Proceedings of the 32nd International Symposium on Ballistics最新文献_第10页

TESTING A PRECISION INITIATION COUPLER BY DETONATION INDUCED CAVITY COLLAPSE METHOD 用爆轰诱导空腔坍塌法测试精密起爆耦合器

Proceedings of the 32nd International Symposium on Ballistics Pub Date : 2022-05-09 DOI: 10.12783/ballistics22/36061

S. Harikrishnan, V. Rao, M. Ajay

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COMPARATIVE INVESTIGATIONS ON BALLISTIC BACKFACE DEFLECTIONS OF COMBAT HELMETS USING FORCE MEASUREMENT AND DIGITAL IMAGE CORRELATION 基于力测量和数字图像相关的作战头盔弹道后面偏转比较研究

Proceedings of the 32nd International Symposium on Ballistics Pub Date : 2022-05-09 DOI: 10.12783/ballistics22/36113

Steffen GroBert, M. Seidl, H. Gedon, S. Peldschus, O. Peschel

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NUMERICAL STUDY ON PROJECTILE STOPPAGE INSIDE THE GUN BARREL 火炮枪管内弹丸停弹的数值研究

Proceedings of the 32nd International Symposium on Ballistics Pub Date : 2022-05-09 DOI: 10.12783/ballistics22/36088

R. Chopde

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REVERSE LETHALITY AND TRAJECTORY MODELING FOR A FORENSIC APPLICATION 法医应用的反向致死和轨迹建模

Proceedings of the 32nd International Symposium on Ballistics Pub Date : 2022-05-09 DOI: 10.12783/ballistics22/36115

F. Coghe, E. Truyen, Tom Vancaeyzeele, J. Gallant

{"title":"REVERSE LETHALITY AND TRAJECTORY MODELING FOR A FORENSIC APPLICATION","authors":"F. Coghe, E. Truyen, Tom Vancaeyzeele, J. Gallant","doi":"10.12783/ballistics22/36115","DOIUrl":"https://doi.org/10.12783/ballistics22/36115","url":null,"abstract":"This article concerns part of the forensic analysis performed in the aftermath of the MH17 incident, when a civilian airliner was downed over the Ukraine in July, 2014. This analysis was performed in the framework of the international Joint Investigation Team (JIT) created to investigate this incident. The article describes the followed approaches to determine the likely launch area of a BUK 9M38(M1) missile assumed to be responsible for downing the MH17 aircraft, based on a reverse lethality and trajectory modeling in three distinct phases. Firstly, the likely point of detonation in reference to the aircraft fuselage of flight MH17 was determined. In a second phase, the likely orientation of the missile was determined by matching the damage pattern as seen on the reconstructed MH17 fuselage to the dynamic fragmentation pattern of the warhead of the considered missile system. Finally, using a flyout model for the missile system, the likely launch area of the missile was determined as requested by the Joint Investigations Team. Although the different steps are not new in the field of ballistics, their reverse application and the case to which these were applied makes this work unique and might serve as a basis for any future similar cases that might arise.","PeriodicalId":211716,"journal":{"name":"Proceedings of the 32nd International Symposium on Ballistics","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121918053","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 AND NUMERICAL STUDY ON EFP PENETRATING UNDERWATER DOUBLE-LAYER TARGETS efp穿透水下双层目标的实验与数值研究

Proceedings of the 32nd International Symposium on Ballistics Pub Date : 2022-05-09 DOI: 10.12783/ballistics22/36141

Y. Qi, L. Mao, C. Jiang, Rong Hu, Shiwei Lu, Baolin Wang, Wenxing Lei

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CATEGORIZING BALLISTIC PERFORATION MECHANISMS OF DUCTILE METALLIC PLATES USING DIMENSIONLESS PARAMETERS 用无量纲参数对韧性金属板的弹道穿孔机理进行分类

Proceedings of the 32nd International Symposium on Ballistics Pub Date : 2022-05-09 DOI: 10.12783/ballistics22/36169

Zherui Guo

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INVESTIGATION ON IMPACT INDUCED ENERGY RELEASE OF PYROPHORIC ALLOY FRAGMENTS USING TIME RESOLVED EMISSION SPECTROSCOPY 时间分辨发射光谱法研究高温合金碎片撞击致能量释放

Proceedings of the 32nd International Symposium on Ballistics Pub Date : 2022-05-09 DOI: 10.12783/ballistics22/36153

M. Seidl, H. Borchert, E. Ferraro, T. Vuyst, N. Faderl

{"title":"INVESTIGATION ON IMPACT INDUCED ENERGY RELEASE OF PYROPHORIC ALLOY FRAGMENTS USING TIME RESOLVED EMISSION SPECTROSCOPY","authors":"M. Seidl, H. Borchert, E. Ferraro, T. Vuyst, N. Faderl","doi":"10.12783/ballistics22/36153","DOIUrl":"https://doi.org/10.12783/ballistics22/36153","url":null,"abstract":"Technical advancement in material production open new doors in developing reactive material (RM) compounds that combine structural strength with exothermal energetic characteristics. Utilized to exchange inert materials, such as warhead shells, RM enhance the lethal effects. The warhead is initiated, its RM shrapnel accelerated and impact the secondary targets. Upon impact, an impact induced energy release (IIER) occurs in form of exothermal chemical reaction of the RM on the target material. For a repeatable and comparable results, a dedicated experimental set-up has been developed where single cylindrical RM fragments of a diameter D=5 mm and the same length L (L/D=1) represent the shrapnel. They are ballistically driven at initial velocities vi=1500 m/s, using a 7.62 mm powder gun. The RM fragments consists of Ferrocerium, a pyrophoric commercial alloy. Although, Ferrocerium is not primarily a candidate to replace warhead shells, its IIER is academically very suitable for the development of experimental measurement techniques. In order to understand the chemical reaction and quantify the IIER, two parameters are measured, the light emission and the pressure. Time integrated and time-resolved emission spectra, obtained by a Czerny-Turner spectrograph are discussed in this paper. From the investigated wavelength of the oxidation of lanthanum, a predominant compound of the Ferrocerium RM, temperature can be derived between 2300° and 3000° C. In addition, the RM fragment is launched in a closed chamber with pressure sensors and a pressure measurement is taken simultaneously with the light emission. In order to protect against RM enhanced weaponry, the effects of IIER need to be understood.","PeriodicalId":211716,"journal":{"name":"Proceedings of the 32nd International Symposium on Ballistics","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129137657","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

BARREL HEATING IN HYPERVELOCITY POWDER GUNS 超高速火药炮枪管加热

Proceedings of the 32nd International Symposium on Ballistics Pub Date : 2022-05-09 DOI: 10.12783/ballistics22/36093

J. Yagla, George A. Anderson

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THE BROWNIAN BASED APPROACH APPLIED TO A LIMITED SAMPLE SIZE FOR BALLISTIC RESISTANCE EVALUATION: TWO EXPERIMENTAL DATABASES 基于布朗的方法应用于有限样本量的弹道阻力评估:两个实验数据库

Proceedings of the 32nd International Symposium on Ballistics Pub Date : 2022-05-09 DOI: 10.12783/ballistics22/36187

B. Tahenti, F. Coghe, R. Nasri, B. Lauwens, M. Pirlot

{"title":"THE BROWNIAN BASED APPROACH APPLIED TO A LIMITED SAMPLE SIZE FOR BALLISTIC RESISTANCE EVALUATION: TWO EXPERIMENTAL DATABASES","authors":"B. Tahenti, F. Coghe, R. Nasri, B. Lauwens, M. Pirlot","doi":"10.12783/ballistics22/36187","DOIUrl":"https://doi.org/10.12783/ballistics22/36187","url":null,"abstract":"The field of penetration mechanics covers studies related to materials behavior under impact loading. Usually, the assessment of the ballistic resistance makes use of the V50, the bullet impact velocity with 50 percent probability of perforation of the tested target. However, the estimation of the entire curve of the perforation probability is frequently solicited. Recently, a stochastic model based on the Brownian motion concept has been proposed for that goal. The bullet motion within the target was represented as a stochastic differential equation using the bullet deceleration and a diffusion coefficient. In this paper, the maximum likelihood inference is developed for the estimation of the model parameters. This inference is applied to the complete database (581 observations) and a sample of 20 observations. In both cases, the perforation probability curve is consistent with the confidence intervals on the experimental estimations. The obtained results show that the likelihood inference extends the application of this approach to experimental samples with limited size. In addition, the proposed inference technic is applied to a second experimental database of ballistic impacts to validate the applicability of the proposed modelling methodology using the likelihood inference to various impact cases.","PeriodicalId":211716,"journal":{"name":"Proceedings of the 32nd International Symposium on Ballistics","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130150187","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

DEVELOPMENT OF HIGH SPEED PHOTOGRAPHY TECHNIQUE FOR UNDEX APPLICATIONS 索引应用的高速摄影技术的发展

Proceedings of the 32nd International Symposium on Ballistics Pub Date : 2022-05-09 DOI: 10.12783/ballistics22/36047

P. Church, D. Kirkpatrick, P. Ottley, Marcus Dear, R. King

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