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The 2 major features of a submarine hull design that helps it withstand sea pressure at extreme depth is the material it's made of, and the design of the hull itself.
Spherical or round-shaped objects can withstand more pressure than other designs. This is why the Teardrop and Cigar shaped hulls of today were designed. The hull's material is also key - the more it can compress and expand, the less vulnerable it is to pressure. This is a problem with old Russian boats like the Alfa - they're made of Titanium. While it's very strong, it's not elastic, and every time it goes to deep depths it becomes more brittle with age.
Modern submarines, depending on the country, are made of either flexible steel, Titanium or GRP (Glass Reinforced Plastic). GRP boats are used by the Chinese, Titanium by the Russians. Most all other nations use flexible steel (the composition of which is classified) that compresses and expands with sea pressure as the boat descends or ascends through the depths. The steel used in pre-Seawolf class submarines was HY-80; The Seawolf and Virginia classes are using HY-100, which has a higher pressure rating.
Submarine decks are not actually attached to the inner pressure hull - they "float" by being suspended from cables. This is how the decks keep from getting crushed as the boat's hull compresses at deep depths, as the decks don't actually touch the sides of the inner hull.
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How can people withstand pressure in submarine?
A submarine is kept at, or close to, surface air pressure.
Why submarines are made of thick sheet of metal?
As a submarine submerges, it is subjected to a high volume of water pressure, which increases the further in depth the submarine goes. They have to be built to be able to withstand this pressure.
How much pressure can a submarine withstand?
It's totally dependent on the hull type, material construction, and overall design, but in general, just before a submarine reaches crush depth is as much sea pressure as it can handle.
Why are submarines built of hard thick sheet of metal?
Because they need to be able to withstand the pressure of the seawater outside. The deeper a submarine goes - the higher the pressure gets.
How do people enter and exit the submarine?
from the entrance :P +++ Through hatches designed to withstand the pressure of the sea water when submerged.
Why might a submarine be crushed if it sinks too low in the ocean?
Submarine hulls are subject to sea pressure, and that pressure increases the deeper the submarine goes. There are design limits to the amount of pressure that a hull can take, and if that pressure is exceeded by diving too deep, the hull will fail and will be crushed.
Why submarine made up of strong material?
A submarine is made from strong material so it can withstand the tremendous pressure at depths.
What pressure does a dive mask have to be able to withstand?
Enough to keep you from dying. After undergoing and extended research, no exact number was revealed for the pressure a dive mask must withstand. Although they obviously must withstand thousands of pounds of pressure due to the weight of the ocean water that one will be wading through.
Why is a submersible needed to descend to the bottom parts of the ocean?
A submersible has to be used, as it has been built specially to withstand the tremendous pressure in the deep ocean depths.
Why does the strength of a submarine hull have to be stronger than the hull of a ship?
because if a submarine goes under water to deep levels, it needs to hold against the air pressure. Yes the person said above.. They have to have a MUCH higher ability to withstand the pressure of the water pushing in against the hull of it.
How do you get into the submarine?
Through an air and water tight door called a hatch. These hatches are typically thick, round and rounded metal to withstand the sea water pressure at depth.
What vechile is used to explore the deepest parts of the ocean?
A submarine and probably an unmanned one at that due to pressure concerns.
