Incorporating elastomers such as polymers in protective structures to withstand high energetic dynamic loads, has gained significant interest. The main objective of this study is to investigate the influence of a Polyurea coating towards the blast-induced response in steel plates. As such, Polyurea coated steel plates were tested under near-field blast loads, produced by the detonation of 1 kg of spherical nitromethane charges, at a standoff distance of 150 mm. Mild steel (XLERPLATE 350) and high-strength steel (BIS80) plates with thicknesses of 10 mm were Polyurea coated with thicknesses of 6 mm and 12 mm on either the front (facing the charge) or the back face. The deformation profiles were measured using 3D scanning. Numerical simulations were performed using the non-linear finite element code LS-DYNA. The strain-dependent behaviour of the steel and Polyurea were represented by Johnson-cook and Money-Rivlin constitutive models, respectively. The numerical models were validated by comparing the plate deflection results obtained from the experiments and were then used in the subsequent parametric study to investigate the optimum thickness of the Polyurea coating. The results indicate that back face coating contributes towards an approximately 20% reduction in the residual deformation as well as the absence of melting of the Polyurea layer, while the front-face coating can be used a means of providing additional standoff distance to the steel plates.

在保护结构中加入弹性体（如聚合物）以承受高能量动态载荷，引起了人们极大的兴趣。本研究的主要目的是研究聚脲涂层对钢板爆炸诱发响应的影响。因此，聚脲涂层钢板在近场爆炸载荷下进行了测试，该载荷由 1 公斤球形硝基甲烷装药在 150 毫米的间隔距离爆炸产生。厚度为 10 毫米的低碳钢 (XERPLATE 350) 和高强度钢 (BIS80) 板在正面（面向装料）或背面涂有 6 毫米和 12 毫米的聚脲涂层。使用 3D 扫描测量变形轮廓。使用非线性有限元代码 LS-DYNA 进行数值模拟。钢和聚脲的应变相关行为分别由 Johnson-cook 和 Money-Rivlin 本构模型表示。通过比较从实验中获得的板挠度结果来验证数值模型，然后将其用于随后的参数研究以研究聚脲涂层的最佳厚度。结果表明，背面涂层有助于减少约 20% 的残余变形以及聚脲层不熔化，而正面涂层可用作为钢板提供额外隔离距离的手段. 通过比较从实验中获得的板挠度结果来验证数值模型，然后将其用于随后的参数研究以研究聚脲涂层的最佳厚度。结果表明，背面涂层有助于减少约 20% 的残余变形以及聚脲层不熔化，而正面涂层可用作为钢板提供额外隔离距离的手段. 通过比较从实验中获得的板挠度结果来验证数值模型，然后将其用于随后的参数研究以研究聚脲涂层的最佳厚度。结果表明，背面涂层有助于减少约 20% 的残余变形以及聚脲层不熔化，而正面涂层可用作为钢板提供额外隔离距离的手段.