Small things, e.g. insignificant rebellions, ah, gaps, do add up.
I see a problem in stress loads so. Titanium and carbon fibre composites behave differently under load. And at those depths, they are under a lot of load. These small differences induce additional stress at the critical joint between bulk heads and submarine body. That stress causes, over time, material fatigue.
That's why those components are, in most othee use cases, fatigue tested to their breaking point. Knowing that point, allows you to define a save service life for those components and replace thek way before they fail.
I see a problem in stress loads so. Titanium and carbon fibre composites behave differently under load. And at those depths, they are under a lot of load. These small differences induce additional stress at the critical joint between bulk heads and submarine body. That stress causes, over time, material fatigue.
That's why those components are, in most othee use cases, fatigue tested to their breaking point. Knowing that point, allows you to define a save service life for those components and replace thek way before they fail.