World News

22096 readers

225 users here now

Breaking news from around the world.

News that is American but has an international facet may also be posted here.

Guidelines for submissions:

Where possible, post the original source of information.
- If there is a paywall, you can use alternative sources or provide an archive.today, 12ft.io, etc. link in the body.
Do not editorialize titles. Preserve the original title when possible; edits for clarity are fine.
Do not post ragebait or shock stories. These will be removed.
Do not post tabloid or blogspam stories. These will be removed.
Social media should be a source of last resort.

These guidelines will be enforced on a know-it-when-I-see-it basis.

For US News, see the US News community.

This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.

founded 2 years ago

MODERATORS

132

AP News: A search is underway for missing submarine that takes people to see Titanic (apnews.com)

submitted 2 years ago by philz@beehaw.org to c/news@beehaw.org

97 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] StringTheory@beehaw.org 7 points 2 years ago (1 children)

Made out of a fiberglass tube (catastrophic failure) and titanium end caps (cracks) instead of steel.

“Steel is real.”

[–] Lowbird@beehaw.org 2 points 2 years ago (3 children)

Titanium cracks under pressure, I take it?

Or is the join between the cap and the fiberglass body potentially more of a problem?

[–] rustyspoon@beehaw.org 8 points 2 years ago

Everything cracks under pressure, I'm not exactly sure what the above commenter is getting at. If the sub was steel the walls would be thinner. With titanium the walls are thicker. Without knowing the dimensions of the material we can't know whether it was built to high enough standards.

[–] ZapBeebz@beehaw.org 7 points 2 years ago

I mean, anything will crack under pressure. The biggest issue I see is uneven compression of the two materials coupled with different fatigue behaviors. I'd feel a lot safer if the whole submarine was titanium, honestly. Barring that, a couple inches of solid steel would be just as comforting.

[–] StringTheory@beehaw.org 4 points 2 years ago (2 children)

I would be worried about both. Joining two very different materials that need to deal with crazy pressures seems like a really bad idea.

[–] BongRipsMcGee420@lemmy.one 3 points 2 years ago

bUt iT wAs dEsIgNeD wItH NASA iNpUt

[–] leftascenter@discuss.tchncs.de 1 points 2 years ago

Add temperature changes as you dive.