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[FAQ]

By default, WB LS-DYNA will always write INTFOR files for every simulation. Contact area is stored in INTFOR files if it is available. If the contact you are interested in is defined under Connections -> Contacts, you can run the model in WB LS-DYNA to create the INTFOR files and then obtain Contact Area from INTFOR files using LS-PrePost. If the contact you are interested in is defined in Connections -> Body Interactions, you need to insert Body Contact Tracker to scope to the contact and the body where you want to have the contact area. Then you can run the model in WB LS-DYNA to create INTFOR files if the parameters SPR and MPR in the K file are equal to 1 in the *CONTACT definitions. Otherwise, you need to use text editor to modify the K file by setting SPR = MPR = 1 on the *CONTACT definition. Then you can run the K file using ANSYS MAPDL Product Launcher or LS-Run. Once the calculation finishes, you can load the INTFOR files in LS-PrePost using File > Open > Interface Force File, then go to Post > History > Part to pick the part and select “Contact Area”. Finally, you can click on “Plot” to plot the time history of contact area.