Assessment of portable FTIR and Raman spectroscopy for the detection of 2,3-dimethyl-2,3-dinitrobutane (DMDNB) in plastic explosives
April 2024
The Marplex Convention was established to prevent the manufacture of unmarked plastic explosives and stipulates that a volatile detection agent must be added at the time of manufacture. However, to-date,...
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Ballistic performance of spaced multi-ply soft fabrics: Experimental and numerical investigation
April 2024
It has been reported that the ply gap influences the ballistic resistance of spaced multi-ply fabric systems, but its working mechanism was not well-understood. This paper reports the experimental and...
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Study of damage behavior and repair effectiveness of patch repaired carbon fiber laminate under quasi-static indentation loading
April 2024
Damage caused due to low-velocity impacts in composites leads to substantial deterioration in their residual strength and eventually provokes structural failure. This work presents an experimental investigation...
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Synthesis and microwave absorption performance of heat-treated RF/SiO2 aerogels
April 2024
The well-designed composite with satisfactory electromagnetic microwave absorption at high temperatures remains a serious challenge. Herein, we fabricated a resorcinol-formaldehyde/silica dioxide composite...
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Revealing Al–O/Al–F reaction dynamic effects on the combustion of aluminum nanoparticles in oxygen/fluorine containing environments: A reactive molecular dynamics study meshing together experimental validation
April 2024
Improving the energy conversion efficiency in metallic fuel (e.g., Al) combustion is always desirable but challenging, which often involves redox reactions of aluminum (Al) with various mixed oxidizing...
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Random vibration analysis of FGM plates subjected to moving load using a refined stochastic finite element method
April 2024
The article introduces a finite element procedure using the bilinear quadrilateral element or four-node rectangular element (namely Q4 element) based on a refined first-order shear deformation theory...
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Research status and challenges in the manufacturing of IR conformal optics
Available online 27 April 2024
The infrared conformal window is one of the most critical components in aircraft. Conformal windows with high performance bring low aberrations, high aerodynamic performance, reliability in extreme...
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Discovering causal models for structural and construction engineering phenomena
Available online 27 April 2024
Causality, the science of cause and effect, has made it possible to create a new family of models. Such models are often referred to as causal models. Unlike those of mathematical, numerical, empirical,...
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Data-driven prediction of dimensionless quantities for semi-infinite target penetration by integrating machine-learning and feature selection methods
Available online 27 April 2024
This study employs a data-driven methodology that embeds the principle of dimensional invariance into an artificial neural network to automatically identify dominant dimensionless quantities in the...
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Investigation of system parameters towards safer impact based shock-to-detonation transition in a novel laser driven flyer plate prototype
Available online 26 April 2024
Laser driven flyer plate technology offers improved safety and reliability for detonation of explosives in industrial applications ranging from mining and stone quarrying to the aerospace and defense...
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Machine learning optimization strategy of shaped charge liner structure based on jet penetration efficiency
Available online 26 April 2024
Shaped charge liner (SCL) has been extensively applied in oil recovery and defense industries. Achieving superior penetration capability through optimizing SCL structures presents a substantial challenge...
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Properties of High cis-1,4 content hydroxyl-terminated polybutadiene and its application in composite solid propellants
Available online 25 April 2024
In this paper, high cis-1,4 content hydroxyl-terminated polybutadiene (cis-HTPB) with different molecular weights was prepared through the oxidative cracking process using cis-butadiene rubber as raw...
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Robust fixed-time flight controller for a dual-system convertible UAV in the cruise mode
Available online 23 April 2024
This paper investigates the attitude tracking control problem for the cruise mode of a dual-system convertible unmanned aerial vehicle (UAV) in the presence of parameter uncertainties, unmodeled uncertainties...
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Crack propagation and damage evolution of metallic cylindrical shells under internal explosive loading
Available online 23 April 2024
This paper investigates the three-dimensional crack propagation and damage evolution process of metallic column shells under internal explosive loading. The calibration of four typical failure parameters...
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Study on the coupling calculation method for the launch dynamics of a self-propelled artillery multibody system considering engraving process
Available online 22 April 2024
The launch dynamics theory for multibody systems emerges as an innovative and efficacious approach for the study of launch dynamics, capable of addressing the challenges of complex modeling, diminished...
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Model-driven full system dynamics estimation of PMSM-driven chain shell magazine
Available online 21 April 2024
Based on the system dynamic model, a full system dynamics estimation method is proposed for a chain shell magazine driven by a permanent magnet synchronous motor (PMSM). An adaptive extended state observer...
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Design and evaluation of a kind of polymer-bonded explosives with improved mechanical sensitivity and thermal properties
Available online 19 April 2024
The emergence of TKX-50, an energetic ionic salt with a high enthalpy of formation and low sensitivity, has opened a new path for the development of high-energetic, insensitive composite explosives....
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Assessment of electrostatic discharge sensitivity of nitrogen-rich heterocyclic energetic compounds and their salts as high energy-density dangerous compounds: A study of structural variables
Available online 16 April 2024
Nitrogen-rich heterocyclic energetic compounds (NRHECs) and their salts have witnessed widespread synthesis in recent years. The substantial energy-density content within these compounds can lead to...
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Synthesis and characterization of a 1,3-dibutylimidazolium azide ([BBIm][N3]) : A promising green energetic ionic liquid
Available online 16 April 2024
In the pursuit of advancing imidazolium-based energetic ionic liquids (EILs), the current study is devoted to the synthesis and characterization of 1,3-dibutyl-imidazolium azide ([BBIm][N3]), as a novel...
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Ballistic performance of titanium-based layered composites made using blended elemental powder metallurgy and hot isostatic pressing
Available online 15 April 2024
Metal matrix composites tiles based on Ti–6Al–4V (Ti64) alloy, reinforced with 10, 20, and 40 (vol%) of either TiC or TiB particles were made using press-and-sinter blended elemental powder metallurgy...
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Fluorinated semi-interpenetrating polymer networks for enhancing the mechanical performance and storage stability of polymer-bonded explosives by controlling curing and phase separation rates
Available online 10 April 2024
Herein, the effect of fluoropolymer binders on the properties of polymer-bonded explosives (PBXs) was comprehensively investigated. To this end, fluorinated semi-interpenetrating polymer networks (semi-IPNs)...
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Microfluidic preparation of surfactant-free ultrafine DAAF with tunable particle size for insensitive initiator explosives
Available online 10 April 2024
High purity and ultrafine DAAF (u-DAAF) is an emerging insensitive charge in initiators. Although there are many ways to obtain u-DAAF, developing a preparation method with stable operation, accurate...
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Analysis model for damage of reinforced bars in RC beams under contact explosion
Available online 6 April 2024
The load-bearing capacity of reinforced concrete (RC) beams primarily relies on internal reinforced bars. However, limited research has been conducted on the dynamic response of these bars. To address...
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A review on surface coating strategies for anti-hygroscopic of high energy oxidizer ammonium dinitramide
March 2024
Ammonium dinitramide (ADN), which has the advantages of high energy density, no halogen and low characteristic signal, is not only considered as a new high-energy oxidizer that is expected to replace...
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Vulnerability assessment of UAV engine to laser based on improved shotline method
March 2024
Laser anti-drone technology is entering the sequence of actual combat, and it is necessary to consider the vulnerability of typical functional parts of UAVs. Since the concept of "vulnerability" was...
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