Problemy Mechatroniki最新文献_第7页

Constructional Aspects for Safe Operation of 120 × 570 mm Ammunition 120 × 570毫米弹药安全操作的结构问题

Problemy Mechatroniki Pub Date : 2021-12-30 DOI: 10.5604/01.3001.0015.5991

Wojciech Furmanek, Jacek Kijewski

引用次数: 0

Dilatometry of Steel for the Production of 5.56 mm Calibre Rifle Barrels 5.56mm口径步枪枪管生产用钢的膨胀率测定

Problemy Mechatroniki Pub Date : 2021-12-30 DOI: 10.5604/01.3001.0015.5989

A. Debski, T. Majewski, R. Paszkowski

{"title":"Dilatometry of Steel for the Production of 5.56 mm Calibre Rifle Barrels","authors":"A. Debski, T. Majewski, R. Paszkowski","doi":"10.5604/01.3001.0015.5989","DOIUrl":"https://doi.org/10.5604/01.3001.0015.5989","url":null,"abstract":"During high rates of fire, the bore of the firearm barrel is exposed to high temperatures. This exposure induces structural changes in the barrel material, which is especially significant for the substrate of the galvanic chrome plating. The alloy steel grades used currently for firearm barrels, when exposed to heating above the ferrite stability limits, develop a phase transition with a discrete negative change in the material volume, which results in typical crazing in the bore. This effect is destructive to the galvanic chrome plating, leading to a loss of adhesion, which reduces the ballistic performance of the firearm, especially its muzzle velocity. This can be prevented by manufacturing barrels from steels having a limited range of phase transitions. The primary method for determining the presence of distinct volume changes in steel due to phase transition is dilatometry over a wide temperature range, which includes the interval within which the barrel bore is heated. This paper presents the dilatometry results for four steel grades, which included \u0000a steel grade currently used for firearm barrels, and an analysis of the effects of phase transition on the degradation of the barrel bore.\u0000\u0000","PeriodicalId":52820,"journal":{"name":"Problemy Mechatroniki","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42695953","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

G-Force Test Stand for the Evaluation of Weapon Component Strength 用于武器部件强度评估的G-Force试验台

Problemy Mechatroniki Pub Date : 2021-12-30 DOI: 10.5604/01.3001.0015.5987

Damian Gołoś, M. Jasinski, Paweł Zawada, J. Noga

{"title":"G-Force Test Stand for the Evaluation of Weapon Component Strength","authors":"Damian Gołoś, M. Jasinski, Paweł Zawada, J. Noga","doi":"10.5604/01.3001.0015.5987","DOIUrl":"https://doi.org/10.5604/01.3001.0015.5987","url":null,"abstract":"This paper discusses the design of a G-force test stand intended to examine of the effects of mechanical loads present during firing of a weapon and applied to the electronic components contained in the 155 mm calibre guided projectile. The G-force test stand is used to develop and test the effects of using high mechanical loads by decelerating a test specimen through the use of a purpose-designed fender assembly. For the purpose of testing, it is irrelevant whether a load is developed by acceleration or deceleration of the test specimen, as a test result obtained by the deceleration of a test specimen is equivalent to a test result obtained by the acceleration of a test specimen, as used in a 155 mm calibre artillery guided projectile. The G-force test stand was used to test and determine the velocities developed by the test specimens and the G-forces applied to them. The maximum velocity to which a test specimen was accelerated was approx. 72 m/s. The test stand was able to propel the test specimens to velocities an order of magnitude higher than the velocities obtained with a Kast and Masset ram. The tests were performed with rubber and copper fender assemblies. The effect of the specific fender used was demonstrated on the trend of the generated G-force. The test stand could develop G-forces in excess of 10,000 with a duration of more than 500 µs.\u0000\u0000","PeriodicalId":52820,"journal":{"name":"Problemy Mechatroniki","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48264464","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 of Automatic Weapon Vibrations when Burst Firing 自动武器爆破射击振动的实验研究

Problemy Mechatroniki Pub Date : 2021-12-30 DOI: 10.5604/01.3001.0015.5984

B. Vo, Martin Macko, Hung M. Dao

引用次数: 0

Quasi-Static and Dynamic Mechanical Properties of a Ti-6Al-4V Titanium Alloy Produced Using Unconventional Manufacturing Methods 非常规工艺制备Ti-6Al-4V钛合金的准静态和动态力学性能

Problemy Mechatroniki Pub Date : 2021-12-30 DOI: 10.5604/01.3001.0015.5990

Katarzyna J. Sarzyńska, R. Paszkowski

引用次数: 0

Methodology for Testing High-Energy Materials Under Low Temperature Conditions 低温条件下高能材料试验方法

Problemy Mechatroniki Pub Date : 2021-06-30 DOI: 10.5604/01.3001.0014.9338

Patryk Modrzejewski, J. Janiszewski

{"title":"Methodology for Testing High-Energy Materials Under Low Temperature Conditions","authors":"Patryk Modrzejewski, J. Janiszewski","doi":"10.5604/01.3001.0014.9338","DOIUrl":"https://doi.org/10.5604/01.3001.0014.9338","url":null,"abstract":"The methodology developed for testing gun propellants at low temperatures according to PN-EN ISO 604:2006 is presented in the paper. Brief characteristics are given of the materials tested and the most important static compression test conditions, such as specimen dimensions, deformation velocity and temperature range for selected propellants, i.e. JA-2 and SC. To verify the methodology developed, preliminary strength tests were performed at selected temperatures (25, 0, -25 and -50°C). Tests were carried out on specimens fabricated by shortening the propellant grain to the dimensions required by the reference standard. The results obtained confirmed the expected strength properties for both propellants (tensile strength and brittleness). Due to its chemical composition, the JA-2 propellant is a material of low brittleness even at -50°C. It does not crack completely and only its yield point increases. The results obtained for the JA-2 propellant were consistent with those published in reference literature. The SC propellant proved to be very brittle even at room temperature. At temperatures below 0°C, it fractures completely after reaching the desired deformation. The results obtained confirm that the adopted strength test conditions and the way the tests were prepared and performed enable acquisition of comparable and reliable results. It can be seen by analysing the results for the JA-2 propellant, which are consistent with the data in the available references. In contrast, the tests on the SC propellant proved the validity of strength tests on this type of material. Brittleness of propellant grains is \u0000a very undesirable phenomenon. A change in the combustion surface of low explosives caused by the process of propellant grain fracturing can adversely affect the magnitude and course of the pressure pulse, leading to failure of a cartridge chamber or gun barrel.\u0000\u0000","PeriodicalId":52820,"journal":{"name":"Problemy Mechatroniki","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46301125","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

Thermal Properties of Solids – Theoretical Basis, Research Methods and Selected Results of Proprietary Research 固体的热性质。理论基础、研究方法和专有研究的选定结果

Problemy Mechatroniki Pub Date : 2021-06-30 DOI: 10.5604/01.3001.0014.9331

J. Zmywaczyk

引用次数: 0

LOOK Container Systems for the African Market 寻找非洲市场的集装箱系统

Problemy Mechatroniki Pub Date : 2020-12-30 DOI: 10.5604/01.3001.0014.5647

Katarzyna Burnat

引用次数: 0

Study on Transformer JED Cap Actuation Systems in the Field of Very Strong Electromagnetic Disturbances 变压器极强电磁干扰下JED帽驱动系统的研究

Problemy Mechatroniki Pub Date : 2020-12-30 DOI: 10.5604/01.3001.0014.5643

A. Faryński, Tomasz Brodniewicz, J. Dębiński, Łukasz Słonkiewicz, Radosław Szymański, Zbigniew Ziółkowski

{"title":"Study on Transformer JED Cap Actuation Systems in the Field of Very Strong Electromagnetic Disturbances","authors":"A. Faryński, Tomasz Brodniewicz, J. Dębiński, Łukasz Słonkiewicz, Radosław Szymański, Zbigniew Ziółkowski","doi":"10.5604/01.3001.0014.5643","DOIUrl":"https://doi.org/10.5604/01.3001.0014.5643","url":null,"abstract":"This work presents the results of research on the influence of strong external electromagnetic fields on the operation of JED spark caps activated by transformer systems. The tests were carried out in order to determine the conditions of safe use of JED caps installed in control systems of generators producing electric current pulses using the principle of an explosive magnetic field cumulation [1]. For this purpose, the measurements of the voltages induced in the transformer JED spark cap actuation system were performed using sinusoidal external current with an amplitude of 10 kA for a period of 15 microseconds. This current flowed at a distance from d = 10 mm to d = 40 mm from the axis of the ferrite cores of the applied transformers: a closed core with an outer diameter of 20 mm, an inner diameter of 10 mm and a height of 10 mm and an open core with \u0000a diameter of 6 mm and a length of 25 mm. The transformers used in Air Force Institute of Technology (AFIT) were placed alternately parallel and perpendicular to the axis of the current conductor. In the case of a transformer with a cylindrical open core perpendicular to the current axis, the induced voltages significantly exceeded the values at which the caps were activated (about 2 kV) and became lower than these values at \u0000d of about 40 mm. Toroidal closed cores provided induced voltages of up to 200 V (10 times lower) for all configurations tested. The measurements were performed using a system and methods developed at AFIT.\u0000\u0000","PeriodicalId":52820,"journal":{"name":"Problemy Mechatroniki","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45776186","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

Preliminary Comparative Investigations on Ballistic Properties of Intermediate Cartridges 中间弹药筒弹道特性的初步比较研究

Problemy Mechatroniki Pub Date : 2020-12-30 DOI: 10.5604/01.3001.0014.5641

D. Goździk, B. Fikus, Jacek Kijewski

引用次数: 2