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mavic r-sys New Mavic r-sys wheelset
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so keep them in their bags when not using them - just like mavic say. that's why the bags come with the wheels! if you nick steel or aluminum spokes, they can break too! When I first heard about Mavic R-SYS wheels, I thought, they're Mavic, they're a totally inappropriate use of CFRP, they're a horrible, horrible idea
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mavic r-sys New Mavic r-sys wheelset
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there's three reasons we have tension on conventional spokes. 1. tension allows wire spokes to provide compressive support. 2. sufficient tension allows that support to be maintained. 3. sufficient tension allows that support to be maintained with sufficient integrity that spoke nipples don't unscrew. but, excess tension increases fatigue and decreases load capacity of the rim. and wheel strength does not increase as spoke tension rises above the minimum required for 1, 2 & 3. Without describing excess and minimum that statement is meaningless. just like undefined impact then? oh, wait, excess is defined by the rim manufacturer... oh well.
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mavic r-sys New Mavic r-sys wheelset
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You'd need to know the materials & layup to accurately predict the spoke behavior, yes. That's always the big unknown with composites. _meta_ls are much simpler. not when you know about them properly they're not! far from it. Sure, a composite spoke with bonded ends and unspecified material and layup is not more complicated than a length of 302 wire bent, headed and threaded. OK, I'm convinced. then you know nothing about crystallography, chemistry, microstructure, dislocation theory, deformation theory, fatigue or fracture mechanics.
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mavic r-sys New Mavic r-sys wheelset
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Also, don't nick the carbon spokes or else they will be severely weakened. According to our mavic rep. they have already had a few cases of broken carbon spokes which they are still trying to determine whether or not they were caused from nicks in the spokes. I would wait a year before investing in these wheels. Besides impact/nick damage, either fatigue may be a problem or the spokes may fail under high radial impacts (potholes) depending on the layup schedules. My guess is, to get the stiffness, they're using primarily uniaxial CF, so these spokes may be very brittle to impact loads. Perhaps the CF spokes may buckle first, it'd take an analysis to determine that. isn't it amazing how you can dig up relevant facts when you want to, and bullshit when you don't? I back up my claims with citations. You don't. er, i do, but you bleat about having to read them. bullshitter.
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mavic r-sys New Mavic r-sys wheelset
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then you know nothing about crystallography, chemistry, microstructure, dislocation theory, deformation theory, fatigue or fracture mechanics. And you do? From materials skool over 30 years ago no doubt?
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mavic r-sys New Mavic r-sys wheelset
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jim beam <
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wrote in message then you know nothing about crystallography, chemistry, microstructure, dislocation theory, deformation theory, fatigue or fracture mechanics. And you do? From materials skool over 30 years ago no doubt? do you mean mettalurgy school ? moron.
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