Hydrogen at 700 bar
A 700 bar hydrogen tank is a Type IV (plastic liner, metal boss, thick carbon wall) or emerging Type V (no liner). Its burst pressure must be about 2 to 2.25 times the working pressure depending on the standard, because what limits it in service is pressure cycling and long-term stress rupture of the fibre, not one overload.
Predict · at 0:42 in the video
A carbon hydrogen tank needs a burst pressure more than twice its working pressure. Why so much?
Not to survive one overload. To survive years of filling and emptying, and years of just sitting full. Carbon held at high stress for long enough can break without any extra load.
This course is our own. These books go deeper.
- Composite Filament Winding, S. T. Peters (ed.), ASM International, 2011
- Filament Winding: a Unified Approach, S. Koussios, Delft University Press, 2004
Simulations in this lesson are our own. Where a number rests on an assumption, the video marks it with an asterisk and says where it comes from.
