Defence Technology(防务技术)最新文献_第7页

Response of underwater cylindrical shell subjected to supercavitating projectile trans-medium penetration: Experiment and simulation 超空泡弹丸跨介质侵彻水下圆柱壳的响应：实验与仿真

IF 5.9

Defence Technology(防务技术) Pub Date : 2025-08-01 DOI: 10.1016/j.dt.2025.03.002

Yiming Ma, Kui Tang, Lingquan Kong, Hanxin Gong, Minhui Gu, Chao Cao, Jinxiang Wang

{"title":"Response of underwater cylindrical shell subjected to supercavitating projectile trans-medium penetration: Experiment and simulation","authors":"Yiming Ma, Kui Tang, Lingquan Kong, Hanxin Gong, Minhui Gu, Chao Cao, Jinxiang Wang","doi":"10.1016/j.dt.2025.03.002","DOIUrl":"10.1016/j.dt.2025.03.002","url":null,"abstract":"<div><div>To investigate the dynamic response of the cylindrical shell targets to supercavitating projectile trans-medium penetration and the penetration mechanism, experiments and numerical simulations were conducted. Simulations examined the effects of entry water velocity and impact angle on penetration behavior. The results indicate that, upon water entry, the supercavitating projectile transfers its kinetic energy to the surrounding water medium, causing a sudden rise in local pressure. This creates an approximately hemispherical pressure field in the water medium ahead of the nose of the projectile, where the pressure distribution and magnitude are positively correlated with the velocity of the projectile. As the pressure field approaches the cylindrical shell, the area around the impact point experiences pre-stress and deformation due to the hydrodynamic pressure, which is known as the hydrodynamic ram effect. The deformation of the cylindrical shell caused by the hydrodynamic ram effect increases with increasing velocity of the projectile and exhibits a non-linear relationship with the impact angle, first decreasing and then increasing as the impact angle rises. Additionally, the hydrodynamic ram effect leads to greater local deformation and higher peak stresses in the cylindrical shell, which reduces the penetration drag force faced by the projectile in water compared to air, indicating a lower ballistic limit for underwater targets. During the penetration process, as the impact angle increases, the supercavitating projectile undergoes repetitive bending deformation and even brittle fracture, while the failure mode of the target is characterized by ductile hole expansion. Furthermore, the critical penetration velocity required to perforate the cylindrical shell target increases with increasing impact angle.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"50 ","pages":"Pages 304-323"},"PeriodicalIF":5.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on the anti-penetration characteristics of liquid-filled structure with air layer 带空气层充液结构抗侵彻特性的实验研究

IF 5.9

Defence Technology(防务技术) Pub Date : 2025-08-01 DOI: 10.1016/j.dt.2025.03.023

Mengmeng Wu , Jian Jin , Hailiang Hou

{"title":"Experimental study on the anti-penetration characteristics of liquid-filled structure with air layer","authors":"Mengmeng Wu , Jian Jin , Hailiang Hou","doi":"10.1016/j.dt.2025.03.023","DOIUrl":"10.1016/j.dt.2025.03.023","url":null,"abstract":"<div><div>The study aims to explore the damage characteristics and protection technologies of liquid-filled structures under high-speed projectile impact. A series of penetration impact experiments were conducted by focusing on different air layer configurations. By using high-speed camera and dynamic measurement systems, the effects of air layers on the projectile penetration, pressure wave propagation, cavitation evolution, and structural dynamic responses were analyzed. The results showed that the rarefaction wave reflected from the air-liquid interface significantly reduced the peak and specific impulse of the initial pressure wave, thereby diminishing the impact load on the structure. Additionally, the compressibility of air layers also attenuated the cavitation extrusion load. Both front and rear plates exhibited superimposed deformation modes, i.e., local deformation or petal fracture with global deformation. Air layers effectively mitigated global deformation. However, when the air layer was positioned on the projectile's trajectory, it split the water-entry process and velocity attenuation of the projectile into two relatively independent phases. And the secondary water entry pressure wave caused more severe local deformation and petal fractures on the rear plate.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"50 ","pages":"Pages 185-202"},"PeriodicalIF":5.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of energetic semiconductor Bridge with high efficiency, accuracy and low cost by 3D direct writing 三维直写技术制备高效率、高精度、低成本的高能半导体桥

IF 5.9

Defence Technology(防务技术) Pub Date : 2025-08-01 DOI: 10.1016/j.dt.2025.04.007

Yongqi Da , Jiangtao Zhang , Fuwei Li , Yuxuan Zhou , Jianbing Xu , Yinghua Ye , Ruiqi Shen

{"title":"Fabrication of energetic semiconductor Bridge with high efficiency, accuracy and low cost by 3D direct writing","authors":"Yongqi Da , Jiangtao Zhang , Fuwei Li , Yuxuan Zhou , Jianbing Xu , Yinghua Ye , Ruiqi Shen","doi":"10.1016/j.dt.2025.04.007","DOIUrl":"10.1016/j.dt.2025.04.007","url":null,"abstract":"<div><div>Enhancing the output capacity of semiconductor bridge (SCB) through the application of composite nano-energetic films is a subject of wide concern. Furthermore, improving the safety, reliability, and production efficiency of energetic semiconductor bridge (ESCB) is the primary focus for large-scale engineering applications in the future. Here, the Al/CuO nano-film ESCB was efficiently fabricated using 3D direct writing. The electrostatic safety of the film is enhanced by precisely adjusting the particle size of Al, while ensuring that the SCB can initiate the film with small energy. The burst characteristics of SCB/ESCB were thoroughly investigated by employing a 100 μF tantalum capacitor to induce SCB and ESCB under an intense voltage gradient. The solid-state heating process of both SCB and ESCB was analyzed with multi physical simulation (MPS). The experimental results demonstrate that the critical burst time of both SCB and ESCB decreases with increasing voltage. Under the same voltage, the critical burst time of ESCB is longer than that of SCB, primarily due to differences in the melting to vaporization stage. The MPS results indicate that the highest temperature is observed at the V-shaped corner of SCB. Due to the thermal contact resistance between SCB and the film, heat conduction becomes more concentrated in the central region of the bridge, resulting in a faster solid-state heating process for ESCB compared to SCB. The results of the gap ignition experiments indicate that at a 19 mm gap, an ESCB with a film mass of 10 mg can ignite nickel hydrazine nitrate (NHN) and cyclotrimethylenetrinitramine (RDX). This suggests that thermite ESCB can serve as a novel, safe, and reliable energy exchange element and initiator in large-scale engineering applications.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"50 ","pages":"Pages 69-82"},"PeriodicalIF":5.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144810024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Safety assessment of framed hot launch departure for sea-based rockets in rough sea conditions 恶劣海况下海基火箭框架热发射离场安全评价

IF 5.9

Defence Technology(防务技术) Pub Date : 2025-08-01 DOI: 10.1016/j.dt.2025.03.017

Deng Wang , Jianshuai Shao , Nan Cao , Yi Jiang , Tong Huang

{"title":"Safety assessment of framed hot launch departure for sea-based rockets in rough sea conditions","authors":"Deng Wang , Jianshuai Shao , Nan Cao , Yi Jiang , Tong Huang","doi":"10.1016/j.dt.2025.03.017","DOIUrl":"10.1016/j.dt.2025.03.017","url":null,"abstract":"<div><div>Sea-based rocket launches encounter significant challenges stemming from dynamic marine environmental interactions. During the hot launch phase, characterized by low-velocity ascent, the departure of the rocket from the oscillatory platform exhibits heightened sensitivity to external disturbances. In the development stage, assessing the launch dynamics and the clearance between the rocket and framed launcher are crucial for improving the reliability of sea-based rocket launches in rough sea conditions. This study presents a high-fidelity dynamic model of maritime hot launch system, demonstrating 3.21% prediction error through rigorous validation against experimental datasets from comprehensive modal analyses and the full-scale rocket flight test. To mitigate collision risks, we develop a computational method employing spatial vector analysis for dynamic measurement of rocket-launcher clearance during departure. Systematic investigations reveal that in rough sea conditions, optimal departure dynamics are achieved at <em>θ</em><sub>thrust</sub> = 270° nozzle azimuth configuration, reducing failure probability compared to conventional orientations. The developed assessment framework not only resolves critical safety challenges in current sea launch systems but also establishes foundational principles for optimizing adapter axial configuration patterns in future designs.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"50 ","pages":"Pages 83-100"},"PeriodicalIF":5.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144810025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bimetallic MOF (Mn/Co) constructed by active dicyandiamide linker for a promising combustion catalyst of solid propellant 活性双氰胺连接剂构建的双金属MOF （Mn/Co）是一种很有前途的固体推进剂燃烧催化剂

IF 5.9

Defence Technology(防务技术) Pub Date : 2025-08-01 DOI: 10.1016/j.dt.2025.04.005

Mingcheng Ge , Xian Xu , Ze Su , Ye Zhong , Binfang Yuan , Huisheng Huang , Jianguo Zhang , Zhimin Li

{"title":"Bimetallic MOF (Mn/Co) constructed by active dicyandiamide linker for a promising combustion catalyst of solid propellant","authors":"Mingcheng Ge , Xian Xu , Ze Su , Ye Zhong , Binfang Yuan , Huisheng Huang , Jianguo Zhang , Zhimin Li","doi":"10.1016/j.dt.2025.04.005","DOIUrl":"10.1016/j.dt.2025.04.005","url":null,"abstract":"<div><div>Combustion catalyst is a key modifier for the performance of composite solid propellant. To exploit high-efficiency combustion catalyst, a fascinating bimetallic metal-organic framework [MnCo(EIM)<sub>2</sub>(DCA)<sub>2</sub>]<sub><em>n</em></sub> (1) was constructed by an active dicyandiamide (DCA) linker, Mn<sup>2+</sup>, Co<sup>2+</sup> centers, and an 1-ethylimidazole (EIM) ligand. 1 possesses good thermal stability (<em>T</em><sub>p</sub> = 205 °C), high energy density (<em>E</em><sub>g</sub> = 24.34 kJ/g, <em>E</em><sub>v</sub> = 35.93 kJ/cm<sup>3</sup>), and insensitivity to impact and frictional stimulus. The catalytic effects of 1 contrasted to monometallic coordination compounds Mn(EIM)<sub>4</sub>(DCA)<sub>2</sub> (2) and Co(EIM)<sub>4</sub>(DCA)<sub>2</sub> (3) on the thermal decomposition of AP/RDX composite were investigated by a DSC method. The decomposition peak temperatures of AP and RDX of the composite decreased to 335.8 °C and 206.4 °C, respectively, and the corresponding activation energy decreased by 27.3% and 43.6%, respectively, which are better than the performances of monometallic complexes 2 and 3. The gas products in the whole thermal decomposition stage of the sample were measured by TG-MS and TG-IR, and the catalytic mechanism of 1 to AP/RDX was further analyzed. This work reveal potential application of bimetallic MOFs in the composite solid propellants.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"50 ","pages":"Pages 203-212"},"PeriodicalIF":5.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An isogeometric approach for vibration characteristics analysis of functionally graded triply periodic minimal sandwich curved-doubly shell integrated with magneto-electro surface layers subjected to low-velocity impact load 基于等几何方法的功能梯度三周期最小夹层弯曲双壳在低速冲击载荷作用下的振动特性分析

IF 5.9

Defence Technology(防务技术) Pub Date : 2025-08-01 DOI: 10.1016/j.dt.2025.04.010

Le Hoai , Pham Hoang Tu , Van Ke Tran , Nguyen Thi Hue

{"title":"An isogeometric approach for vibration characteristics analysis of functionally graded triply periodic minimal sandwich curved-doubly shell integrated with magneto-electro surface layers subjected to low-velocity impact load","authors":"Le Hoai , Pham Hoang Tu , Van Ke Tran , Nguyen Thi Hue","doi":"10.1016/j.dt.2025.04.010","DOIUrl":"10.1016/j.dt.2025.04.010","url":null,"abstract":"<div><div>In this paper, the isogeometric analysis (IGA) method is employed to analyze the oscillation characteristics of functionally graded triply periodic minimal surface (FG-TPMS) curved-doubly shells integrated with magneto-electric surface layers (referred to as \"FG-TPMS-MEE curved-doubly shells\") subjected to low-velocity impact loads. This study presents low-velocity impact load model based on a single spring-mass (S-M) approach. The FG-TPMS-MEE curved-doubly shells are covered with two magneto-electric surface layers, while the core layer consists of three types: I-graph and Wrapped Package-graph (IWP), Gyroid (G), and Primitive (P), with various graded functions. These types are notable for their exceptional stiffness-to-weight ratios, enabling a wide range of potential applications. The Maxwell equations and electromagnetic boundary conditions are applied to compute the change in electric potentials and magnetic potentials. The equilibrium equations of the shell are derived from a refined higher-order shear deformation theory (HSDT), and the transient responses of the FG-TPMS-MEE curved-doubly shells are subsequently determined using Newmark's direct integration method. These results have applications in structural vibration control and the analysis of structures subjected to impact or explosive loads. Furthermore, this study provides a theoretical prediction of the low-velocity impact load and magneto-electric-elastic effects on the free vibration and transient response of FG-TPMS-MEE curved-doubly shells.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"50 ","pages":"Pages 101-125"},"PeriodicalIF":5.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Localization and tracking of multiple quadrotors with collision avoidance: Theory and experiment 多旋翼飞行器避碰定位与跟踪：理论与实验

IF 5.9

Defence Technology(防务技术) Pub Date : 2025-08-01 DOI: 10.1016/j.dt.2025.04.002

Guang Yang , Juntong Qi , Mingming Wang , Yan Peng , Chong Wu , Yuan Ping , Hailong Huang

{"title":"Localization and tracking of multiple quadrotors with collision avoidance: Theory and experiment","authors":"Guang Yang , Juntong Qi , Mingming Wang , Yan Peng , Chong Wu , Yuan Ping , Hailong Huang","doi":"10.1016/j.dt.2025.04.002","DOIUrl":"10.1016/j.dt.2025.04.002","url":null,"abstract":"<div><div>Multiple quadrotors target encirclement is widely used in the intelligent field, as it can effectively monitor and control target behavior. However, it faces the danger of collision, as well as difficulties in localization and tracking. Therefore, we propose a complete target encirclement method. Firstly, based on Hooke's law, a collision avoidance controller is designed to maintain a safe flying distance among quadrotors. Then, based on the consensus theory, a formation tracking controller is designed to meet the requirements of formation transformation and encirclement tasks, and a stability proof based on Lyapunov was provided. Besides, the target detection is designed based on YOLOv5s, and the target location model is constructed based on the principle of pinhole projection and triangle similarity. Finally, we conducted experiments on the built platform, with 3 reconnaissance quadrotors detecting and localization 3 target vehicles and 7 hunter quadrotors tracking them. The results show that the minimum average error for localization targets with reconnaissance quadrotors can reach 0.1354 m, while the minimum average error for tracking with hunter quadrotors is only 0.2960 m. No quadrotors collision occurred in the whole formation transformation and tracking experiment. In addition, compared with the advanced methods, the proposed method has better performance.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"50 ","pages":"Pages 338-350"},"PeriodicalIF":5.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Screening of metal additives in ABS polymer fuel for enhanced performance in hybrid rocket motors: A computational analysis using CEA 混合动力火箭发动机ABS聚合物燃料中金属添加剂的筛选：CEA计算分析

IF 5.9

Defence Technology(防务技术) Pub Date : 2025-08-01 DOI: 10.1016/j.dt.2025.03.014

Gail Ndlovu , Bilainu Oboirien , Patrick Ndungu

{"title":"Screening of metal additives in ABS polymer fuel for enhanced performance in hybrid rocket motors: A computational analysis using CEA","authors":"Gail Ndlovu , Bilainu Oboirien , Patrick Ndungu","doi":"10.1016/j.dt.2025.03.014","DOIUrl":"10.1016/j.dt.2025.03.014","url":null,"abstract":"<div><div>This study investigates the potential of metal additives in acrylonitrile butadiene styrene (ABS) polymer fuel to enhance hybrid rocket motor (HRM) performance through computational analysis, Chemical Equilibrium with Applications (CEA), software. ABS was selected as the base fuel due to its thermoplastic nature, which allows for the creation of complex fuel geometries through 3D printing, offering significant flexibility in fuel design. Hybrid rockets, which combine a solid fuel with a liquid oxidiser, offer advantages in terms of operational simplicity and safety. However, conventional polymer fuels often exhibit low regression rates and suboptimal combustion efficiencies. In this research, we evaluated a range of metal additives—aluminium (Al), boron (B), nickel (Ni), copper (Cu), and iron (Fe)—at chamber pressures ranging from 1 to 30 bar and oxidiser-to-fuel (O/F) ratios between 1.1 and 12, resulting in 1800 unique test conditions. The main performance parameters used to assess each formulation were characteristic velocity (<em>C</em>∗) and adiabatic flame temperature. The results revealed that each test produced a different optimum O/F ratio, with most ratios falling between 4 and 6. The highest performance was achieved at a chamber pressure of 30 bar across all formulations. Among the additives, Al and B demonstrated significant potential for improved combustion performance with increasing metal loadings. In contrast, Fe, Cu, and Ni reached optimal performance at a minimum loading of 1%. Future work includes investigating B-Al metal composites as additives into the ABS base polymer fuel, and doing experimental validation tests where the metallised ABS polymer fuel is 3D printed.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"50 ","pages":"Pages 176-184"},"PeriodicalIF":5.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The noise analysis and multi-physical field coupling study of high-precision SERF atomic gyroscopes 高精度SERF原子陀螺仪的噪声分析及多物理场耦合研究

IF 5.9

Defence Technology(防务技术) Pub Date : 2025-08-01 DOI: 10.1016/j.dt.2025.04.015

Jiaxin Liu , Xusheng Lei , Yu Yuan , Yizhe Zhou , Haoying Pang , Zhihong Wu

{"title":"The noise analysis and multi-physical field coupling study of high-precision SERF atomic gyroscopes","authors":"Jiaxin Liu , Xusheng Lei , Yu Yuan , Yizhe Zhou , Haoying Pang , Zhihong Wu","doi":"10.1016/j.dt.2025.04.015","DOIUrl":"10.1016/j.dt.2025.04.015","url":null,"abstract":"<div><div>The spin-exchange relaxation-free atomic gyroscope, with its exceptionally high theoretical precision, demonstrates immense potential to become the next-generation strategic-grade gyroscope. However, due to technological noise, there is still a significant gap between its actual precision and theoretical precision. This study identifies the key factor limiting the precision of the SERF gyroscope as coupling noise. By optimizing the detection loop structure, a distinction between the dual-axis signals' response to optical and magnetic fields was achieved—where the optical errors responded similarly, while the response to magnetic noise was opposite. Based on the differences in the optical-magnetic response of the dual-axis signals, empirical mode decomposition was used to decompose the dual-axis gyroscope signals into multiple intrinsic mode functions, and Allan deviation analysis was applied to analyze the noise characteristics of the intrinsic mode functions over various periods. This study successfully reveals that optical errors caused by thermal-optical coupling and long-period magnetic noise induced by thermal-magnetic coupling are the dominant factors limiting the long-term stability of the SERF gyroscope. Based on these analyses, the study concludes that to achieve strategic-grade precision for the SERF gyroscope, it is essential to effectively address the noise issues caused by multi-physical field couplings.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"50 ","pages":"Pages 213-224"},"PeriodicalIF":5.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Calibration of empirical penetration models using large deformation explicit finite element simulations of rapid penetration in clay 大变形显式有限元模拟快速侵彻粘土的经验模型校正

IF 5.9

Defence Technology(防务技术) Pub Date : 2025-08-01 DOI: 10.1016/j.dt.2025.03.021

Boules N. Morkos , Rachel White , Mehdi Omidvar , Magued Iskander

{"title":"Calibration of empirical penetration models using large deformation explicit finite element simulations of rapid penetration in clay","authors":"Boules N. Morkos , Rachel White , Mehdi Omidvar , Magued Iskander","doi":"10.1016/j.dt.2025.03.021","DOIUrl":"10.1016/j.dt.2025.03.021","url":null,"abstract":"<div><div>Numerous former military sites worldwide require environmental cleanup from buried unexploded ordnance (UxO) that pose hazards such as leaching toxic chemicals and explosion risks. However, selecting the appropriate mitigation technology relies on prior knowledge of UxO depth of burial (DoB) at specific sites. This study utilizes numerical simulations, employing large deformation explicit finite element (LDEFE) analysis and the Coupled Eulerian-Lagrangian (CEL) approach, to model the penetration of ordnances into clay targets. A modified Tresca constitutive model is implemented in ABAQUS software to capture key features of clay behavior under high strain rate (HSR) loading. The role of various parameters on DoB is investigated, including undrained shear strength, stiffness, and density of the soil. The findings highlight the paramount importance of undrained shear strength in clayey soil penetrability, in addition to the role of soil stiffness, and density. The simulations were employed to calibrate model parameters for Young's empirical penetration model, as well as the Poncelet phenomenological penetration model, demonstrating the efficacy of the numerical simulations in extrapolating its findings within the relevant parameter space. In particular, the calibrated parameters of Young's and Poncelet's models can be identified as a direct function of the various discussed soil properties, which was previously unavailable.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"50 ","pages":"Pages 20-35"},"PeriodicalIF":5.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144810021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0