Recent content by saintgeorges

Thank you for all your replies, and help.

I am afraid I do not understand you. Yes, when scaling this body, the center of the scaling should remain fixed. The problem is that up until now I have been using volume centroid as the center of the scaling. Now, it looks like volume centroid of the box that covers this body could be used too.

Hi rb1957, I am not sure I understood you. By scaling a volume its support surface underneath moves also.

By scaling it, the bottom surface beneath the body also moves, with the new scaled object.

The Photos did not appear in the upper initial post. I apologize for that. Here are the there photos that should have appeared up: http://files.engineering.com/getfile.aspx?folder=64801518-d4fe-46cb-a6a8-268c513a5d47&file=1.jpg...

Hi, I have a solid body (of a material of uniform density, for example steel), and I want to scale it by 2 times. As a center of scaling, I have always been using volume centroid, as its the same one as the center of the mass. Here is the preview of the body and its volume centroid: "VC" -...

Thank you rb1957. So I could use the general expression for elastic potential energy? : U(x) = (1/2) * k * x^2 k = (A*E)/L U(x) = (1/2) * ((A*E)/L) * x^2 ? So that's the expression for elastic potential energy of axially loaded column? The change in potential energy would be the derivative of...

Thank you for the reply, both of you. It should be "potential" energy, instead of "bending". Terribly sorry about that. So "an expression for potential energy and for the change in potential energy coming from the selfweight/or point load on top of the column" is the right sentence. @Buggar...

I am looking for an expression for bending energy and for the change in potential energy coming from the selfweight of a vertical circular solid column, or maybe from vertical point load on top of it. Any ideas where I could find these? Thank you.

Is anyone willing to show me some video tutorial, or even record it's own Ansys screen on buckling and lateral torsion check of a simple plain truss members: The amount of the compressional force on the left is not important, it can be any value (1,2,3 kN). The dimensions of the truss too -...

Understood. Thank you rb1957, BAretired, pax, I owe a couple of beers to all of you, for the help and patience you had. I wish you all the best.

Thank you for the reply rb1957. All four red lines in top view are contact lines. I just bolded them in order to be seen more clearly. I understood you about the moments calculation. But as W force in not perpendicular to the far right red axis, I need to decompose it into two forces - Wp and...

BAretired, are we neglecting one of Wind load resultants components (Wp)? F1 - resultant of the self weigh of object (dead load) F2 - resultant of outer, external surface load W - resultant of wind load Wn - component of W, normal to overturning axis Wp - component of W parallel to...

I am apologizing for the late reply. @ rb1957: There were two methods montioned in this post. One method was by - interesecting the lines of action of wind load resultant and objects mass resultant. And then summing those two vectors in the position where their lines of action intersected. The...

I made a mistake: yellow vector represents the resultant of the surface load. Not blue! Here is the image. Sorry for that. To bad this forum does not have an edit post function.