Chapter12-Plastic Behaviour of Solids

Ex1-pg345

In [1]:
import math
#calculate plastic yeilding and max allowable stress and axial stress and transverse stress and total elonganation for stability in meter
alpha=45.
sigmayp=35.*10**6 ##Pa
k=840.##MPa
n=0.2
L0=3 ##m
Aad=10.*10**-5 ##m**2
Acd=10.*10**-5 ##m**2
Abd=15.*10**-5 ##m**2

P=sigmayp*Abd+2.*sigmayp*Aad*math.cos(45/57.3)
print'%s %.2f %s'%("plastic yeilding in N is= ",P,"")
sigma=k*n**n
print'%s %.2f %s'%("maxi allowable stress in MPa is= ",sigma,"")
epsilon1=n
print'%s %.2f %s'%("axial stress is= ",epsilon1,"")
epsilon2=-0.1
print'%s %.2f %s'%("transverse stress is= ",epsilon2,"")
epsilon3=-0.1
print'%s %.2f %s'%("transverse stress is= ",epsilon3,"")
z=3*n
print'%s %.2f %s'%("total elongation for stability in meter is= ",z,"")
plastic yeilding in N is=  10200.03 
maxi allowable stress in MPa is=  608.81 
axial stress is=  0.20 
transverse stress is=  -0.10 
transverse stress is=  -0.10 
total elongation for stability in meter is=  0.60