortheasternUniversityShenyang110004China

According to the concept of critical plane, a life prediction approach forrandom multiaxial fatigue is presented. First, the critical plane under the multiaxial randomloading is determined based on the concept of the weight-averaged maximum shear strain *** the shear and normal strain histories on the determined critical plane are calculated and takenas the subject of multiaxial load simplifying and multiaxial cycle counting. Furthermore, amultiaxial fatigue life prediction model including the parameters resulted from multiaxial cyclecounting is presented and applied to calculating the fatigue damage generated from each ***, the cumulative damage is added up using Miner's linear rule, and the fatigue predictionlife is given. The experiments under multiaxial loading blocks are used for the verification of theproposed method. The prediction has a good correction with the experimental results.

关键词： Multiaxial fatigue Random loading Life prediction critical plane Cyclecounting

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