I’m trying to program geometric non linear analysis (finite element)-for a shallow truss element.I am using the book by Crisfield for the purpose. Basically, I am using the incremental approach for analysis.And I am struck with a problem.The problem is that my Structural stiffness matrix (after application of Boundary conditions) is singular i.e. it’s determinant value is “0”.
I am working on fracture mechanics , calculating K and J in ABAQUS
Can you please tell me how to model singularity at crack tip in Hypermesh/ABAQUS -CAE.
Do we have any tutorial available on internet ?
my id: patilmt [at] rediffmail.com
Thanks
Mangesh
I am looking into object oriented programing of the finite element method. I don't know whether somebody can provide a general-purpose oop design of a general finite element program, say a linear static analysis of a 3D solid. Or somebody who are experienced in this field point out some good references for this purpose. It will be better if the oop design is language free, i.e. not directly related with implementation in a specific language such as c++. Thanks in advance.
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Hi all,
I have a fundamental question on Tensors. The length of a vector (firts order tensor) is independent of the reference co-ordinate system. In case of second order tensor (stress/strain), the invariants (I1, I2, I3) are independent of the co-ordinate system.
If I consider 4th order tensor (of course 3rd order also), say Cijkl, what parameters are constant? (Like length in vector and invariants in second order tensors).
Thanks in advance,
- Ramdas
I have used cohesive elements to create cracks now I am interested to seal the created cracks in order to study stress changes so I need to add this as a step to my analysis-
Does anybody know any trick for doing this? Can I do this by keeping the pressure inside fracture constant?-please give me comments
