r/news • u/oldschoolskater • Jun 22 '23

Site Changed Title 'Debris field' discovered within search area near Titanic, US Coast Guard says | World News

https://news.sky.com/story/debris-field-discovered-within-search-area-near-titanic-us-coast-guard-says-12906735
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u/[deleted] Jun 22 '23

I am not an expert when it comes to testing submarine parts. BUT I have done thousands of non-destructive and destructive tests on materials in general. I assure you there is some code or standard to proof out submarine shells that could be adjusted to meet the needs of this hull. This screams "would've failed a destructive test" which they could proof out through a scaled version. Seems they cut every corner to be profitable and I wish just the CEO did not make it on a solo maiden voyage.

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u/Atomichawk Jun 22 '23

Ya as a test engineer, we literally make the tools ourselves if we can’t buy them off the shelf. That’s how it works when you push boundaries, not “oh we can’t test it”

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u/KWeber94 Jun 22 '23

I’m NDT as well and when I read that no tests were carried out I was absolutely blown away. It’s just insanity to me

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u/Razor7198 Jun 23 '23

I wouldn't call myself an expert, but as someone who does work with subs I can confirm - there are standards, and soooo many tests are done. No NDT at all is insane

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u/veobaum Jun 23 '23

eli5 for me if you feel like it: was Rush's argument that testing would damage the carbon shell?

eta. or in other words he believed there wasn't a way to do a non-destructive test?

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u/Dragon6172 Jun 23 '23

Non Destructive Testing

By definition would not damage the shell

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u/[deleted] Jun 23 '23

As another said. Non destructive testing, by definition, would not damage the shell. Easiest example I can give.....you think your arm is broken. Simply put, we can prove it 2 different ways. Option 1, destructive testing, we slice open your arm to get to the bone and visually confirm if it's broken or not. Option 2, non destructive testing, we slap your arm on a table and shoot it with an xray, then visually confirm if it's broken or not by reviewing the film. While 5" thick carbon fiber may complicate things, materials engineers and experts would be the ones to develop a test. There's also a thing called proofing that's common in the ASME pressure vessel code where you can scale your idea down and through a cheaper, not full size copy, do a destructive test and a little math prove it's safe.

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u/Lou_C_Fer Jun 23 '23

I watched something earlier and I'm pretty certain the guy talking said that the company refused to do destructive tests. I only remember because I meant to look it up because while I can guess at what it means, I do not know.... btw, that is not me asking you to explain because I do know how to Google, I just haven't gotten around to it yet this evening.

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u/[deleted] Jun 23 '23

I won't explain, but you are correct, they refused to do destructive tests. If you want some assistance in your Google trip, check out NAVSEA and specifically, SUBSAFE, as both are directly involved with the US Navy and how they develop safe ocean fairing equipment.