Bent Fork Tube!
- Thread starter ztkAZ
- Start date
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Kieran Mayhew
Guest
The cool shit is that Karl will probably set you a completely new set with no hassle.
Chris Picone
Member
That's not really true. Brittleness and yield strength do vary with the quality of material but ultimately the type of failure depends on the loading and the alloy of material.
Since both failure modes take the part in question out of commission, they're pretty much equally bad. If a part is designed so that it snaps rather than bends at the same loading to saves weight or money, it's basically worth it.
I'd say bars are a different story though - bending is obviously better there.
Engineering is all about tradeoffs.
vertx scooters
Member
Chris,
One big factor you left out in controlling failure modes is the state of the material involved. You can have the exact same material residing in different states and get opposite ends of the spectrum load failures. Lot's of variables involved!
Also, you defintely want an elastic "bend" failure on a fork. If you think about it there is no difference to it than bars. if your fork tube snaps or your bars break the result is the same - loose piece of metal in your hands
Not good! So cutting corners here is not "worth it"
One big factor you left out in controlling failure modes is the state of the material involved. You can have the exact same material residing in different states and get opposite ends of the spectrum load failures. Lot's of variables involved!
Also, you defintely want an elastic "bend" failure on a fork. If you think about it there is no difference to it than bars. if your fork tube snaps or your bars break the result is the same - loose piece of metal in your hands
Not good! So cutting corners here is not "worth it"
ztkAZ
Member
Chris,
One big factor you left out in controlling failure modes is the state of the material involved. You can have the exact same material residing in different states and get opposite ends of the spectrum load failures. Lot's of variables involved!
Also, you defintely want an elastic "bend" failure on a fork. If you think about it there is no difference to it than bars. if your fork tube snaps or your bars break the result is the same - loose piece of metal in your hands
Yeah, Brand new blunt bars bent, And good condition Vmax fork
But now i need new bars, and i just spent 80 on these. Life sucks. And i sent karl an email please reply.Chris Picone
Member
Very true!
Also, you defintely want an elastic "bend" failure on a fork. If you think about it there is no difference to it than bars. if your fork tube snaps or your bars break the result is the same - loose piece of metal in your hands
Aren't chromoly and aluminium all very inelastic materials?
instinctscooter
Silver Member
well it shows that vertx owns blunt but everyone already know that.
cralle
Bronze member
Chromoly is more elastic since bars and forks made of steel usually have to be bent back and forward alot before they fatigue and snaps off.
Aluminium isn't as forgiving since it usually always just snaps clean when it doesn't wanna play anymore
Forks made of aluminium are fine as long as they have a thick forktube but for bars it feels really sketchy...
Nick Baker
Bronze member
cralle
Bronze member
Still steel even though it's harder so what is the point of what you are saying?
Snyder: ?
Chase Marsh.
Bronze member
Bent forktubes ftw!
instinctscooter
Silver Member
^ anyway he didnt bend his forktube, he bent his bars chase
Chase Marsh.
Bronze member
Bent bars, FTW!