Metal forming

14 Mar 25

How is the FLD obtained in LSPOST? What is the limitation of using this FLD?

The FLD in LSPOST is based on an experience data; it is only good for one specific material under linear…

14 Mar 25

How many levels of adaptive mesh do I need in my calculation?

It depends on the initial mesh and the curvature of the tools. Usually it is necessary to have at least…

14 Mar 25

How to do hydro forming analysis?

There are two ways to apply pressure, i.e. a) using *LOAD_MASK b) using *LOAD_SEGMENT or LOAD_SEGMENT_SET Note: a) Only positive…

14 Mar 25

How to use non-smooth trimming?

Non-smooth trimming is a recent feature in LSDYNA, it is easily realized by using a negative value for the parameter…

14 Mar 25

I found that the number of adapted elements was too large when I performed a multi-stage forming analysis using adaptivity. Is there a way to avoid this problem?

You need to specify a minimum element size to prevent too fine a mesh from being generated when using adaptive…

14 Mar 25

I generated a dynain file after forming analysis. Additionally, I used DYNAFORM to trim the mesh, and did springback prediction. However, I found that the predicted springback is too small to be true. What is the problem?

This is a difficult question, there are many factors affecting springback prediction. However, it is said that there is a…

14 Mar 25

I had no problem in running a forming job, however, when I used adaptive method, the contact does work properly even from the beginning without adaptivity. What is the problem?

If the forming contact is used, the automatic reorientation of contact interface segments during initialization is selected automatically. However, the…

14 Mar 25

I have no experience in springback prediction, and have no idea whether my prediction is reasonable. Do you have any idea how accurate the solution could be from LSDYNA?

Even though the accuracy varies with different forming condition, it has been found that LSDYNA3D can be used to predict…

14 Mar 25

How do you trim the blank after a forming analysis?

Usually the blank can be trimmed after forming simulation with an intermediate file – “dynain”. The following is a list…

14 Mar 25

How can I evaluate material formability for a new material?

You need to provide your own FLD, which might be obtained from experimental data or from theoretical predictions.

Metal forming Archives - Page 4 of 10 - LSDYNA

Metal forming