i'm doing a physics project on engineering and i need to know how a truss works please someone help.
2007-02-27 12:50:03 · 3 answers · asked by i messed up 2 in Science & Mathematics ➔ Engineering
A truss knows no moment. The beauty of a truss is it's simplicity. The forces in ANY member of a truss is loaded in axial stress only. NO MOMENT.
It is a beautiful structure. I have analized many.
2007-02-27 18:44:57 · answer #1 · answered by daedgewood 4 · 0⤊ 0⤋
I know what he's talking about, but probably because I'm an engineering student and belong in this section...
Back on topic, a truss distributes the force of any load applied to it. For example, a crane uses trusses to distribute a load over a series of different members to reduce weight.
When doing the FBD on trusses, one focuses on the points of intersection of said trusses. If you have a force pushing down on a triangle, supported at its two other points (base), there will be a moment and pair of force reactions on each of these supports.
http://physics.uwstout.edu/StatStr/statics/StatII/images/e14a4.gif
Very similar to points A and D there.
EDIT:
Single trusses have no moments, but to get your reactions, you need to use all 3 static equilibrium equations. 6 if you're in 3 dimensions. If you are doing a FBD (free body diagram) on a connection, you're right, there is no point in taking a moment through a point, its zero.
2007-02-27 21:46:28 · answer #2 · answered by Anonymous · 1⤊ 1⤋
why didnt u ask your teacher?, i dont think these gimps would even no what that is... like me for 1...
2007-02-27 20:57:20 · answer #3 · answered by Anonymous · 0⤊ 0⤋