Research On Anti-penetration Performance Of Marine Protective Module Based On Fiber Reinforcement

Ultrahigh molecular weight polyethylene fiber reinforced composites(UHMWPE)are widely used in various kinds of protective equipment because of their properties such as light weight,high strength and excellent penetration resistance.In this paper,the ultrahigh molecular weight polyethylene fiber reinforced composite is combined with metal material,and the metal material is used as the outer layer protection,which can not only wear the projectile,but also slow down the performance decline of the polymer material.The Marine protection module with good penetration resistance is obtained through structural optimization design.This paper first describes the background and significance of ship protection and introduces the research status and development of protective materials.The quasi-static and dynamic mechanical properties of high strength aluminum alloy,weft free cloth laminated board,three-dimensional fabric composite board and other related components involved in the Marine protection module were studied by using universal testing machine and Hopkinson tie bar device,and corresponding constitutive equations were fitted based on the experimental results.Then,the penetration response experiments of various Marine protection modules are carried out,and the experimental results are analyzed and compared.The numerical simulation method of penetration is established and optimized.Based on numerical simulation,the influences of the structural form of the protection module,the thickness of the facing panel and the back panel,the arrangement order of each component and the number of layered interfaces of the weft free lamination panel on the penetration resistance of the Marine protection module are systematically studied.Combining the results of experiment and numerical calculation,the structural form of Marine protection module is optimized,and the empirical formula of predictable ballistic limit is obtained by fitting,so as to provide reference for production design.The main research contents and conclusions are as follows:(1)Mechanical properties parameters of components used in Marine protection module in this paper were obtained by using universal testing machine,which provided reliable parameters for numerical analysis.(2)Fiber material pull rod samples were designed based on Hopkinson pull rod device.Strain rate effect of UHMWPE fiber reinforced composite was studied experimentally.Constitutive equation of weft free cloth laminated plate and three-dimensional fabric composite plate was fitted according to stress-strain relationship.(3)Penetration experiments were conducted on the target plate of ship protection module and the target plate of Marine protection module respectively with 7.62 mm common steel core rifle to study the penetration response and failure mode of the target plate.(4)Finite element software ANSYS/LS-DYNA was used to simulate the penetration process and failure forms of various target plates,and the accuracy and reliability of the simplified numerical model proposed in this paper were verified through experiments,and the error range of numerical simulation was given.(5)Protection module is analyzed by numerical simulation in the panel,the proportion of weft cloth and filling sequence and three-dimensional fabric components without weft cloth component layers three kinds of structure forms of change,the influence law of protection module penetration resistance,get thin aluminum alloy into play,not hierarchical components without weft cloth,three-dimensional fabric thick aluminum alloy back playing surface components,the optimal combination.(6)Calculate the ballistic limit of the protection module through theoretical research and data fitting.The relationship between different target plate structure and ballistic limit and the empirical formula between fitting component thickness and ballistic limit are studied.