Recent content by Elmas

No problems, we're not in a hurry...

I will PM...

About buckling, of course...

let's edit it. ...the most important thing is that the two of us understood each other ...

Physics I exams ( General Static, General Dynamic (including harmonic motion), General Thermodynamics) and same Professor of the previous post. A Student goes to the blackboard for his exam. The Professor is confabulating in a low voice with his Assistant and, without even looking at the...

So did I. Dear ThomasP, I hope we will be able to continue discussion about Euler's critical load ( and also Johnson's parabolic formula, of course), Bredt's Formula and Mohr's circle and their application to airplane design in other places. Ciao Antonello

This is myself about thirty years ago, with my Free Flight gliders (no radio or control whatsoever, as the name implies: they had to fly by themselves..) ... They were absolutely identical, but were trimmed in a quite different way: the yellow one had a C.G. at 75% of the chord (yes, different...

More simply, I always said my students that between a wall built with "bricks and stones" and a wall built with "brick or stones" there could be a difference of several thousands of euro, possibly to be paid out of their own pockets, so to be careful to what they were writing on their drawings...

Exam of one of the most dreaded subjects of the first year of University, Structural Engineering: Physics 1. One of my Colleagues is standing in front of the blackboard. Professor: “There is a car that starts with zero speed and an acceleration of xxx meters per second squared, find me the...

How were those two pieces of wood glued together, if may I ask?

..If anyone tries to tell you something about an aeroplane which is so damn complicated you can't understand it, you can take it from me it's all balls. R. J. Mitchell, advice given about his engineering staff to test pilot Jeffrey Quill during Spitfire prototype trials. Gentlemen, please...

JOCULAR MODE: ON Once that with Varignon's theorem, that states that the torque of a resultant of two concurrent forces about any point is equal to the algebraic sum of the torques of its components about the same point ( in other words, "If many concurrent forces are acting on a body, then the...

I do totally agree.

Whe have to do all calculation with this, using Saint-Venant's principle as in WWII time, or we are allowed to use a computer for a non-linear FEA?

It must be said that "thin" metallic structures, as those of the airplanes, are not (only) calculated on a basis of the maximum stress that the material can allow, but on the necessity to avoid buckling due to compression stresses, that in most cases is more dangerous than reaching the critical...