This project walks you through a complete explicit dynamics drop and multiple-impact simulation of a bicycle helmet, built entirely inside Ansys Workbench LS-Dyna. You will work with a clean, pre-defined CAD assembly, separating the helmet shell, crushable foam liner, elastic foam layer, and head form, then move through material definition, coordinate system setup, rigid wall configuration, and a full drop test run, before advancing to sequential multi-impact simulation using LS-Dyna Restart. What makes this project different from a typical single-hit drop test is the multi-impact workflow. Real helmet certification standards require testing the same helmet across repeated impacts, not just one, and this project shows you exactly how to configure a Small Restart in LS-Dyna to carry the deformed state from one impact into the next, at a new drop location and height, all within a single Workbench project. Alongside the LS-Dyna start file, you also get the clean Bicycle Helmet CAD files so you can study analysis-ready geometry firsthand: clean surfaces, no gaps, and no problematic features needed for a successful explicit dynamic simulation without meshing or contact failures.

This project walks you through a complete explicit dynamics drop and multiple-impact simulation of a bicycle helmet, built entirely inside Ansys Workbench LS-Dyna. You will work with a clean, pre-defined CAD assembly, separating the helmet shell, crushable foam liner, elastic foam layer, and head form, then move through material definition, coordinate system setup, rigid wall configuration, and a full drop test run, before advancing to sequential multi-impact simulation using LS-Dyna Restart. What makes this project different from a typical single-hit drop test is the multi-impact workflow. Real helmet certification standards require testing the same helmet across repeated impacts, not just one, and this project shows you exactly how to configure a Small Restart in LS-Dyna to carry the deformed state from one impact into the next, at a new drop location and height, all within a single Workbench project. Alongside the LS-Dyna start file, you also get the clean Bicycle Helmet CAD files so you can study analysis-ready geometry firsthand: clean surfaces, no gaps, and no problematic features needed for a successful explicit dynamic simulation without meshing or contact failures.