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Major_Tom wrote:OWE, check this out.
Major_Tom wrote:If you have this on your computer, is there any way you could make it available to others (me) via e-mail or something else?
Just to show you how poorly this hinging is understood, Mangoose's couple of JREF posts from over 14 months ago are still cited as evidence of some significant cubic "tilt" the upper block supposedly underwent.
It's an open book.
If you want to under stand the buckling of the tube structure, press lightly on the side of a beer can while standing on it.
How Do You Break a Tubular Structure?
Semi-flexibleTube-like structures with square cross-sections bend and break according to the following sequence:
Case 1: Starts to kink in a corner:
1) Kink forms in corner
2) 2 progressive creases form across the faces adjacent to the kink
3) bending of tube (what we call "tilting")
A crease (or seam) is a collective somewht linear progressive deformation of groups of columns
The displacement of surface of the crease or kink is always normal to the local surface of the tube
Kinks and creases will be displaced inwards.
Case 2: Starts to crease along one side
1) Some type of deformation is witnesses along one face (a crease,"dimple" or lean or other?)
2) This deformation progresses into an inward crease
3) crease reaches adjacent corners, corners kink
4) Entire side reaches critical creasing and rips, effectively severing top wall from bottom
5) Tube begins to bend as either creases or progressing failure and crushing is seen to progress down the sides of the tube
6) Tube continues to bend because the only face of the tube left intact, the face opposite the bend, bends. Note that this is the only face of the four that fails by bending, not creasing.
The WTC1, 2 perimeters are in every way semi-flexible tubular structures. They must either kink, crease or progressively deform in some way before "snapping" or ripping in two parts.
Semi-flexible tubular structures cannot just "snap" along a horizontal line and separate into top and bottom without considerable struggle: progressing deformation, collective creasing or other very noticable struggle before failure.
They must be seen to deform significantly before they can separate into two parts: top and bottom.
The initial perimeter failure of WTC1 is totally different than how a meshed tubular structure can be expected to fail.
It failed way too easily.
No, it just means you cannot see the crease (probably on the inside).Major_Tom wrote:The WTC1 west wall just splits in two with no initial visible crease. This is unphysical.
This is from the story 97 windows down, yes? If so, it is precisely what I would expect.(And then the top kicks out over the bottom. This, too, is unphysical.)
False.Major_Tom wrote:You haven't followed much of what I've been writing.
I do.You may want to try to understand it before offering an opinion.
False. "In Internet slang, a troll is someone who posts controversial, inflammatory, irrelevant or off-topic messages in an online community, such as an online discussion forum or chat room, with the primary intent of provoking other users into an emotional response or to generally disrupt normal on-topic discussion." fromYour comments on some of the threads in which I have been trying to discover and offer new information have been troll-like.
I always try to do so. For example, at the time the west wall broke, there was already at least 215 MJ available to do the breaking.If you have anything useful to offer, please do.
Often one line is enough for the educated. If not, feel free to ask.But the world is already filled with superficial aswers to complex questions, so why offer more one-liners?
Best you follow your own advice.Best to think before posting.
False. "In Internet slang, a troll is someone who posts controversial, inflammatory, irrelevant or off-topic messages in an online community, such as an online discussion forum or chat room, with the primary intent of provoking other users into an emotional response or to generally disrupt normal on-topic discussion."
Major_Tom wrote:Failure of the west wall:
We can see the S to N ejection pattern. It moves so rapidly across the W face that it is hard to detect unless we use the high res version and play it at slow motion
OneWhiteEye wrote:Major_Tom wrote:OWE, check this out.
The first segment, all I can say is WOW. I wish I'd seen this a long time ago. Further inspection is necessary, frame by frame, with enhancement.
Thanks for finding that and putting it up.
Unlikely. On PhysOrgForum shagster posted about using some video to track one of the antenna mast stay wires, stating that it remained rigid so long as visable.femr2 wrote:... my impression is that, after slight initial tilting of both antenna and cap, that the antenna tilts independently of the tilt of the cap itself.
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