• Isn't it more the case that because there are a lot of parts that are kinematically constrained (though in complicated ways), the entire system (once you take into account the spokes) becomes massively overdetermined

    Yes, if you simplify your model to fix all the joints and treat the materials as inelastic, and as you say if you model it realistically you have to consider that the shape changes under load, and that alters the way the load distributes among the different components. A radially-laced front wheel is neither circular nor radially laced once you load it, whether that's rim brake loads or just pushing down on the axle and up on the tyre contact patch.

  • Yeah, those were called 'second-order effects' when I studied this kind of thing (in a civil engineering context though, and that was in German, so might be called something else in English). If I remember correctly, unless the deformations go beyond a certain limit, it doesn't impact the overall load distribution that much though. The thing is that here, a full model is already difficult to 'solve' fully for a rigid wheel.

  • unless the deformations go beyond a certain limit, it doesn't impact the overall load distribution that much though

    A wheel designed to be only just up to the job will have the spoke tension drop to zero for at least one spoke under maximal load condition, unless the maximal load causes the tension of at least one spoke to rise to the yield point. A perfectly designed wheel will have at least one spoke at zero tension and at least one spoke at the yield point under maximal load condition 🙂

About

Avatar for SwissChap @SwissChap started