Hello,
I want to calculate the principal stretch values of the green-lagrange strain tensor C in ufl but i keep getting error:
File "/usr/lib/python2.7/dist-packages/numpy/linalg/linalg.py", line
216, in _assertFinite
if not (isfinite(a).all()): TypeError: ufunc 'isfinite' not supported for the input types, and the inputs could not be safely
coerced to any supported types according to the casting rule ''safe''
What I try so far is:
...
C = F.T*F
from numpy import linalg as LA
import numpy as np
CC = np.array( [ [C[0,0], C[0,1], C[0,2] ], [C[1,0], C[1,1], C[1,2]], [C[2,0], C[2,1], C[2,2]] ] )
lmbda, wv = LA.eig( CC )
