Modified items

In LSDYNA, there are many choices for contact. What is the commonly used contact type in stamping analysis?

I performed springback analysis using the seamless method, but no converged solution was obtained. Then I wrote a small input deck and restarted the calculation from d3dumpxx. From the message file, the converged solution was obtained, but when I tried to use Taurus to display it, the mesh for the last stage was not written to the d3plot file. Is there a way to avoid this?

When I used adaptive mesh in hydro forming simulation, there was no problem in the initial stage. However, I found that the direction of the pressure wasn’t reasonable after the mesh had been refined adaptively. What was the problem and how can it be fixed?

There are two methods in trimming, i.e. smooth and non-smooth trimming. In smooth trimming, the boundary element will be cut exactly along the trimming curve; while in non-smooth trimming, the boundary element can be either kept or removed from the model and it will not be cut in half. What is the advantage of each method?

When I used *LOAD_MASK for hydro-forming analysis, first I have no problem in applying the load, but the load is in the wrong direction. I used negative value for the load curve to reverse the load direction. However, there was no load applied to the blank anymore. What might be the problem?

When I do a forming analysis there is large penetration of the blank into the rigid tools. Is there a way to reduce the penetration problem?

When the constraint contact is used, the mesh is distorted in the forming analysis. Is there a way to prevent this distortion?