球形复合材料爆炸容器的动力响应和失效模式研究

We recently observed dynamic buckling failure mode of cylindrical composite explosion containment vessels, which may cause the failure of the vessel at low response deformation. The observed phenomenon combines effects of geometry nonlinearity, material nonlinearity and status nonlinearity，which is a critically fundamental problem in blast and impact dynamics mechanism. This phenomenon and the mechanism have not been reported in spherical composite explosion containment vessels so far and should be exploded. .In the proposed project, we will investigate the dynamic response and failure modes of spherical composite explosion containment vessels, which are made from single or filament wound of carbon and glass fibers with inner steel liner, employing analysis, numerical simulation and experimental study. The effects of blast loading, material parameters, wound method and structural dimensions on the dynamics will be obtained. The dynamic buckling failure mode and mechanism of spherical composite explosion containment vessels will be discovered, and the controlling method of dynamic buckling will be proposed. .This project will bring new contributions to the understanding of dynamic mechanical behaviour and mechanism of composite explosion containment vessels, which may incease the relevant foundation research level and the load-bearing capability of products. The research results can be applied to national defense and public security, and will be important and valuable for the storage, transportation and emergency disposition of weapon, ammunition and other explosive materials.

申请人近期在试验中发现了圆柱形复合材料爆炸容器的动力屈曲失效模式。动力屈曲会导致容器在较小变形下就发生失效，其中涉及到几何非线性、材料非线性和状态非线性等因素，是爆炸与冲击动力学研究中典型的关键基础科学问题，而此现象和机理在球形复合材料爆炸容器中尚未见报道。.本项目将以碳纤维和玻璃纤维等单一纤维或混杂纤维缠绕下含金属内衬的球形复合材料爆炸容器为研究对象，对容器的动力响应和失效模式开展系统的分析、数值模拟和试验研究。将获得爆炸载荷、材料性能、缠绕方式和结构尺寸等关键因素对动态力学行为的影响规律，揭示球形复合材料爆炸容器的动力屈曲失效模式和机理，提出有效控制动力屈曲的方法。.本项目将对复合材料爆炸容器的动态力学行为和机理带来新的认识，有助于提升复合材料爆炸容器的基础研究水平和产品抗爆性能，对国防和公共安全领域中武器、弹药及其它爆炸危险品的储存、运输和应急处置具有重要的应用价值。

为了给球形纤维复合材料爆炸容器的分析、设计和安全使用提供必要的理论指导，需要对结构的动力响应和失效模式开展深入和系统的研究。.本项目以碳纤维和玻璃纤维等单一纤维或混杂纤维缠绕下含金属内衬的球形复合材料爆炸容器为研究对象，对容器的动力响应和失效模式开展系统的分析、数值模拟和试验研究。提出了一种可适用于复合材料爆炸容器在内部爆炸载荷作用下动态响应过程的简化双层壳体模型，得到了带金属内衬的纤维复合材料壳体在内部均布三角脉冲作用下的动态响应解析解。建立了球壳在内部首个爆炸冲击波和准静压联合作用下的力学分析模型，获得了关键参数的影响规律。采用不同药量的爆炸加载试验，获得了碳纤维和玻璃纤维等单一纤维或混杂纤维球形容器的系列失效模式和关键薄弱位置，发现了纤维球壳和柱壳在内部爆炸作用下失效模式的不同。揭示了球形复合材料爆炸容器中动力屈曲行为的碰撞屈曲机理，提出了有效控制动力屈曲的方法。.本项目对球形复合材料爆炸容器的动态力学行为和机理带来了新的认识，有助于提升复合材料爆炸容器的基础研究水平和产品抗爆性能。对国防和公共安全领域中武器、弹药及其它爆炸危险品的储存、运输和应急处置的轻质高强抗爆装备设计研发具有重要的指导价值。