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首页> 美国卫生研究院文献>Polymers >The Influence of Spraying Strategy on the Dynamic Response of Polyurea-Coated Metal Plates to Localized Air Blast Loading: Experimental Investigations
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The Influence of Spraying Strategy on the Dynamic Response of Polyurea-Coated Metal Plates to Localized Air Blast Loading: Experimental Investigations

机译：喷涂策略对聚脲涂层金属板对局部鼓风载荷动力响应的影响：实验研究

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Polyurea has attracted considerable attention owing to its potential applications in protective fields to improve the resistant performance of structures subjected to damage loads resulting from intentional or accidental explosions. However, different spraying strategies of polyurea may lead to significant differences in overall resistance performance of polyurea-coated structures, and the underlying mechanisms have not been clear until now. This study aims to elucidate the influence of spraying strategy, i.e., spraying area, spraying thickness, and spraying interface condition, on the dynamic response of polyurea-coated steel plates under localized air blast loading. Three types of plates manufactured using different spraying strategies were adopted to evaluate their blast-resistant performance. The spraying strategies used were (i) whole-area spraying, (ii) partial-area spraying, and (iii) in-contact backing of polyurea on the rear surfaces of steel plates. In addition, the influence of spraying thickness of polyurea for whole-area sprayed plates was evaluated. The energy absorbing mechanisms of polyurea backing layers were highlighted. The energy absorption of plates was quantitatively analyzed. The results show that the air blast resistances of whole-area sprayed and in-contact backed plates are both superior to, whereas that of partial-area sprayed plates is inferior to, bare steel counterparts. A suitable spraying thickness of polyurea can significantly reduce the damage of the front steel layer, whereas excessive spraying thickness decreases the overall air blast resistance of plates. The polyurea backing layer exhibits favorable performance in absorbing energy under a whole-area spraying condition. This study provides useful guidance for the design of polyurea-coated metal plates in engineering applications.
机译：聚脲由于其在保护领域中的潜在应用而得到了相当大的关注，以提高承受因有意或无意爆炸而造成的破坏载荷的结构的耐性。但是，不同的聚脲喷涂策略可能会导致聚脲涂层结构的整体抗力性能出现显着差异，并且到目前为止，其潜在机理尚不清楚。这项研究的目的是阐明喷涂策略（即喷涂面积，喷涂厚度和喷涂界面条件）在局部鼓风载荷下对聚脲涂层钢板动态响应的影响。采用三种使用不同喷涂策略制造的板来评估其抗爆炸性能。使用的喷涂策略是（i）全面积喷涂，（ii）部分面积喷涂和（iii）聚脲在钢板背面的接触衬里。另外，评价了聚脲的喷涂厚度对全面积喷涂板的影响。重点介绍了聚脲背衬层的能量吸收机理。定量分析板的能量吸收。结果表明，全面积喷涂和接触内衬背板的抗空气冲击性均优于裸钢板。合适的聚脲喷涂厚度可以显着减少前钢层的损坏，而过多的喷涂厚度则会降低钢板的整体抗空气冲击性。聚脲背衬层在全面积喷涂条件下表现出良好的吸收能量的性能。该研究为工程应用中聚脲涂层金属板的设计提供了有用的指导。

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