if M is your mass matrix and K is the stiffness matrix, use
[phi w2]=eig(K,M);
phi contains the eigenvectors (each column is a modeshape)
w2 is a diagonal matrix, each diagonal entry contains wn(i)^2
(i.e. the i'th natural frequency squared).
Then how to draw the mode shape with eigenvectors?
Thank you.
hi
I am doing a structural analysis in Abaqus
A pipe with side walls
Loadings are : Internal pressure , concentrated force on the wall and bending moment
The problem has to be solved such that the cylinder slides on the side walls.
with internal pressure it works but when i bring the side force or moment there is an error massage of overclosure...
I am not understanding what is it.
?
can any body help me.......
Hello,
Im trying to simlate delamination in abaqus and after going through the documentation i decided to go for the cohesive element approac. In the documentation it is mentioned that we use a general contact(explicit) for the interation but when i do that i am unable to use general, static step. So which step do i go for if i i want to simulate a static delamination ?
Hello,
Im trying to model Delamination in abaqus using cohesive surfaces. I did the following :
-created a cohesive intertaction property, defined damage initialisation and evolution in this and then used general contact between 2 surface and used the interaction property for it.
-For the initial crack i left a certain region unbounded and used a double cantilever model.
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Hi,
I am familiar with abaqus python scripting to create odb files and to extract nodal data from an output database (odb) file in ABAQUS. I would like to know whether it is possible at all, to extract the boundary conditions from an odb file. I guess that the boundary conditions are not stored in an odb file. But I am not sure. Any help in this regard ??
I am pursuing my phD in one of the universities in india in fracture mechanics. I have completed all the formalities of my university before submitting the final thesis report like completing the course work examinations and comprehensive vivavoce. My work is related to accurate stress intensity factor determination at the crack tip through FEA approach for a mixed mode crack propagation.I have taken a new methodology suggested in one of the old journal papers in FEM and I have used the formulae mentioned in that paper to extract the SIF results.
