In [66]:

    

from math import pi
import pint
u = pint.UnitRegistry()


    

In [67]:

    

L = 1800*u.mm
Le = 0.5*L
Le = 1800*u.mm
b = 12*u.mm
d = 20*u.mm


    

In [68]:

    

I = (1/12)*b*d**3
I


    

    
Out[68]:




8000.0 millimeter4

In [69]:

    

E = 15e6*u.psi


    

In [70]:

    

E.ito(u.MPa)
E


    

    
Out[70]:




103421.35939752543 megapascal

In [71]:

    

Pcr = ((pi**2)*E*I)/(Le**2)
Pcr.to(u.N)


    

    
Out[71]:




2520.3158120406447 newton

In [72]:

    

Pallow=Pcr/5


    

In [73]:

    

Pallow


    

    
Out[73]:




504.06316240812896 megapascal millimeter2

In [75]:

    

I.to(u.inch**4)


    

    
Out[75]:




0.019220076880230648 inch4

In [76]:

    

L.to(u.inch)


    

    
Out[76]:




70.86614173228347 inch

In [ ]: