Thread: Physics Guru needed
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07-05-2010 #4
Since I've just had my structural analysis exam today I had vowed not to do any more calcs for at least a week........:nope:
So use this site http://www.engineeringtoolbox.com/be...on-d_1312.html
use the metric option Beam Supported at Both Ends, Load at Center
q= load = mass x gravity (25kg x 9.81= 245.25N) add the weight of the carrige as well
l = length in mm
I= moment of inertia = pi times r^4/4 = 19174.76 mm^4 (for a circle)
E= modulus of elasticity (find out from supplieror or use 200000 N/mm^2 for steel )
y= radius (25mm)12.5mm (thanks Irving)
This is only for a simply supported beam so will be worst case, If the supports are nice and solid then you could go for a fixed beam. I'll have to digg out the formulas and do an excel sheet for all the options.
I think most of this is correct, my brain is pretty fried at the mo tho:heehee:
Good luckLast edited by Ross77; 08-05-2010 at 12:19 AM.
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