the thing is you can't define a surface by those three arcs. What happens between the arcs ? are they three cylindrical surfaces, intersecting at a hard boundary ? Is the shape a spherical dome with cut-outs ? Is there a radius along the intersection lines (of the three cylinders) ? Is the...
going back to your graph of temp on Oct 30th. If I look at that data I think I can see a 1deg C rise over those 20 yrs ... does that fit to the same populations too ?
If I look at your hurricane data it looks to me as though there were more cat 1 storms in the LH portion ... maybe the L:H and...
NASA had a F111 tricked out with this ... an elastic covering instead of discrete flaps ... looks like it didn't go anywhere ... possibly because the gap/slot with the discrete flap is a primary aerodynamic influence.
c'mon, the space elevator is a reasonably legit project ... sure it's goals are lofty (pun intended), sure it may be better suited to other places (like the Moon or Mars (read Green Mars ?) but it's no sillier than half the nonsense going on these days.
is there a question there ? but yes flutter (and other aeroelastic phenomena) requires it's own analysis and is much more a 3D problem (unlike 2D flow around and airfoil) and even more specifically a plane design issue (rather than here is my wing, and so there is my flutter analysis).
@human909 ... this is clearly a textbook problem. Solving it using an online program isn't, in my mind learning, anything; particularly anything applicable to the real world where we aren't (usually) presented with such simple problems. I personally dislike online beam calculators, since the...
@LD ... something about that graph (of K) seems odd unless the other factors mitigate ... ok, so K decreases with Lub ... makes sense ...
but why is wear for incompatible metals 100 times less that identical materials (at the same lub assumption) ?
is the legend flipped ?
I've done this before. It requires a lot of testing (to match the specific strength of the lot to the required failure load ... depending on your tolerance for failure load).
An internal grove ?? sounds way (sorry, Way) harder to produce than an external grove. Failure should be evident (and...
"I think they're just upset it didn't say what they wanted it to say." I think you're probably right. It sounds like you are confident with your report, so a couple ways to react
1) discuss with the customer what they want to see, If it is a home inspection report, quote the delta cost.
2)...
what will the skin look like between the arcs ? flat ? curved (outwards or inwards) ?
maybe take a triangle, supported at the three corners, and apply a load to the center (discrete or distributed), and allow the triangle to deform hyper-elastically ... just to see the shape it becomes ?
then...
with your very idealistic loading, the shear flows in the skin are constant. But the ribs break the skin into panels and this determines the shear buckling allowables
the surface is spherical, yes? mesh the sphere then cut it.
better embed the edges into the spherical surface and mesh that (so that your edges are part of the mesh.
How you create the spherical surface will affect the resulting mesh !
Yeah, this is very much a school question ... who'd make a wing skin panel 1m wide without stringers ? who'd make a wingskin 2m * 1m by 3mm (1/8") thk ??
and as such should be in the student forum.
You'll have to make a 'boat-load" of assumptions ...
simply supported edges,
pressure only, no...
