聚脲弹性体在爆炸防护中的研究进展

从力学性能、防护结构应用研究、吸能机理三个方面综述了聚脲弹性体在爆炸防护中的研究进展。聚脲弹性体的静/动态力学性能优异,断裂伸长率高、应变率效应强,在增强墙体、金属及复合材料等多种防护结构抗冲击性能方面的研究取得了重要进展,获得了一些规律性认识,包括聚脲弹性体在防护结构中的位置、质量比重等因素对抗爆性能的影响以及聚脲弹性体在墙体、金属、复合材料等不同结构中增强抗爆性能的机理。分析认为聚脲弹性体在爆炸防护中具有很大的应用潜力,指出未来需进一步研究聚脲弹性体的本构关系、影响聚脲弹性体抗爆性能的因素、防护结构尺寸效应与聚脲弹性体的微观吸能机理。

Review on Using Polyurea Elastomer for Enhanced Blast-mitigation

From three aspects of mechanical behavior, application research of protective structures and energy-mitigation mechanism, the research progress in using polyurea elastomer for enhanced structural protective performance under blast and impact loading was reviewed. Polyurea elastomer possesses many desirable properties including ease of application, rapid cure time, adhesive property and excellent quasi-static and dynamic mechanical properties, particularly high strain rate dependence and elongation. It is considered that polyurea elastomer for enhanced structural protective performance including concrete masonry wall, metal structure and nonmetal composite material structure has made important progress. Some regular knowledge including effects of the location and the quality ratio of the polyurea elastomer in the composite structure on the anti-detonation performance, the mechanism of using polyurea elatomer for enhanced anti-detonation performance in various composite structures has been obtained. Also, polyurea elastomer is considered as a great potential material in explosion protection field. Simultaneously, it is pointed out that present research is scattered and lacks unsystematic. In the future, more precise constitutive model, the factors affecting the blast resistance of polyurea elastomer, the micro-energy mitigation mechanism of polyurea elastomer and the dimensional effect of protective structure are needed to be studied further.