The main sections of the museum are listed below;
Tools of the trade, some ways to investigate problems;
Dye penetrant testing
of materials engineering terms
Fatigue cracks in steel cycle frame
on pictures below for larger image.
Click on linked text
for explanation of term or see glossary.
has a fatigue endurance
limit certain parts of the frame are stressed above this
limit and are prone to fatigue cracking. The rear triangle,
comprising the chainstays and seatstays are particularly vulnerable.
On the opposite side, the associated cracked
point had caused surface corrosion. Notice that the cracks had
occurred close to the brazed-on cross member. The heat
affected zone associated with brazing and welding usually reduces
the endurance limit and raises the chance of fatigue crack initiation.
investigation of the extent of the heat affected zone is in progress.
The manufacturers did not fulfil their "lifetime" guarantee
in this instance by suggesting that damaged paintwork caused
corrosion, which in turn initiated fatigue.