Comments by "Ken Smith" (@kensmith5694) on "OceanGate Titan Hull - Glue Layers Were Breaking Down To Dust - No Clues." video.

  1. For this sort of duty at the least, the fiber should have been "wet" when it is put on. The idea is that you have a situation where everything is swimming in resin. You don't want even small air bubbles in the material. You also didn't cover the fiber directions. They put no angled fibers on. It was all 0 and 90 degree fibers.
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  2. At some point the fibers broke. By then the situation was already bad. The way this sort of thing fails is that the tube goes a little out of round. Think of the pressure pushing in on all sides of a circle. If it remains a circle all will be well. Now imagine the circle is a little out of round. The part where the curve is decreased from the normal curve of a circle is easier to push inwards
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  3. I do disagree with how the joint was made and also from tests I have seen, failures to tend to happen at points of transition.
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  4. That would have cost more but it might have worked better. I saw a thing where someone made engine parts out of JB Weld and they worked
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  5. A strong type of steel would have been good too and at a lower cost.
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  6. I think "wet winding" would have been the only way to go. If you do the winding with all air excluded and resin basically dripping off, the "voids" would not be full of air but rather have just a little less fiber in the resin.
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  7. The fiber makes the composite stiffer. Remember that the failure was not likely to be simple compression. Some part of the system went out of round It didn't crush to nothing. It was more like flattening a tube. Going out of round tends to be a process that feeds on its self. You want the material to be very stuff to fight this.
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  8. Yes a strong grade of steel or aluminum would likely have worked better. You need it to be stiff so 60 or 70 series aluminum would be needed
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  9. The company that made it likely didn't want the bad press.
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  10. I don't think that would have helped much. A support would need to be a disk of material with perhaps a good sized hole in the middle. A thin ring won't be stiff enough. Remember that a small motion is all it takes to get the full failure.
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  11.  @pocpic  I have built systems with composite pressure hulls. Metal was no allowed for technical reasons but expensive equipment was at risk. They did go deep and cycled many times.Composites can be very stiff for their weight.
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  12. Actually no. Composite pressure hulls are a bit of strange science. As you add layers, each new layer adds less and less additional strength even if the layers are perfect. With defects, it is worse.
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  13.  @klardfarkus3891  The pressure hulls I put electronics in have taken a great many cycles to quite deep in the ocean. Composites do work for the job.
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  14. The units don't matter in this case. Wrong is wrong in any system of measures
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