Performing Springback Analysis using LS-DYNA Software — Lesson 8

How do you complete a springback analysis in LS-DYNA software accessed through Workbench software?

Please refer to the attachments to access the solution for an example of performing springback analysis in LS-DYNA software using the seamless method.

In the seamless method, LS-DYNA software begins by performing an explicit forming simulation. When the termination time is reached, LS-DYNA software automatically and seamlessly switches to the implicit method while continuing with the springback simulation. At the time of switching, a user-specified list of parts (the sheet blank) is retained as active, and the remaining parts (the rigid tools) are deleted from the model. All contact interfaces are also automatically deleted. An optional list of nodal constraints is activated to eliminate rigid-body motion after the tools are removed for the static springback simulation.

After switching seamlessly, LS-DYNA software proceeds to perform a static implicit springback simulation. A special set of defaults are used, which eliminate all requirements for the *CONTROL_IMPLICIT keyword input. These alternate “springback” defaults are identified clearly in the user manual and affect the time step size, artificial stabilization, and automatic time step control parameters. Default parameter values can be overridden by including optional *CONTROL_IMPLICIT keywords into the forming input deck.

You can access the relevant file here: Download File