A finite element/contact mechanics formulation is used to analyze the dynamic tooth forces that arise from damage-induced vibrations in spur gear pairs. Tooth root crack damage of varying sizes are analyzed for a wide range of speeds that include resonant gear speeds. The added localized compliance from tooth root crack damage leads to a re-distribution of the forces on the individual gear teeth in mesh. At speeds away from resonance, smaller dynamic forces occur on the damaged tooth and larger dynamic forces occur on the tooth that engages immediately after it. These dynamic tooth contact forces cause additional transient dynamic response in the gear pair. For certain speeds and sufficiently large tooth root cracks, the damage-induced dynamic response causes large enough vibration that tooth contact loss nonlinearity occurs. For some speeds near resonance, the damage-induced vibrations cause teeth that normally lose contact to remain in contact due to vibration. Tooth contact loss nonlinearity in this cause briefly seizes but then occurs again after several mesh cycles when the damage-induced transients diminish. The features of the dynamic tooth loads shown in this work may be used in analyses that predict the propagation of damage, determine conditions that will likely cause healthy teeth to become damaged, and give insight into the fundamental mechanisms driving vibration in damaged geared systems.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Damage-Induced Dynamic Tooth Contact Forces in Spur Gears with Root Cracks


    Additional title:

    Sae Int. J. Adv. and Curr. Prac. in Mobility


    Contributors:

    Conference:

    WCX SAE World Congress Experience ; 2022



    Publication date :

    2022-03-29


    Size :

    10 pages




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Tooth Mesh Modeling of Spur Gears with Tooth Root Crack Damage Using a Finite Element/Contact Mechanics Approach

    Hood, Adrian / Cooley, Christopher / Wang, Yaosen | SAE Technical Papers | 2021


    Dynamic Tooth Loads for Spur Gears

    Cornell, R. / Westervelt, W. | NTRS | 1986