Structural Stability Concerns

Discussions center on the mechanical strength, stability, and load-bearing capacity of innovative structures such as deployable bridges, towers, pyramids, and launch infrastructure, with skepticism about their ability to handle self-weight, tension, compression, earthquakes, and other stresses.

📉 Falling 0.4x Hardware
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Keywords

e.g TLDR IANA ILS youtube.com tension weight cables material load structure structural plates structures compression

Sample Comments

robinduckett • Oct 22, 2021 • View on HN

Maybe too heavy to support its own weight?

6gvONxR4sf7o • Dec 14, 2021 • View on HN

The issue is probably the strength of the structures involved.

LargoLasskhyfv • Oct 15, 2021 • View on HN

You have a honey-comb structure. Maybe put exactly fitting X-shaped stabilizers into them, before. For safety, and such :)

jacquesm • Nov 15, 2014 • View on HN

Mechanically stronger too! (it would be mostly under tension)

CGamesPlay • Aug 13, 2022 • View on HN

It feels like it would snap under its own weight well before that, though, unless it was suspended from multiple points.

esotericn • Apr 21, 2019 • View on HN

Something doesn't add up to me.The structures here basically exploit moments in order to move them. But there's nothing giving them stability once they are 'static'. Surely the end piece of the bridge could just fall over if you stood on the edge of it?

mLuby • Dec 20, 2017 • View on HN

Any idea why that is? I could imagine that its structure being incapable of handling the additional mass.

foota • Aug 5, 2017 • View on HN

I'm not a real engineer, but most structures don't have the ability to flex like this tube could.

hadlock • Jun 24, 2023 • View on HN

The design flaw was that they used a construction material strong in tension, but weak in compression. For a task that is almost entirely compression. On a vehicle that has no need for weight savings. Also in a couple photos looks like they have drilled and screwed a monitor mount directly into the pressure vessel, creating future failure points, rather than gluing a piece of plywood to the hull and screwing into that, which is standard procedure.

bcoates • Dec 4, 2012 • View on HN

Couldn't you use flying buttresses to stabilize the inverted pyramid without lifting weight off the bottom brick?