#Thea render carbon fiber crack#

No, carbon failure is NOT 'always' spectacularly catastrophic.but in a hellova lot of the incidents it is. The real compressive strength, determined by extrapolating a linear relationship between the estimated compressive strength and the radial compressing force, is approximately 25Гўв‚¬вЂњ60% of tensile strength for PAN-based fibers, while it is approximately 10Гўв‚¬вЂњ35% for pitch-based fibers.' This decrease in compressive strength may be accounted for by a decrease in the radial compressing force. The estimated compressive strength of carbon fibers decreases with increasing temperature in a temperature range from room temperature to 100Г‚вЊ. 'Efforts were made to estimate the axial compressive strengths of carbon fibers from the fiber fragment lengths produced by subjecting to a strain greater than the fiber ultimate strain for PAN-based and pitch-based carbon fibers. The compressive strength of carbon fiber is.not so much. Yield to destruction is often a fairly tame event when compared to carbon. Steel/Titanium/aluminum has decent strength in tension and compression. No offense to the Doc, but I don't think the CF repair kit will bring back the structural strength of the damaged fibers. This has greatly reduced the CF's ability to resist torsion and flexion. To make anything made from carbon fiber stiff in a variety of directions, the CF cloth is laid up in different directions before molding it in epoxy.ДЇrom the damage you described, that 2-inch piece of chainring embedded itself into the frame and cut some of the carbon fibers. It is very strong - but only in one direction (unidirectional weaving). Secondly, carbon fiber is a high-tensile strength material. Bike manufacturers have gone great lengths to beef up that area to increase frame stiffness/rigidity (BB30 anyone?). The pedaling and rocking motion on the handlebars of the rider flexes and twists the frame from the headtube to the BB shell thru the downtube. This is a high-stress point on the bike, especially when pedaling out of the saddle as in a sprint or during climbs. I wouldn't attempt to repair the frame, especially if the damage is what you described.ДЇirstly, the damage is at the bottom bracket shell/downtube. Anyway, my issue is what to do with the old frame? Is there a way I can repair it myself? Or would it be better to sell it on to someone who might be happy to fix it and use it? Should I repair it myself and hold off on getting the $1300 replacement frame? Seems like such a loss of money since I'll be getting back the same bike as before in essence. Now this kind of problem isn't naturally covered on the warranty so I have been given the option to pay for the replacement Cadent frame which will cost be around $1300. See the link: ДЄs you can see it is right at the base of the frame.

#Thea render carbon fiber crack#

The white crack indicates the approximate size of the crack which has gone right through into the middle of the frame. I have done a photoshop mockup of the location and approximate size of the crack on one of the avanti black frames as I don't have any photos of it. That would be fine if that was the only problem, but it turned out that a small 2 inch piece of the chain ring broke off and lodged straight into the carbon frame, creating a thin hole about half an inch wide right at the base of the frame. I stopped and noticed that the front inner chain ring had snapped in half! As a matter of fact, what had happened is that a few of the bolts holding the inner chain ring on had obviously worked themselves loose over time (something I hadn't even thought to check regularly) and so eventually the chain ring had too much pressure (on the hill) and simply buckled and cracked. Yesterday I was loading up my Avanti Cadent 3.0 2010 roadie on a steep hill and all of a sudden I heard a *crack*.