bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on anti-infrared performance of organohalogen polymer smoke agent
Authors: Zhang Mingxing , Zhu Chenguang , Wang Yikai , Li Jingwei , Liu Feifan , Tang Jingshuang 
Published: June 2023

Abstract
Presented herein is an experimental study on the organohalogen polymer smoke agent. In smoke box experiment, the transmittance of smoke agent at 3-5 μm and 8-14 μm was used as the index, the effects of each factor on the anti-infrared performance of smoke agent were analyzed by orthogonal test method. The results showed that the main factors affecting the extinction properties of the organohalogen polymer smoke agent in the infrared band were zinc magnesium mass ratios of Zn-Mg alloy powders, Particle size of Zn-Mg alloy powders, and types of organohalogen polymer, and the secondary factor was the organohalogen polymer mass ratio. The transmittance of the best organohalogen polymer smoke agent composed of 30% Zn-10%Mg alloy powder (>325mesh), 50% CP-70, and 20% KClO4 to the 3-5μm and 8-14μm bands is 27.67% and 58.07%, respectively, and the corresponding TOP is 93.82 m2·kg1 and 39.69 m2·kg1. The combustion of the smoke agent composed of Zn-10%Mg alloy powder and Zn powder was compared in combustion experiment. The smoke agent composed of Zn-10%Mg alloy powder instead of Zn powder has a faster burning speed, larger burning flame area, and higher temperature.
Tailorable Energetic Behavior of Al/Ti/CuO Composites
Authors: Chang Y K , Zhao W J , Ren W , Nie J X , Wei C Q , Zhang H L , Zen X 
Published: June 2023

Abstract
Aluminum (Al)/Copper oxide (CuO) are mostly common thermites in energetic materials. However, the ignition and combustion of Al/CuO are constrained by the oxide shell coating on the Al core. Titanium (Ti) nanoparticles have been incorporated into Al/CuO system to tune their energetic behavior. The reactivity and combustion heat of Al/Ti/CuO ternary composites have been measured via combustion cell and calorimetry, respectively. The pressurization rate of Al/30% Ti/CuO (the molar percent of Ti in the fuel is 30%) and Al/70% Ti/CuO is 1 and 1.5 times greater than Al/CuO. Consequently, Ti nanoparticles are promising candidate for enhancinging the reactivity of Al/CuO thermites. The results also suggest that Ti nanoparticles could be employed as useful additive in Al-based thermites to tune their combustion behavior.
Initiation of PETN and HNS-IV Explosives by Laser Driven Al Flyer Plate
Authors: Aifeng He , Enyi Chu , Bo Jing , Chunqiang Cao , Jianhua Chen , Jia Zhao , Minjie Diwu 
Published: June 2023

Abstract
Initiation experiment of Pentaerythritol Tetranitrate (PETN) and Hexanitrostilbene IV(HNS-IV) explosives by laser driven flyer plate is conducted. By using an optimum selection of 5μm Al flyer and φ0.5×0.3 metal barrel, the explosive samples of about 1μm mean grain size and 90% theoretical maximum density(TMD) in a metal case are detonated successfully. The PETN has a much lower critical firing laser energy than HNS-IV, which is in accordance with the electrical slapper exploding practices. The much lower critical firing laser energy of the explosives makes it possible for safe transmission of laser by a fiber optic line with the core diameter no more than 600μm, and in turn makes it possible for the use of optical detonation technique in multipoint synchronous initiation of warheads.
Numerical and experimental investigation of a Mg/N2O powdered fuel rocket engine
Authors: Huang L Y , Meng L , Li P F , Yang H 
Published: June 2023

Abstract
Powdered metal fuel rocket engines, utilizing high energy density metal powder as fuel, have great potential in the development of propulsion systems for upper-stage rockets, and thrusters for attitude or trajectory control. The main challenges of this rocket engine technology currently lie in the realization of stable powder fuel supply, quick engine start-up, and high combustion efficiency. In this paper, we present a computational analysis of the reactive flow in a Mg/N2O powdered metal fuel rocket engine. Consideration in this work includes effects of a flame holder, mass flow rate ratio and entry angle of N2O on combustion efficiency. Based on the numerical simulation results, an experimental Mg/N2O powdered metal fuel rocket engine was designed, and working processes of the engine were investigated through hot fire tests with Mg powder as fuel and N2O as oxidant. A ground test system, consisting of a high-precision test bench, a fuel feed unit, an oxidant feed unit, and a measurement and control unit, was established. The test results show that the combustion of Mg powder and N2O can be sustained.
The Influence of the Material and Thickness of the Barrel on the Speed of Flying Plates
Authors: Zhou Mi , Men Qingying , Tong Honghai , Wang Yin , Li Jiao 
Published: June 2023

Abstract
In order to reduce the ignition energy of the slapper plate detonator and optimize its performance, for the slapper plate detonator with the size of 0.4mm × 0.4mm × 5µm and the thickness of the flying plate 25µm, the material and diameter of the barrel were optimized by using photon Doppler velocity testing technology (PDV). Three kinds of materials including ceramic, sapphire and stainless steel and accelerating bore with thickness 0.3mm, 0.45mm and 0.6 mm are analyzed.. The experimental results show that: at the same discharge voltage, the ceramic barrel flyer The speed of the sapphire barrel is the highest. The speed of the flyer of the sapphire barrel is basically the same as that of the ceramic barrel. The barrel made of stainless steel has the lowest speed of the flyer. For the ceramic barrel of different thicknesses, the speed of the flyer is compared. The ceramic barrel with a thickness of 0.45mm is in displacement. The acceleration inflection point appears at 0.45mm, at this time, the parameter state of the shock sheet detonator and the initiation circuit have reached a best matching state.
Preparation and properties of spherical super thermite for 3D printing of energetic materials
Authors: Qi Z Y , Yao W S , Zhang M H , Xia M , Luo Y J 
Published: June 2023

Abstract
3D printing technology is a new rapid prototyping technology that has attracted much attention since its inception. It is promising to apply 3D printing technology to energetic materials. However, the 3D printing of energetic materials requires high raw materials, and there is no suitable thermite powder as the printing raw materials at present. In this paper, Al@CuO energetic composites with single core spherical core-shell structure were prepared by spray drying method. The prepared powder was confirmed to have a single core spherical core-shell structure by SEM/EDS/XRD, and it was proved to have good fluidity by the fluidity test. High-speed photographic ignition tests show that the Al@CuO Micron spheres have excellent energy release performance and can be used as burning rate catalysts. In addition, this method has the advantages of simple operation, good process performance, mass preparation, and can be applied to the thermite system of most metal oxides (such as Bi2O3, Fe2O3).
Damage performance of a shaped charge liner fabricated from Ti-29Nb-13Ta-4.6Zr alloy
Authors: Wang C T , Hu X B , Ji C , Guo Z P , Guo L , He Y 
Published: June 2023

Abstract
The change of the liner material directly affects the penetration and damage performance of the shaped charge. In this paper, Ti-29Nb-13Ta-4.6Zr (TNTZ) was used as the charge liner. Autodyn software was used to analyze the jet formation of TNTZ liner, then static explosion test was conducted to analyze the penetration and damage performance of charge liners. The following conclusions were obtained: A charge liner structure was proposed for TNTZ alloy, the simulation shows that a jet with acceptable L/D ratio was formed, and the jet head velocity was around 6000 m/s. The TNTZ charge liner successfully ignited fuel tank after penetrating steel target due to chemical reaction. For the tests on C35 concrete targets, the TNTZ liner has horizontal damage effect which leads to penetration tunnel with large diameter, however the penetration depth is smaller compared to Cu liner. Such behavior makes TNTZ liner a good candidate as forward shaped charge of tandem warheads.
Research on ignition and reaction characteristic of PTFE-based reactive materials
Authors: Xie Zhi-yuan , Wang Yan-xin , Xu Rui-ze , Xiao Jian-guang 
Published: June 2023

Abstract
In order to study the ignition characteristic of PTFE-based reactive materials (RMs), Al/W/PTFE RMs with different W powder contents were prepared and split Hopkinson pressure bar (SHPB) test was carried out under different loading conditions. The temperature rise of three RMs were calculated theoretically. The material model parameters of the three formulations were calculated by using the mixture equation of state theory and Johnson-cook model, and the impact process was numerically simulated by using AUTODYN dynamics software. The results showed that the Al/PTFE (26.5/73.5) formula material has ignition reaction when the impact speed is 27.47m/s, and Al/W/PTFE (7.94/45.33/46.73) formula material is 28.68m/s. Al/W/PTFE (5.29/80/14.71) only has weak ignition reaction under experimental conditions. The ignition reaction of RMs is related to the impact temperature rise. Under the impact condition, local high temperature induced ignition occurred at the crack of RMs.With the increase of W powder content, the overall temperature rise of RMs decreased, and the reaction degree of RMs decreased.
Ignition delays of two ADN/GAP mixtures irradiated by a CO2 laser: atmospheric experiments and numerical calculations
Authors: Li H , Hao H X , Li M , Zhang Y 
Published: June 2023

Abstract
The ignition experiments of two ADN/GAP mixtures irradiated by a CO2 laser were conducted to investigate the dominant mechanism of ignition induced process. The power law exponents of experimental curves for ignition delay versus laser power density are all closed to -1. Two reduced numerical models were employed to calculate the ignition delay times against the experimental data. The analysis suggested that the ignition delays of ADN/GAP mixtures related to the corresponding burning rates and the ignition delay behaviours followed a fixed energy pattern approximately. The calculation results indicated that the measured ignition delay time might be mainly dominated by the formation of preheating layer for steady state burning.
Density distribution characteristics of the explosively formed reactive material jet
Authors: Guo H G , Zhang J H , Liu C Z , Wang H F 
Published: June 2023

Abstract
The density evolution behaviour and distribution characteristics of the explosively formed reactive material jet were studied based on the SPH algorithm. Numerical simulations show that the reactive material jet has obvious expansion phenomenon under the shaped charge effect. Especially, the expansion and divergence of the jet head are obvious. In general, the density deficit occurs in the whole reactive material jet, and the density increases from the jet head to the tail. Compared with the initial density of the reactive liner material, the density of jet head decreases by about 30%. In addition, the effect laws of the reactive liner thickness, the liner cone angle, and the type of explosive on the jet density distribution were investigated. With increasing of the reactive liner thickness, increasing of the liner cone angle, and decreasing of the explosive detonation pressure, the proportion of the high-density area on the reactive jet and the average density of the jet head increase.
A unified method for studying impact particle relation and spallation under shock loading
Authors: Ma R. , Ren K.R , Chen R. 
Published: June 2023

Abstract
Spallation is the phenomenon that under impact loading, the material interior reaches the tensile failure limit instantaneously due to the tensile effect of two sparse waves moving in opposite directions, and cracks are formed in the interior. The specimen of a certain alloy was taken as the research object, and the planar impact experiment was carried out by a 20mm caliber one-stage light gas gun. The free surface particle velocity curve of the alloy specimen was obtained. The Hugoniot state parameters, spallation strength, unloading strain rate and other experimental data were obtained through theoretical analysis. The results show that: The spall strength of the alloy is proportional to the tensile strain rate in the loading range: σs
= 0.37 × 10-4

ε

·

(GPa); the alloy has higher wave impedance and spallation strength compared with C10100. The experimental parameters of Hugoniot state are smaller than those calculated by the mass average method because of the special internal structure of the alloy. The state parameters of the sample can be obtained at the same time by using the material with known Hugoniot state parameters as the flyer.
Theoretical analysis for the axial tensile response of the mesoscopic model for filament-wound composites
Authors: Yin Dongmei , Li Zhenxiao 
Published: June 2023

Abstract
A theoretical analysis approach of the mechanical response of mesoscopic model of filament wound composites under the axial tension is provided in this work. In this method, a rhombus representative volume element (RVE) is selected according to the winding patterns, which is further divided into several length scales. Based on the iso-strain and iso-stress assumptions, combining bridging theory and homogenization, equivalent stiffness matrix of the structure in each scale is obtained. Then theirs’ three dimension (3D) equivalent elastic constants can be forecasted. Some elastic constants of the macro structure are compared with those gained by experiment and classical laminate theory (CLT) model. The comparison results verify the reliability of this model to a certain extent. According to the equivalent stiffness matrix of the structure in each scale, the equivalent stresses and strains of these structures under the axial tensile load are calculated. Stresses of fiber tows and matrix in each unidirectional layer are computed by using the bridging model. Considering the stress concentration factors of matrix, the damage of the mesoscopic structure is obtained based on the failure criteria of constituents. The locations of damage are verified by the numerical simulations in the references.
Properties of Aramid Fibers And Their Composites Based on Atomic/Molecular Scale Simulation Technology: A Review
Authors: Jingli Xu , Shuhu Li , Jianfen Guo , Haiyan Zang , Jianqin Zhang , Haiyun Zhang , Danyong Wang , Yiwei Chen 
Published: June 2023

Abstract
Atomic or molecular simulation technology is gradually used in the performance simulation of organic ballistic fibers and their composites, to reveal their various performance mechanisms and evolutionary mechanisms from the molecular point of view. Atomic or molecular simulation technology in the mechanical properties, thermal properties, aging properties, properties of aramid fiber composite fibers, and interface properties of aramid fiber-reinforced composites are summarized in this paper.
Thermo-Structure Approach to Dissimilar Explosive Cladding with Interlayer
Authors: Saravanan S. 
Published: June 2023

Abstract
A thermodynamic model capable of predicting the change in internal energy, work done, and thermal energy required during aluminum-stainless steel explosive cladding is presented. The mathematical model is instrumental in determining the temperature and pressure developed at the interface, which characterizes the interface microstructure, compared with the numerical simulation. Numerical simulation is implemented by the Smoothed Particle Hydrodynamics method available in ANSYS Autodyn. Furthermore, the effect of different interlayers, such as Al 1100, copper, and SS 304, on kinetic energy utilization and deformation work is discussed. The increase in ram tensile and shear strengths is also reported.
The composite laminate design and manufacture based on wrapped ply
Authors: guo Jianfen , zhang haiyun , jia huamin , gao shouzhen 
Published: June 2023

Abstract
This paper analyzes the layup design and manufacture of composite laminate with inserts on the surface of revolution, and points out that both the interior surfaces and the outer surfaces should be laid as a full-body ply. Utilize 3D design software Catia and composite design software Fibersim, carry out digital layup and producibility simulation of the product, design wrapped plies for the interior surface and outer surface with complex structures, simulate and adjust the laying process, and make the fiber deformation of the entire surface reasonable. Flat patterns of the plies are provided for material cutting. For the layup of thicker area and transition area of the product, the layup design and production data and suggestions are also given. The scheme and data of layup are well used in guiding production and improving production efficiency and product quality.
Research on key technologies for autonomous vehicles
Authors: Yu Duan , Fanqing Gao , Bu Lü , Xulin Chen , Xundong Yang 
Published: June 2023

Abstract
With the advancement of science in the world, Artificial Intelligence is also developing rapidly. Currently, the traditional automobile industry is making significant efforts to develop autonomous driving technology based on the development of AI. The research focuses on key technologies for autonomous vehicles, systematically analyzing environmental perception, behavioral decision-making, path planning, and vehicle lateral or longitudinal motion control systems.
Quantitative Investigation of Ballistics Flow Fields by Background Oriented Schlieren Technique
Authors: Moumen A , Laboureur D , Gallant J , Hendrick P 
Published: June 2023

Abstract
The ballistics field is known by the presence of several complex phenomena such as muzzles and flying projectiles flow fields. Consequently, numerical simulations are commonly used to model these complicated flows. However, the validation process of these codes has proven to be problematic due to the lack of experimental quantitative data. In this context, the present paper describes the application of the Background Oriented Schlieren technique (BOS) as a quantitative investigation tool in the ballistics field. We illustrate that BOS can accurately capture the main characteristics of the studied configurations: Firstly, we discuss the visualization and the density field reconstruction around a Bullet Simulated Projectile BSP flying at supersonic velocities and a sniper projectile flying at supersonic and transonic velocities. We demonstrate that these fields are in satisfactory agreement with the results of Taylor and Maccoll’s equation and numerical simulation. Then, the findings of the BOS visualization of the precursors and the propellant flow fields are presented. To this end, the salient features accurately captured by the BOS technique such as vortex rings, shock bottles, Mach, and blast wave are described both qualitatively and in terms of density profiles. Two improved approaches that are essential to the aforementioned analysis are proposed: the first is related to density field reconstruction based on Abel inversion and the second approach is a phase separation procedure.
Low-light image enhancement based on simulated multi-exposure fusion
Authors: Han Yongcheng , Zhang Wenwen , He Weiji 
Published: June 2023

Abstract
We propose an efficient and novel framework for low-light image enhancement, which aims to reveal information hidden in the darkness and improve overall brightness and local contrast. Inspired by exposure fusion technique, we employ simulated multi-exposure images fusion to derive bright, natural and satisfactory results, while images are taken under poor conditions such as insufficient or uneven illumination, back-lit and limited exposure time. Specifically, we first design a novel method to generate synthesized images with varying exposure time from a single image. Thus, each image of these artificial sequences contains necessary information for the final desired enhanced result. We then introduce a flexible multi-exposure fusion framework to achieve fused images, which comprises a weight map prediction module and a multi-scale fusion module. Extensive experiments show that our approach can achieve similar or better performance compared to serval state-of-the-art methods.
Segmentation Clustering Algorithm for Point Cloud Processing of Targets on The Ground
Authors: Huang Jinbo , Zheng Zhen , Zhang Yifei , Zhou Yu 
Published: June 2023

Abstract
After the ground extraction algorithm, there are multiple objects, including the target in the non-ground point cloud. To effectively extract the features of individual objects and overcome the dependence of the traditional algorithm based on the normal vector and curvature of the region growing point cloud segmentation method on the initial point, the normal vector angle in the neighborhood, and the curvature threshold selection. In this paper, we propose a fast clustering segmentation method for region-growing point clouds based on neighborhood density. The test results show that the point cloud segmentation algorithm proposed in this paper has better performance than the traditional Euclidean clustering point cloud segmentation algorithm and region growing point cloud segmentation algorithm in terms of timeliness and correct segmentation rate. This new segmentation clustering algorithm can quickly implement automatic point cloud clustering segmentation of ground objects.
Point Cloud Target Registration Algorithm Based on Local Feature Description
Authors: Wang Chengjun , Zha Binting 
Published: June 2023

Abstract
Point cloud data has received extensive attention in the field of target recognition and target tracking due to its rich target information, and point cloud registration is one of the basic tasks in point cloud applications. Aiming at the problem that the feature descriptor in the traditional registration algorithm is complicated to calculate and cannot sufficiently describe the features of the point cloud, this paper proposes a local feature descriptor that integrates the local normal vector angle features, projection distance features, and distribution density features of the point cloud. The feature similarity is introduced to determine the corresponding point pairs between the template point cloud and the target point cloud, and the point cloud registration task is completed based on local feature matching. Experiments show that the feature descriptor in this paper is simple to calculate and can sufficiently describe the local features of the point cloud, a good correspondence between points can be established based on the feature descriptor, and the algorithm has good robustness. The registration algorithm proposed in this paper can provide a reference for the fields of target recognition and target pose estimation, etc.
Impact of Air Quality on Millimeter Wave Transmission Performance
Authors: Wu Hongming , Wang Ningbo , Wang Yelong , Wang Jinkuan 
Published: June 2023

Abstract
In this paper, we use millimeter wave radar to conduct outdoor experiments under different air quality conditions and analyze the degree of millimeter wave transmission attenuation. The radar we use operates at 94 GHz with a bandwidth of 1 GHz, a distance resolution of 15 cm, and a maximum detection distance of about 150 meters. We mainly use PM2.5 and PM10 indices as air quality criteria and find that the reflected signal strength of millimeter wave from 90m to 150m decreases by 0.38dB when the air quality rises from 136 to 250, indicating that the weaker the air quality, the weaker the millimeter wave signal strength. This provides an experimental basis for the field of millimeter wave communication.