Titan Taken Out?

[2busy]

 

[HFS]

Some people have theorized it was sunk by a bad case of hubris.

 

[ConstitutionCowboy]

What in the wide, wide world of sports does standing a string on end have to do with modern composites?

Composites are made out of fibers. Stand a fiber on its end and it will bend over under its own weight. Its tensile strength is a whole 'nother matter. Composites get their strength from the tensile strength of the fibers.

Woody

 

[SoonerP226]

Composites are made out of fibers. Stand a fiber on its end and it will bend over under its own weight. Its tensile strength is a whole 'nother matter. Composites get their strength from the tensile strength of the fibers.

Woody

Yeah, but you're comparing two very different materials with very different properties. If you take that string and impregnate it with resin and cure it under pressure, it'll not just stand up, it'll support a good deal of weight. And if you weave it into a fabric, build up layers of that fabric, impregnate it with resin, and cure it under pressure and in heat, it will hold up fantastic amounts of weight.

 

[dennishoddy]

https://townhall.com/tipsheet/mattv...-waited-to-reveal-titanic-sub-deaths-n2624889

They mobilized as a training exercise even though they knew it imploded. The sad part is that the families waiting for a miracle to happen had to suffer for three days. Despicable.

 

[Shadowrider]

Yeah, but you're comparing two very different materials with very different properties. If you take that string and impregnate it with resin and cure it under pressure, it'll not just stand up, it'll support a good deal of weight. And if you weave it into a fabric, build up layers of that fabric, impregnate it with resin, and cure it under pressure and in heat, it will hold up fantastic amounts of weight.

Class 3 & 4 CNG tanks are made out of carbon fibre. They fill to standard working pressure of 3600 PSI. There was something else with the design. Google "David Lochridge" He was the one fired for raising concerns and not going along with the lead engineer on hull monitoring vs. the hull testing that should have been done. NDAs and waivers or not this company should be litigated into oblivion. 5 people got killed over some pretty basic safety practice and a company's desire to cut corners winning out.

 

[SoonerP226]

Class 3 & 4 CNG tanks are made out of carbon fibre. They fill to standard working pressure of 3600 PSI.

Yeah, building pressure vessels out of CF isn't exactly an unknown science. I saw an article about hydrogen tanks made out of CF that are designed to withstand 850 bar of pressure (3600psi is roughly 248 bar), and the pressure at Titanic's depth is in the neighborhood of 370-380 bar.

 

[ConstitutionCowboy]

Yeah, but you're comparing two very different materials with very different properties. If you take that string and impregnate it with resin and cure it under pressure, it'll not just stand up, it'll support a good deal of weight. And if you weave it into a fabric, build up layers of that fabric, impregnate it with resin, and cure it under pressure and in heat, it will hold up fantastic amounts of weight.

What you say is true, but it obviously wasn't enough for Titan.

Woody

 

[ConstitutionCowboy]

Yeah, building pressure vessels out of CF isn't exactly an unknown science. I saw an article about hydrogen tanks made out of CF that are designed to withstand 850 bar of pressure (3600psi is roughly 248 bar), and the pressure at Titanic's depth is in the neighborhood of 370-380 bar.

Internal pressure and external pressure are two different things with different sets of physical requirements regarding structural integrity.

Woody

 

[SoonerP226]

What you say is true, but it obviously wasn't enough for Titan.

Woody

True enough, but the failure of a material doesn’t mean it was the wrong material for the job—even the perfect material will fail if your design or your construction methods are bad or if you don’t do the maintenance. Pine 2x12s make an awesome joist under the floor of a house, but if you start cutting 8” holes in it to run plumbing through it, it’s eventually going to fail.