Hi Camilla,

What you described might need a full restart, but if you have access to Ansys Learning Hub (ALH), the 3rd lesson of the following course describes the use of small restarts capabilities of Workbench LS-DYNA for subsequent impacts of a bicycle helmet model that may be helpful to you:

SuccessFactors Learning: Item Details for Drop Test Simulation Using Ansys Workbench LS-DYNA (