Deflection on structure
Deflection on structure
(OP)
Hello everyone
I need your help for the calculations of this structure (see picture). I have dificulties on interpretate the effords on the beams.
From where should I start?
Thanks
I need your help for the calculations of this structure (see picture). I have dificulties on interpretate the effords on the beams.
From where should I start?
Thanks





RE: Deflection on structure
RE: Deflection on structure
John R. Baker, P.E.
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To an Engineer, the glass is twice as big as it needs to be.
RE: Deflection on structure
This would lead you to support reactions, which are treated as a vertical load downwards on the end columns. Note there are cross braces which would need to be determined statically.
The structure is symmetric along length and width. So from the vertical load down on the plate, the counterpart beams would be equally supported.
The deflections would be the sum of elements individually deflecting. So most of it would be at the plate and the beam structure below, then a tiny bit at the columns. The rest of the structure member deflection are probably minor.
It would be a problem for beam software since hand computations would be involved. The deflection of the plate supporting the centre load can be found in Roark's. The rest of the problem would be classical beam theory, extensive computations.
RE: Deflection on structure
RE: Deflection on structure
each link in the chain has to be able to do it's job.
RE: Deflection on structure
I have consider your helps and I think it went well. At least based on what Solidworks said ;)
I did the calculations for the top beams and I had to reforce it with some crossed beams.
Now I have another problem. I have to replace the four vertical beams for four round columns (or tube). I calculate the diameter for each and it seems to me that the diameter is very small (about 50mm). I've done it for compression(Euler) and traccion(P=F/A).
When I look at similar presses, it looks to me that the diameter of the the columns are larger, what should I do?
thank you all
RE: Deflection on structure
Regards,
Cockroach
RE: Deflection on structure
P=Yield strengh=335Mpa/4=83.75Mpa
F=1000/4=250kN
P=F/A
From this calculation I've obtained 60mm diameter. I looks small to me but I can't justify a larger one. I wonder if the columns that I've checked on the net are made of tube?
RE: Deflection on structure
No they would be seamless tubing, cold drawn, probably ASTM A36 or 1020 equivalent. I would be looking at 1/8 to 1/4 inch wall perhaps.
Regards,
Cockroach
RE: Deflection on structure
you're using 60mm diamamter ... what wall thickness ?
(surely not solid bar ??)
RE: Deflection on structure
I was calculating it as a solid. I've done it as a tube and it seems fine to me.
Thank for your opinion
RE: Deflection on structure