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Modern submarines rely on their hull design and material construction to deal with extreme pressures in the ocean while submerged. Most NATO countries use a flexible, compressible steel alloy that allows the hull to compress and expand as the submarine goes deep and shallow. The decks aren't actually connected to the hull - if they were, they'd be severely damaged as the boat goes deep. They're actually suspended by cables, the sides of the decks several inches from either side of the hull to prevent contact.
Not all submarines use this type of construction, and it can be a problem later down the road in the life of the boat. For example, the Russians have used Titanium to construct some of their boats. While strong and allowing them to go deeper, Titanium isn't flexible, and over time under repeated pressures it will become brittle. Others like China use GRP (fiberglass) to construct their boats. The problem with having non-flexible material is the egg-shell effect - egg shells are strong, but under enough repeated pressure they become brittle because they cannot compress and expand.
A spherical based design is also the strongest for extreme pressures, and why virtually all modern submarines are based on a cigar or teardrop shaped hull design.
The Russians use titanium to manufacture the pressure hulls of their submarines. The Chinese use a material called glass-reinforced plastic, and the U.S. and most other countries use a steel alloy that is specially designed to withstand the cyclic stress that it experiences when it is subjected to the wide range of pressure changes during submerged operations. Cyclic stress is the same type of stress that you put on a piece of wire or plastic when you bend it back and forth. It is almost impossible for a human to pull apart a steel clothes hanger, but if you bend it back and forth several times, the metal will weaken at the point of the bend and eventually fail.
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Why submarines are built with hard thick sheets of metal?
To withstand the external pressure.
Why cannot submarines go in deepest parts in oceans?
As submarines go deeper they are surrounded by more and more pressure from the water arround them. There are not currently any submarines that can withstand that amount of water pressure.
Why are submarines built of hard thick sheets of metal?
To withstand high water pressure when they are submerged at sea.
Why are submarines strong?
because they have to withstand the pressure of the water when they go down under water. and to keep the people safe :)
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.
Can you convert air pistol to 22 caliber rimfire?
No. Air pistols are not designed to withstand the pressure generated by gunpowder.
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.
Why do submarines have to be strong?
Submarines would need thick, strong walls because They would have to withstand the pressure of the water that would increase the deeper they go, to do this they would need stronger and thicker materials to cope with the force (This would help keep the people safe).
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.
How do submarines withstand deep sea pressure?
The simple explanation of the ability of a submarine to withstand deep sea pressure lies in the mechanical strength of the pressure hull. On modern military submarines (called boats by the crews) the pressure hull is make of steel (except in the case of a few Russian boats which used titanium). This steel basically forms a cylinder and keeps the pressure of the sea water at operating depth from crushing the hull. To gain a tactical advantage, the Russian Navy built some of their boats with titanium pressure hulls. These hulls were designed to allow greater operating depths, and, therefore, increased ability to "hide" beneath the sea. But as is the case with the steel hulls, the titanium hulls used the geometry (shape) and the mechanical strength of the pressure hull and all the fittings to keep the water out at test depth.
Why is it dangerous to heat the canned food before opening up the can?
The can can explode; they're not designed to withstand the pressure of steam forming inside.
What is difference Between Vessel Column?
Pressure vessel is designed to withstand circumferential load,known as Hoope Stess, but column takes the axial load.
