Computational Mechanics Forum

Hey,

I was working with the user defined MPC constraint in ABAQUS. I am using a script file to apply the constraints. I encounter a problem. I want to use more than two points and give a derivative for eacht of these points (derivative is A). Now I can only add a controlpoint and a set of points as a surface, but all these point in the surface will have the same A value.

With an input file you can just put the points after each other seperated with a , .

My problem is hard to explain. I hope someone can help me

Dear All,

We tried to simulate simple shear using ABAQUS and compared it with the analytical solution. To our surprise, even though the equivalent stress and strain matched perfectly, the component stress and strain had a large deviation between the semi analytical and ABAQUS methods. The zero components in the analytical model were calculated to be non-zero in the results of ABAQUS. This paradox could not be understood clearly as whether it is a case of software deficiency or conceptual error. A COMPLETE ANALYSIS OF THE PROBLEM IS ATTACHED AS A REPORT.

 

Hi all,

Is it needed to assign singularity at the crack tip in VCCT technique.

 Hi All, I need to write a FE code for my mid term project to get the cross section proeprties of a steel section (it could be I shaped, C / channel shaped, paired channel sections, paired I sections).I know the tough part here is the computation of warping function.Could anyone help me with some references / spproach on this-I'll be extremely grateful. The proeprties include: 1 Geeometric proeprties

Hi,

For a transient time based problem, how do we know when to solve an FE problem using Newtow-Raphson iterations?

For example in a thermo-viscoelastic problem where there is only temperature change with time, and no external forces - would it require NR iterations to obtain solution or a time marching solution is enough?

Thanks,

Hi,

I am developing a code for a weakly coupled thermal-structual analysis. I perform a transient thermal analysis which gives me the temperature distribution over time, and I calculate the structural deformation based on the temperature change. 

Some of the structural material property is dependent on temperature. Since in transient thermal analysis, every node can have different temperatures, how can I handle the assigning of material properties according to the temperature?