Analysis and design for the comprehensive ballistic and blast resistance of polyurea-coated steel plate

Fragments and blast waves generated by explosions pose a serious threat to protective structures. In this paper, the impact resistance of polyurea-coated steel plate under complex dynamic loading is analyzed and designed for improving comprehensive ballistic and blast resistance using the newly established computational evaluating model. Firstly, according to the thickness and placement effects of the coating on the impact resistance, the steel-core sandwich plates are designed, which are proved to own outstanding comprehensive ballistic and blast resistance. Besides, the distribution diagram of ballistic and blast resistance for different polyurea-coated steel plates is given to guide the design of protective structures applying in different explosion scenarios. Furthermore, the dynamic response of designed plates under two scenarios with combined fragments and blast loading is studied. The results show that the synergistic effect of the combined loading reduces both the ballistic and blast resistance of the polyurea-coated steel plate. Besides, the acting sequence of the fragments and blast affects the structural protective performance heavily. It is found that the first loading inducing structural large deformation or damage is dominant. When fragments impact first, the excellent unit-thickness ballistic performance of the structural front part is strongly needed for improving the comprehensive ballistic and blast resistance.(c) 2021 China Ordnance Society. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).

Automated summary

This paper analyzes and designs the impact resistance of polyurea-coated steel plate under complex dynamic loading, aiming to improve comprehensive ballistic and blast resistance. The effects of coating thickness and placement on impact resistance are considered in the design of steel-core sandwich plates, which demonstrate excellent performance in both ballistic and blast resistance. The study also provides a distribution diagram of ballistic and blast resistance for different polyurea-coated steel plates, offering guidance for designing protective structures in different explosion scenarios. Moreover, the synergistic effect of combined fragments and blast loading on the dynamic response of designed plates is investigated, showing a reduction in both ballistic and blast resistance and emphasizing the significance of the acting sequence.