die formel für die integration lautet:
Integral(von Dmin nach Dmax)S(t)dD
Code: Alles auswählen
#---------------------------------------------------
from scipy import *
from scipy import integrate
import numpy
import math
from scipy.integrate import odeint
from scipy.integrate import quad
from scipy.interpolate import interp1d as interp
Temp_t=[0.0,27.125*60,37.125*60,57.125*60,67.125*60,87.125*60]
Temp=[490.15,273.15,273.15,353.15,353.15,273.15]
T=interp(Temp_t,Temp,bounds_error=False)
alfa=24.5E-6
T_ref=292.15
C=[3.2E4,0.037,5.1,6524.7]
E=52600
def dSdt(S,t):
dTdt=(T(t+1.0E-2)-T(t))/1.0E-2
dEpsThdt=alfa*dTdt
dEpsKrdt=sign(S)*C[0]*sinh(C[1]*abs(S))**C[2]*exp(-C[3]/T(t))
return -E*dEpsKrdt-E*dEpsThdt
S0,t=0.0,arange(0.0,87.125*60,1.0)
S=odeint(dSdt,S0,t) #S=Spannung
"""def dDdt(D,t):
dTdt=(T(t+1.0E-2)-T(t))/1.0E-2
dEpsThdt=alfa*dTdt
return -dEpsThdt
D0=0.0
D=odeint(dDdt,D0,t)
"""
D = -alfa*(T(t)-T_ref) #D=Dehnung
import pylab
pylab.plot(D,S,'r-')
#pylab.ylim([-30.,30.])
pylab.xlabel('Dehnung')
pylab.ylabel('Spannung[MPa]')
pylab.savefig('ode.pdf')
pylab.show()
#-----------------------------------------------Ende