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Research on the intermediate phase of 40CrMnSiB steel shell under different heat treatments

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Defence Technology（防务技术） 2021年第3期17卷 1032-1041页

作者： Wei-bing Li Zhi-chuang Chen Xiao-ming Wang Wen-bin Li ZNDY of Ministerial Key Laboratory Nanjing University of Science and TechnologyNanjing210094China

In this study, 40 Cr Mn Si B steel cylindrical shells were tempered at 350, 500 and 600 ℃ to study the effect of tempering temperature on the dynamic process of expansion and fracture of the metal shell. A midexplosion recovery experiment for the metal cylinder under internal explosive loading was designed, and the wreckage of the casings at the intermediate phase was obtained. The effects of different tempering temperatures on the macroscopic and microscopic fracture characteristics of 40 Cr Mn Si B steel were studied. The influence of tempering temperatures on the fracture characteristic parameters of the recovered wreckage were measured and analyzed, including the circumferential divide size, the thickness and the number of the circumferential divisions. The results show that as the tempering temperature was increased from 350 to 600 ℃, at first, the degree of fragmentation and the fracture characteristic parameters of the recovered wreckage changed significantly and then became essentially consistent. Scanning electron microscopy analysis revealed flow-like structure characteristics caused by adiabatic shear on different fracture surfaces. At the detonation initiation end of the casing, fracturing was formed by tearing along the crack, which existed a distance from the initiation end and propagated along the axis direction. In contrast, the fracturing near the middle position consists of a plurality of radial shear fracture units. The amount of alloy carbide that was precipitated during the tempering process increased continuously with tempering temperature, leading to an increasing number of spherical carbide particles scattered around the fracture surface.

关键词： explosive mechanics Mid-explosion recovery experiment Explosion and fracture Heat treatment SEM(Scanning electron microscope)fracture analysis

Reliability Analysis for Air-Gap Detonation Transfer Interface by Numerical Simulation

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Journal of Donghua University(English Edition) 2015年第6期32卷 906-909页

作者：郭少伟李晓刚穆慧娜张瑶程立霍文彪 School of Mechatronical Engineering Beijing Institute of Technology 96630 Unit of the Chinese People's Liberation Army

In order to reduce the test samples in the reliability design and assessment,the function process of air-gap detonation transfer interface was simulated by LS-DYNA *** stress nephograms for the detonation transfer processes of six kinds of design parameters were *** results show that when the length of air-gap is between 2 and 18 mm,the detonation can be normally transferred which is consistent with the test result of NeyerD *** result has referential value for design and analysis of similar products.

关键词： explosive mechanics air-gap explosive interface function process numerical simulation

Research on the Application of explosive Network in the Shaped Charge Warhead

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Defence Technology（防务技术） 2011年第4期7卷 204-209页

作者：徐立新刘建荣赵广波于成大李昕张国伟 Unit No. 63961 PLA School of Mechatronic Engineering North University of China Jilin Military Representative Office

With respect to the problems of that the shaped charge warhead currently uses a cover method to improve the penetration power, a method using an explosive network technology as the detonation mode of shaped charge warhead is proposed. In the context of some shaped charge warhead, a synchronous explosive network prototype is designed according to some charge structure parameters, such as the liner and main grain. From the performance comparison test, it can be known that the explosive network not only stably detonates, but also largely improves the penetration power and stability. Experimental results show that explosive network technology is an effective method for improving the penetration power. The results lay a solid foundation for the engineering application of the technology in the shaped charge warhead.

关键词： explosive mechanics explosive network shaped charge liner warhead