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Old July 9th 18, 03:42 PM posted to uk.rec.cycling
jnugent
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Posts: 11,574
Default Bent carbon frame?

On 09/07/2018 15:37, TMS320 wrote:

On 09/07/18 10:51, wrote:

Doesn't every material have an "elastic limit"?
After that it snaps, not deforms.


Every material has an elastic limit and a breaking strength. The
difference can go from nothing (china) to something very substantial
(steel).

It can also be directional. So concrete works under compression but not
under tension, carbon fibre works under tension but not compression.
Hence concrete usually has steel reinforcement and carbon fibres are
used in composites. Wood and steel can be used in both directions.

Steel work hardens after its elastic limit is reached and after the
excess load has been removed keeps its original strength. Work hardening
takes energy, making it good for crash absorption. Aluminium has little
or no work hardening.

Under cyclic loads below their elastic limit materials also have a
fatigue life: it is possible to design a steel part to never fail;
aluminium and concrete always have an end life.


The much-maligned Wikipedia is very useful, isn't it?
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