In this tutorial, the damage and failure investigation of the CFRP composite military helmet under close blast explosion has been studied. The military helmet is a 3D shell part with eight different layers. The helmet part is imported to the Abaqus because of the part complexity. You can see a figure of the part below
Since World War I, helmets have been used to protect the head in warfare, designed primarily for protection against artillery shrapnel. More recently, helmet requirements have included ballistic and blunt trauma protection, but neurotrauma from the primary blast has never been a key concern in helmet design. Only in recent years has the threat of direct blast wave impingement on the head–separate from penetrating trauma–been appreciated. At present, no existing helmet is able to fully protect against all threats faced on the battlefield
The CFRP composite material with Hashin’s damage criterion is selected. The damage evolution is also used. The dynamic explicit step is appropriate for this type of analysis. The source point or the location of the explosive material and stand-off point are defined as two reference points. The CONWEP blast load procedure is considered for this model. The boundary condition is assigned to the helmet. The mesh should be fine to obtain correct results.
After the simulation, all results such as stress, damage and failure criterion, fiber tension and compression damage,…are available. You can see some figures for the results below
You can provide CAE ,INP, and English video files of this simulation here. The cost of these files is Twenty-Six Euros. you can click on the bellow bottom to beginning the process
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