Hello everyone,
I have three displacement field vector components u, v, w in my .vtk file
and wish to display the associated stress tensor.
I made the following steps:
- Apply the filter Gradient Of Unstructued DataSet
-> Now have 9 scalars Gradient_0, ... , Gradient 8
- compute components of stress tensor via sigma_ij = div(Gradient) + u_i,j
-> Now have additional 9 scalars sigma_ij
- from this form traction vectors:
T_i = sigma_ij e_j ,where e_j are the unit vectors iHat
-> Now have three traction vectors from which the tensor field
computation doesnt work:
- I do Result = T_1*iHat + T_2*jHat + T_3*kHat for the tensor
calculation and get the following error message:
ERROR: In
/home/abuild/rpmbuild/BUILD/ParaView-v4.0.1-source/VTK/Common/Misc/vtkFunctionParser.cxx, line
201
vtkFunctionParser (0x205ddac0): Parse: Error deciding between
ambiguous operators
ERROR: In
/home/abuild/rpmbuild/BUILD/ParaView-v4.0.1-source/VTK/Common/Misc/vtkFunctionParser.cxx, line
300
vtkFunctionParser (0x205ddac0): expecting either 2 scalars or a scalar
and a vector
ERROR: In
/home/abuild/rpmbuild/BUILD/ParaView-v4.0.1-source/VTK/Common/Misc/vtkFunctionParser.cxx, line
201
vtkFunctionParser (0x205ddac0): Parse: Error deciding between
ambiguous operators
- Can you help me or tell me gow to visualize the stress tensor from
the displacement field?
- Alternatively you it would also be good to know how to multiply the
result of filter Gradient of Unstructured DataSet by a scalar value.
Many thanks for helping!
Gianna
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