Calculate Deflection at Point D with 245N Force Using Energy Method

[chungaaabb]

Hi to all.

I need to calculate the deflection at D. At point D, there is a force of 245N acting on it. If I know the cross sectional areas of all beams, is it possible to use energy method to calculate the deflection?

 

[timthereaper]

Probably the best thing to do is to take a FBD of the horizontal beam and use Castigliano's method (which is related to the strain energy) to get the deflection at the load P acting at point D.

 

[afreiden]

What's the depth of the horizontal member?
Most likely you can neglect axial deformation in the diagonal and your results won't really change noticeably.
This would make the problem a pretty easy beam problem.
See here if you like: http://utsv.net/classical-structural-analysis/6-axialbending-composite-indeterminate

 

[chungaaabb]

thx guys