I'm trying to simulate a coupled thermal-electric-mechanical welding simulation as an axisymmetric case. Since Abaqus currently doesn't support elements for this type of simulation, I've had to perform mechanical (static) and coupled thermal-electric simulations for each time step and transfer...
@FEA way, thanks for the advice. I tried as you said and with no success.
I'm trying to model Al melting b/w two Cu layers. So, I'm trying to model the portion of Al that melts using purely cohesive behavior (small sliding, surface-to-surface) and the portion that doesn't melt using...
Hello all,
I'm trying to model a welding problem between Cu-Al-Cu stack-up. Al melts before Cu and when that happens, I want to introduce cohesive contact behavior into the model. The model uses friction-less hard contact behavior until then.
I import material state without updating the...
I need these layers to expand under constant pressure and increasing temperatures as the simulation goes on. I don't necessarily want the edges to be in contact throughout the simulation. They can be only when they have to be, So, I guess adding contact stabilization makes most sense but at what...
Yes, exactly that.
A close-up of the right end.
How do I handle these rigid body motions in case of static stress analysis. I've been trying tie constraints until now, but i'm pretty sure that it's wrong.
I have a 3 layer stack-up which are all in contact at the beginning of the simulation. At the end of the simulation, they separate due to applied pressure. Now, if I were to restart this simulation with the same applied pressure, some parts of the stack-up are no longer in contact. How do I make...
Yes, thank you.
Since I'm using input files to do all this, I'll have to resort to using DISP subroutine to prescribe voltages. Is there an easier way around the subroutine?
Thanks for reply. But won't this apply a boundary condition i.e. the voltages at the selected nodes will remain fixed for the entire analysis? I want to define only the initial values of voltages at all nodes; the voltages should be able to be updated throughout the analysis.
Now that I think...
I'm trying to transfer voltages between two coupled thermal-electric analyses. Any suggestions?
I tried going the pre-defined field route but I can only import 'epot' as a field variable to modify material properties using USDFLD. So, not helpful.
I also can't use DISP to import voltages since...
@FEA way, I figured it out. It's to do with the way ABAQUS averages electrical power over a time increment in a transient analysis.
It computes power by integrating the electric field over the increment. In doing so, it uses the electric field at the end of the increment and the change in...
@FEAway thanks for the reply. Ignoring the temperature change, the electrical energy dissipated (I explicitly set the Joule Heat Fraction to 1 just to be sure) which acts as the source of heat for temperature rise should not depend on the time step though. According to ABAQUS documentation, only...
I'm trying to model a Resistance Spot Welding process using an implicit and transient thermal-electric problem on ABAQUS and came across this problem. Here's a simple test case in which i replicated the problem.
Consider the following axisymmetric analysis (no heat flows in or out of the...
