criterium geometry?
08-27-08, 08:56 AM
#26
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Reminds me of how alloy spars collapse at dock. The spars rock back and forth with negligible but constant low load, and then one day they just collapse. The thing I read on that said one had to consider light and heavy loads intermitently. And apparently that is a comon testing proceedure, though above my pay grade.
08-27-08, 11:34 AM
#27
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It's not technically "fatigue" in the metallurgical sense since you never ever really stress a frame close enough to its yield-strength to do work-hardening anyway. I suspect what happens is that the tubing themselves are fine, but you end up with lugs and brass that ends up with microscopic cracks. I've cut apart old steel frames and have found a lot of corrosion in the lugged joint itself where there once was full-contact with brass.
So yeah, old steel frames do get softer from A LOT of empirical evidence. However, HOW that softness develops is arguable and certainly is not metal "fatigue". "Frame fatigue" is a more accurate way to describe it perhaps.
So yeah, old steel frames do get softer from A LOT of empirical evidence. However, HOW that softness develops is arguable and certainly is not metal "fatigue". "Frame fatigue" is a more accurate way to describe it perhaps.
Road Fan
09-01-08, 02:20 AM
#28
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Anybody own a vintage Cambio Rino? By any chance one imported from Italy BEFORE Joe Gardin started making them in Toronto and messing them all up?
11-22-21, 01:23 AM
#29
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you've got a long and steep learning curve ahead - the slope of which is accentuated by your stance.
11-22-21, 02:36 AM
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Yes but facts are facts. They don't care if you call them "metallurgy" or not. They're still true. Your post was good advice but a legitimate quibble was raised: steel frames don't go soft in use.
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11-22-21, 07:41 AM
#32
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Half the people that were arguing in this thread are not here to defend themselves and the other half have blissfully forgotten about it in the last 13 years. So I'm closing it.
Materials wars are so 2008.
Materials wars are so 2008.
