Propellants, Explosives, Pyrotechnics最新文献_第2页

Mesoscale modeling of the Shock‐to‐Detonation Transition of pressed‐HMX based on a surface regression model 基于表面回归模型的压制-HMX 从冲击到爆炸转变的中尺度建模

IF 1.7 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-08-08 DOI: 10.1002/prep.202400125

Jérôme Saunier, Ashwin Chinnayya, Elodie Kaeshammer, Maxime Reynaud, M. Genetier

{"title":"Mesoscale modeling of the Shock‐to‐Detonation Transition of pressed‐HMX based on a surface regression model","authors":"Jérôme Saunier, Ashwin Chinnayya, Elodie Kaeshammer, Maxime Reynaud, M. Genetier","doi":"10.1002/prep.202400125","DOIUrl":"https://doi.org/10.1002/prep.202400125","url":null,"abstract":"Shock‐to‐Detonation Transition (SDT) of heterogeneous high explosives results from processes occurring at the microstructural level. Thus, mesoscale modeling is expected to allow a better comprehension of the SDT. Recent experimental evidence suggested that hotspots mainly developed on the surface of the energetic crystals, which are then consumed by the propagation of a deflagration front. In the present study, mesoscale simulations of the SDT of pressed HMX were performed. The reactive model employed consisted of igniting the surface of the crystals after the shock passage, and reconstructing the burn front propagation, using a modified Youngs’ method. In this reactive model, the velocity of the deflagration front was modeled by a pressure‐dependent law, as suggested by the literature. The simulations showed that the Single Curve Initiation principle remained valid. The parameter deflagration velocity times the surface to volume ratio was found to enable the equivalence between microstructures. This approach provides a new framework to study the SDT of heterogeneous explosives, by considering how the combustion of energetic crystals participate to the shock acceleration and transition into a detonation. This paper serves as a proof of concept, applied to the pressed HMX.","PeriodicalId":20800,"journal":{"name":"Propellants, Explosives, Pyrotechnics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141926449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and characteristics of boron‐based composite micro‐units encapsulated by potassium perchlorate 高氯酸钾包裹的硼基复合微单元的制备及其特性

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-08-07 DOI: 10.1002/prep.202400122

Yang Qin, Jie Liu, Jiangbao Zeng, Jinbin Zou, Ye Song, Fengsheng Li

{"title":"Preparation and characteristics of boron‐based composite micro‐units encapsulated by potassium perchlorate","authors":"Yang Qin, Jie Liu, Jiangbao Zeng, Jinbin Zou, Ye Song, Fengsheng Li","doi":"10.1002/prep.202400122","DOIUrl":"https://doi.org/10.1002/prep.202400122","url":null,"abstract":"To improve the ignition and combustion performance of boron (B), the B@ potassium perchlorate (KP) composite micro‐units are successfully prepared by recrystallization of solvent evaporation. The morphology and structural composition show that B@KP composite micro‐units are formed by the gentle recrystallization of KP at the heterogeneous interface between B particles and solvents. It is shown by thermal analysis that the initial thermal decomposition temperature of KP is reduced by 49 °C due to the reduction of particle size. In addition, the heat of 420 J/g released by the thermal decomposition of KP is beneficial to the evaporation of the oxide boron (B2O3) film on the surface of B, which reduces the initial oxidation temperature of B by 185 °C and improves the ignition performance of B. Interestingly, the oxygen (O2) released by the thermal decomposition of KP quickly reacts with B to release heat of 3608 J/g, which improves the combustion performance of B. The optimal mass ratio of B to KP is 1: 5, which results in the ignition delay time of 641 ms, a reduction of 19 ms compared to the physical mixed sample. The ignition delay times of other samples are 724 ms, 680 ms and 650 ms respectively, and B could not be ignited successfully. In the combustion process, all samples emit a bright green flame of B combustion, and even a fierce combustion flame like a mushroom cloud appears. In a word, the B@KP composite micro‐units have great potential for application in solid propellants.","PeriodicalId":20800,"journal":{"name":"Propellants, Explosives, Pyrotechnics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improved method for prediction of detonation velocity for C−H−N−O based pure, mixed and aluminized explosives 基于 C-H-N-O 的纯炸药、混合炸药和铝化炸药爆炸速度的改进预测方法

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-08-07 DOI: 10.1002/prep.202400045

Satveer Kumar, Devinder Mehta, Manish Kumar, Surinder Kumar, Pramod Kumar Soni

{"title":"Improved method for prediction of detonation velocity for C−H−N−O based pure, mixed and aluminized explosives","authors":"Satveer Kumar, Devinder Mehta, Manish Kumar, Surinder Kumar, Pramod Kumar Soni","doi":"10.1002/prep.202400045","DOIUrl":"https://doi.org/10.1002/prep.202400045","url":null,"abstract":"An improved method is presented for the prediction of detonation velocity of C−H−NO based pure, mixed, and aluminized explosives. The new empirical relation is based on calculated values of the heat of detonation and the number of moles of gaseous detonation products. A constant of the empirical relation has been found using regression analysis of 74 data points of pure and mixed explosives as well as 22 data points of aluminized explosives. The value of the constant is found to be 1.00 with R2 value of 0.96. Proposed empirical relation has been validated by comparing predicted values of detonation velocities with measured values for TNT, HMX/RDX‐TNT‐Al and HMX‐TNT based explosives. Experimental measurement of detonation velocity has been carried out using pin‐ionization method on cylindrical explosive charges of diameter 50 mm and height 150 mm. The predicted values of detonation velocities are in good agreement with measured values with a root mean square error of 1.28 %. The validation of the new relation has also been carried by comparing calculated values of detonation velocities using present and literature methods with reported experimental values.","PeriodicalId":20800,"journal":{"name":"Propellants, Explosives, Pyrotechnics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of thermal stability for slow burning propellant based on isothermal testing: Self‐accelerating decomposition temperature (SADT) calculation and validation 基于等温测试的慢速燃烧推进剂热稳定性分析：自加速分解温度 (SADT) 计算与验证

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-08-07 DOI: 10.1002/prep.202400071

Yi‐min Luo, Yu Xia, Jun‐hong Wang, Teng Ma, Zhang‐qi Feng, Sen Xu, Xing‐liang Wu

{"title":"Analysis of thermal stability for slow burning propellant based on isothermal testing: Self‐accelerating decomposition temperature (SADT) calculation and validation","authors":"Yi‐min Luo, Yu Xia, Jun‐hong Wang, Teng Ma, Zhang‐qi Feng, Sen Xu, Xing‐liang Wu","doi":"10.1002/prep.202400071","DOIUrl":"https://doi.org/10.1002/prep.202400071","url":null,"abstract":"Burning rate suppressants (BRSs) refer to a series of additives that reduce the burning rate of propellants, crucial for achieving sustained and stable thrust. This research focuses on assessing the impact of ammonium sulfate and ammonium oxalate on thermal stability and their potential as BRSs. Due to the stronger inhibitory effect of ammonium sulfate on the AP proton transfer process, the activation energy of propellant's first decomposition can be increased from 94.71 kJ mol−1 to 129.69 kJ mol−1 at a 3 % addition level. Based on Semenov model, the self‐accelerated decomposition temperatures (TSADT) were calculated and validated through 7‐day isothermal test. Introducing ammonium sulfate and ammonium oxalate raised the TSADT from 197.31 °C to 220.90 °C and 215.06 °C, respectively, deviating less than 4 % from experimental results. Among the propellants tested, those with ammonium sulfate showed prolonged response delay times (44.43–33.60 h), lower superheating temperatures (222.8–445.5 °C), and reduced mass loss rates (33.0–71.4 %) after 7 days of isothermal storage at 220–240 °C. The consistency between thermal analysis and isothermal test underscores the significant impact of activation energy on thermal stability.","PeriodicalId":20800,"journal":{"name":"Propellants, Explosives, Pyrotechnics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rapid modulation of electrostatic sensitivity and explosive performance by X‐ray radiation 通过 X 射线辐射快速调节静电灵敏度和爆炸性能

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-08-07 DOI: 10.1002/prep.202300313

Ying Zhang, An Li, Denan Kong, Huanjing Li, Xianshuang Wang, Yuheng Shan, Yage He, Yeping Ren, Lixiang Zhong, Wei Guo, Fanzhi Yang, Yao Zhou, Min Xia, Ruibin Liu

{"title":"Rapid modulation of electrostatic sensitivity and explosive performance by X‐ray radiation","authors":"Ying Zhang, An Li, Denan Kong, Huanjing Li, Xianshuang Wang, Yuheng Shan, Yage He, Yeping Ren, Lixiang Zhong, Wei Guo, Fanzhi Yang, Yao Zhou, Min Xia, Ruibin Liu","doi":"10.1002/prep.202300313","DOIUrl":"https://doi.org/10.1002/prep.202300313","url":null,"abstract":"It is highly desirable to actively modulate the explosive performance and sensitivity of traditional explosives, such as RDX (hexahydro‐1,3,5‐trinitro‐1,3,5‐triazine), and HMX (cyclotetramethylene tetranitramine), especially to reduce their explosive power and electrostatic sensitivity. Herein, a new avenue is found to effectively modulate the explosive performance and electrostatic sensitivity by direct irradiation of high‐density X‐ray from synchrotron radiation. RDX as a kind of popular and high‐performance explosive, is chosen to demonstrate the modulated effectiveness. After X‐ray irradiation with different irradiation time, the detonation velocity (DV), detonation pressure (DP), heat of detonation (HoD), and electrostatic sensitivity of RDX are determined. Compared with the electrostatic sensitivity and explosive parameters of original high‐quality RDX, the maximum electrostatic sensitivity value is increased to 1061 mJ after irradiation, which is an enhancement ratio of 39.61 %. The lowest DV is 7.57 km/s (−14.27 %), the lowest DP is 16.23 GPa (−53.20 %), and the lowest HoD is 5.15 kJ/g (−9.65 %). These changes mainly originate from the changes in the structure and crystal structure of RDX molecules after irradiation, as evaluated by Scanning Electron Microscope (SEM), X‐ray Diffraction (XRD), and X‐ray Photoelectron Spectroscopy (XPS). The mechanism of RDX modulation by X‐ray is due to denitrification, which always accompanies lots of energy releases, thus impacting the electrostatic sensitivity and explosive power of RDX. Therefore, this study not only provides a new method for reducing electrostatic sensitivity to improve the safety of storage, transportation, and application of RDX, but also holds great potential to reduce explosive performance by non‐contact means.","PeriodicalId":20800,"journal":{"name":"Propellants, Explosives, Pyrotechnics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A stochastic constitutive model and its application to HTPB propellant 随机构成模型及其在 HTPB 推进剂中的应用

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-08-07 DOI: 10.1002/prep.202400008

Dong‐Mo Zhou, Bu‐Qing Hui, Shao‐Bin Zhao, Hang Chen, Xiang‐Yang Liu

{"title":"A stochastic constitutive model and its application to HTPB propellant","authors":"Dong‐Mo Zhou, Bu‐Qing Hui, Shao‐Bin Zhao, Hang Chen, Xiang‐Yang Liu","doi":"10.1002/prep.202400008","DOIUrl":"https://doi.org/10.1002/prep.202400008","url":null,"abstract":"To address the issue of randomness in the mechanical properties of the hydroxyl‐terminated polybutadiene (HTPB) propellant, a stochastic constitutive model (SCM) with a lognormally distributed random parameter Λ was proposed to describe their mechanical behaviors, and the structural integrity of a HTPB propellant grain was analyzed based on it. The results indicate that the stress‐strain curves predicted by the SCM have a good agreement with the experimental curves, and the experimental curves fall within a 95 % probability interval predicted by the SCM. The mechanical response of HTPB propellant grain under ignition pressurization is associated with the random parameters Λ. The maximum equivalent stress and safety factor increase approximately linearly with the increase of random parameters Λ, while the maximum equivalent strain and maximum damage coefficient decrease approximately linearly with the increase of random parameters Λ. The error in the mechanical response of the grain obtained based on the SCM and the experimental constitutive model is basically not more than 2 %, the SCM can effectively characterize the randomness in the mechanical response of propellant grain caused by the dispersion of HTPB propellant mechanical properties.","PeriodicalId":20800,"journal":{"name":"Propellants, Explosives, Pyrotechnics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mesoscale formation and energy release characteristics of PTFE/Al reactive jet 聚四氟乙烯/铝反应射流的中尺度形成和能量释放特性

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-08-07 DOI: 10.1002/prep.202300310

Yuanfeng Zheng, Hongyu Zhang, Peiliang Li, Zhijian Zheng, Huanguo Guo

{"title":"Mesoscale formation and energy release characteristics of PTFE/Al reactive jet","authors":"Yuanfeng Zheng, Hongyu Zhang, Peiliang Li, Zhijian Zheng, Huanguo Guo","doi":"10.1002/prep.202300310","DOIUrl":"https://doi.org/10.1002/prep.202300310","url":null,"abstract":"In order to investigate the mechanical formation, the mechanical‐thermo coupling mesoscale mechanism and the corresponding energy release characteristics of PTFE/Al composite material reactive jet, a mesoscale discretization model of PTFE/Al reactive liner with a mass ratio of 73.5 %/26.5 % is developed on the basis of the random delivery principle. The mesoscale numerical simulation is used to perform PTFE/Al reactive jet formation, obtaining the relative distribution characteristics of material, pressure, and temperature. The overpressure experiments for the energy release of reactive jets are conducted. The results show that there is an increasing tendency in the amount of Al particles from the jet's tip to its tail due to the velocity variance between PTFE and Al. The high temperature zones are found to be concentrated on the tip and axis of the jet, with particle deformation, collision and friction in the reactive jet accounting for the temperature rise. Moreover, the Al particle size has a significantly influence on the particle distribution and the mechanical‐thermo coupling behavior in the reactive jet, and the decrease of particle size is beneficial to the chemical reaction among the components of the reactive jet. To be more specifically, under the conditions of Al particle size of 400 μm, 600 μm and 800 μm, the overpressure peaks of reactive jet in 13 L chamber are 3.32 MPa, 2.86 MPa and 2.61 MPa, respectively. The variation of the overpressure with Al particle size obtained by experiment is consistent with the analysis of the mechanical‐thermo coupling characteristics of mesoscale numerical simulation.","PeriodicalId":20800,"journal":{"name":"Propellants, Explosives, Pyrotechnics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

3D‐DIC for mechanical characterization of composite solid propellant under uniaxial compression 用于单轴压缩下复合固体推进剂力学特性分析的 3D-DIC

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-08-02 DOI: 10.1002/prep.202400084

Rajeev Ranjan, H. Murthy

{"title":"3D‐DIC for mechanical characterization of composite solid propellant under uniaxial compression","authors":"Rajeev Ranjan, H. Murthy","doi":"10.1002/prep.202400084","DOIUrl":"https://doi.org/10.1002/prep.202400084","url":null,"abstract":"A novel experimental setup, utilizing 3D Digital Image Correlation (3D‐DIC), is employed to characterize the mechanical behaviour of composite solid propellant (CSP) under uniaxial compression at three displacement rates (1, 7, and 50 mm/min). At larger deformation, 3D‐DIC consistently shows smaller strains than nominal strain values, and this difference increases with deformation across all the displacement rates. Displacement rates significantly affect the non‐linear stress‐strain response of the CSPs. After the completion of the compression test, the specimen is unloaded, and the lengths of the unloaded specimens measured after 24 hour indicate a recovery of 90–94 % of the original length of the specimens. The recovered length increases with an increase in the displacement rate. Initially, Poisson's ratio is close to 0.5, and dilatation is zero, indicating an incompressible behaviour. However, both Poisson's ratio and dilatation increase with an increase in longitudinal strain, indicating a transition to compressible behaviour. Comparing the scanning electron microscope (SEM) micrographs of the virgin and compressive‐loaded samples, noticeable debonding is observed at the matrix‐particle interfaces.","PeriodicalId":20800,"journal":{"name":"Propellants, Explosives, Pyrotechnics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141885951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation and fabrication of reactive metamaterials for controllable energy response 模拟和制造用于可控能量响应的反应超材料

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-08-02 DOI: 10.1002/prep.202400132

Robert T. Ichiyama, Madeleine Stanisha, Noah P. Scarpelli, James L. Smith, D. Scott Stewart, Jimmie C. Oxley

引用次数: 0

Combustible cartridge case material characteristics evaluation 易燃弹壳材料特性评估

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-08-02 DOI: 10.1002/prep.202400100

Eliška Jehličková, Vojtěch Zůbek, Pavel Konečný, Karel Kubát

引用次数: 0