Metal forming Archives - Page 7 of 10 - LSDYNA

Metal forming

Use the card of *CONSTRAINED_RIGID_BODY_STOPPERSYou can constrain the displacement by specifying a negative value for LCMAX and LCMIN.How is seamless springback analysis done with LSDYNA?

In the input deck, simply include a *INTERFACE_SPRINGBACK_SEAMLESS control card. Make sure to add proper constrains to remove rigid body…

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What are the differences between smooth and non-smooth trimming?

There are two methods in trimming, i.e. smooth and non-smooth trimming. In smooth trimming, the boundary element will be cut…

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What can I do if the direction of the pressure is not reasonable after the mesh had been refined adaptively?

When I used adaptive mesh in hydro forming simulation, there was no problem in the initial stage. However, I found…

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What can I do if the mesh for the last state was not written to the d3plot after restarting from d3dumpxx?

I performed springback analysis using the seamless method, but no converged solution was obtained. Then I wrote a small input…

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What is FLD?

FLD stands for Forming Limit Diagram, and it is a criterion, which is commonly used to evaluate the sheet metal…

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What is the use of RIGID-BODY_STOPPER?

When both force and displacement are applied to a rigid body, it is necessary to use this card. If the…

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What kind of velocity pattern is better for metal forming analysis?

Smoothly changed velocity pattern is found to be better than the others, especially for springback analysis. However, using a complete…

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When I attempt to do a springback analysis, I sometimes have difficulty in obtaining a converged solution. What options are available to improve convergence of springback?

There are several ways to improve the convergence a) Use multiple steps in implicit analysis. The step number is defined…

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When I did dynamic relaxation analysis in gravity loading process, it took a long time to get a converged solution. Is there a way to make this analysis faster?

If the dynamic relaxation method is used for static loading analysis, the following methods can improve the solution speed: a)…

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