- #1
laforzadiment
- 12
- 0
Hi all. It's been a while since I've taken mechanics of solids, I was hoping I could get some confusion ironed out here.
I have a long thin plate with C channels welded along its length, below is a cross sectional view.
[PLAIN]http://img375.imageshack.us/img375/6672/channelexcel.jpg
As you can see, I have placed my axis about the neutral axis of the plate as well as its left edge. In my scenario I have an upwards pressure load on the bottom face of the plate.
I treated this entire setup as multiple rectangular bodies, computed the MOI about their centroids then used the parallel axis theorem to relate them to my chosen axis and combined them for the overall Ix and Iy about that origin.
My problem arises when I don't comprehend what I have found. Is Ix the resistance of this entire cross section bending in and out of the page about the x axis? So for example, a vertical strip would become a 3 dimensional U shape with the "prongs" facing the viewer?
If so, this is not what I am looking for. I need the resistance of the above shape transforming into a "rainbow" shape; it's resistance to buckling. Is this Ixy?
I have a long thin plate with C channels welded along its length, below is a cross sectional view.
[PLAIN]http://img375.imageshack.us/img375/6672/channelexcel.jpg
As you can see, I have placed my axis about the neutral axis of the plate as well as its left edge. In my scenario I have an upwards pressure load on the bottom face of the plate.
I treated this entire setup as multiple rectangular bodies, computed the MOI about their centroids then used the parallel axis theorem to relate them to my chosen axis and combined them for the overall Ix and Iy about that origin.
My problem arises when I don't comprehend what I have found. Is Ix the resistance of this entire cross section bending in and out of the page about the x axis? So for example, a vertical strip would become a 3 dimensional U shape with the "prongs" facing the viewer?
If so, this is not what I am looking for. I need the resistance of the above shape transforming into a "rainbow" shape; it's resistance to buckling. Is this Ixy?
Last edited by a moderator: