For decades, enhancing energy absorption and improving the dynamic fracture resistance of steel plate structures have been the focus of many research developments. Coating steel plates with a polyurea layer has proven to significantly affect the survivability of such structures under high intensity impulsive loads, including, those encountered in blast events. Polyurea is an inexpensive, fire-resistant, lightweight, soft, and abrasion-resistant retrofit for steel plates. It can be easily applied through spray-cast techniques to large steel panels. Over the last few decades, many researchers have investigated the use of polyurea as a protective coating material due to its ability to absorb a considerably higher amount of energy compared to most other similar coating materials. In recent years, researchers have focused on the application of polyurea to enhance the resistance of structures and systems against extreme impulsive loadings.
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