Magdalena Czerwińska

Military Institute of Armament Technology

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Piotr Prasuła

Military Institute of Armament Technology

Piotr Kasprzak

Military Institute of Armament Technology

R. Panowicz

Military University of Technology in Warsaw

Marcin Konarzewski

Military University of Technology in Warsaw

Kazimierz Józefiak

Warsaw University of Technology

Józef Legieć

Military Institute of Armament Technology

T. Durejko

Military University of Technology in Warsaw

AŻ

Agnieszka Żmuda-Gołębiewska

Military Institute of Armament Technology

Małgorzata Superczyńska

Warsaw University of Technology

MŁ

Magdalena Łazińska

Military University of Technology in Warsaw

Cooperative Institutions

Military Institute of Armament Technology

Military University of Technology in Warsaw

Warsaw University of Technology

Instytut Chemii i Techniki Jądrowej

Military Technical Institute

Jagiellonian University

ORCID

AGH University of Krakow

Institute of Metallurgy and Materials Science

Cape Peninsula University of Technology

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The Use of Geotechnical Methods to Determine the Strength Parameters of the Substrate in Terms of Operation and Safety of Mortar Use

Grzegorz Bartnik Kazimierz Józefiak Małgorzata Superczyńska Magdalena Czerwińska W. Krajewski

Abstract: During firing from a mortar, an important issue is the parameters of compressibility of the ground on which the mortar is placed. This affects the operation of the mortar (including safety). During the qualification tests of the mortar, the influence of different types of substrate on its strength and work during shooting should be examined. Until now in the Polish standardization documents was no clear description about the substrate parameters used for this kind of tests. Analysis of the literature also did not allow to determine the dependence of the mortars displacement in the function of the type of substrate and its geotechnical parameters. Therefore, the authors carried out analytical and experimental analysis of the use of geotechnical methods to determine the parameters of the substrate for mortar testing. The paper presents the proposed types of standardized soil and their research methods. Preliminary tests were also carried out using the prescribed measurement methods and a comparative mortar firing test. Subsequently, an analysis of the results was carried out and the possibilities of using the proposed methods of measuring the parameters of soil compressibility were determined.

10.20944/preprints202110.0361.v1

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Thermo-oxidative aging of the polyoxymethylene (POM), acrylonitrile–butadiene–styrene (ABS) and polycarbonate (PC) polymers – a comparative study

Journal of Polymer Research (2022)

Marcin Konarzewski T. Durejko Magdalena Łazińska Magdalena Czerwińska Piotr Prasuła

Polyoxymethylene

Polycarbonate

Acrylonitrile butadiene styrene

Tensile testing

10.1007/s10965-022-03065-8

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Properties of Polyethylene Terephthalate (PET) after Thermo-Oxidative Aging

Materials (2021)

R. Panowicz Marcin Konarzewski T. Durejko Mateusz Szala Magdalena Łazińska

The influence of the thermo-oxidative aging semi-crystalline polyethylene terephthalate process on the thermal and mechanical properties was analysed in the article. For this purpose, PET was aged at 140 °C for 21, 35 and 56 days. The research showed that as a result of aging, the amount of the crystalline phase increases by about 8%, which translates into the properties of the aged material. The glass transition and melt temperature of lamellar crystals formed during first and second crystallisation increase with aging. The mechanical properties of the material were analysed in the temperature range of 25 to 75 °C. The tests were showing an increase in Young’s modulus and a decrease in elongation at the break as a result of aging. This phenomenon was particularly visible during tests at 75 °C and during the morphological observation of the fracture surface, where the fracture character of the material changes from ductile to brittle. In the case of the material aged for the longest time, the temperature has a negligible influence on the elongation at break.

Elongation

Brittleness

10.3390/ma14143833

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Citations (61)

INNOVATIVE ASPECTS OF DOG TRAINING IN HIGH EXPLOSIVES DETECTION

PROBLEMY TECHNIKI UZBROJENIA (2019)

Agnieszka Żmuda-Gołębiewska Radosław Szmigielski Magdalena Czerwińska Piotr Prasuła Wawrzyniec Pniewski

A nose of a dog is an invaluable help to humanity thanks to its excellent sensitivity and ability to recognize and distinguish odours, i.e. volatile substances emitted by a given material. In comparison with the increasingly advanced technology of electronic detection devices, it still ranks first on the “podium”. Due to its special abilities the dog is a great support in the fight against terrorism, where the early detection of explosives plays a key role in security. In the training process of a dog for the detection of explosives in Polish uniformed services genuine explosives samples are used. However, international studies have shown that this approach does not give 100% guarantee of HE detection by a dog. In addition, the use of classic HE samples in training involves a risk associated to the safety of both the operator and the dog and is burdened by law enforcement restrictions related to storage, use and transportation. An innovative solution developed during the implementation of the subject “Reference set of explosives samples for training and validation of service dogs” allows for more flexibility while handling the sample, increases the safety of use and provides a better detection of the explosive by the dog.

Explosive detection

Sample (material)

10.5604/01.3001.0013.3770

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STUDY OF THERMO-MECHANICAL PROPERTIES OF AGED HOMOGENEOUS SOLID ROCKET PROPELLANT ACCORDING TO STANAG REQUIREMENTS

PROBLEMY TECHNIKI UZBROJENIA (2018)

Magdalena Czerwińska Piotr Prasuła

Proper operation of rocket motor depends significantly on thermo-mechanical properties of propellant used. For this reason it is important that characteristics of a particular propellant versus the time and temperature pass a thorough investigation to assess its operation at different conditions. The paper illustrates investigations of ageing process influencing thermo-mechanical properties of homogeneous rocket propellant. A selected type of rocket propellant was subjected to accelerated ageing in conditions specified in AOP-48 document to establish in the next step its thermal and mechanical characteristics (between all the temperature of glass transition and decomposition). The ageing of propelling explosives causes the reduction of stabiliser content deciding about thermo-mechanical properties of propellant and for that the percentage of effective stabiliser and its loss were identified by liquid chromatography HPLC. Thermal properties were investigated by differential scanning calorimetry. Thermal analyses were carried out according to STANAG 4515. Mechanical characteristics were tested by dynamic mechanical analysis (DMA) in line with STANAG 4540.

Stabiliser

Rocket propellant

Solid-fuel rocket

Rocket (weapon)

10.5604/01.3001.0012.1325

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Zastosowanie nanomateriałów w przemyśle zbrojeniowym

Chemik (2014)

Magdalena Czerwińska

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APPLICATION OF X-RAY METHOD FOR TESTING MUNITIONS

PROBLEMY TECHNIKI UZBROJENIA (2016)

M. Nita R. Warchoł Piotr Kasprzak Magdalena Czerwińska

Some results of non-destructive tests of explosive ordnance (munitions) used by the Polish Armed Forces and performed by X-ray apparatus MU-17F-225-9 from YXLON are presented in the paper. Tests were performed in diagnostic purposes as they are significant for munitions status evaluation process. Received results decide also about the selection of final testing methodology.

Ammunition

10.5604/01.3001.0010.0538

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Properties of Rubber-Like Materials and their Blends in Wide Range of Temperatures – Experimental and Numerical Study

Acta Mechanica et Automatica (2023)

Marcin Konarzewski Michał Stankiewicz Marcin Sarzyński Marcin Wieczorek Magdalena Czerwińska

Abstract Elastomers are widely used in many industries. Their use requires thorough knowledge of their strength and stiffness parameters over a wide temperature range. However, determination of the parameters of such materials is still a challenge. Therefore, the paper presents research methodology allowing determination of the properties of rubber-like materials in a wide range of stretch and temperatures (from +50°C to −25°C) by using the example of styrene-butadiene rubber (SBR) and natural rubber (NR) elastomers. Additionally, two blends, chloroprene rubber/nitrile-butadiene rubber (CR/NBR) and NR/SBR blends, were also considered. Based on physical premises, a polynomial and Arruda–Boyce hyperelastic constitutive models parameters were determined using two different methods, namely curve-fitting and the successive response surface method.

Chloroprene

Hyperelastic material

Styrene-butadiene

Neoprene

Synthetic rubber

10.2478/ama-2023-0037

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Citations (2)

Wolframowe spieki ciężkie - właściwości, wytwarzanie i zastosowanie

Problemy Techniki Uzbrojenia (2012)

Magdalena Czerwińska

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Badania właściwości wybranego homogenicznego paliwa rakietowego przed i po przyspieszonym starzeniu

PROBLEMY TECHNIKI UZBROJENIA (2019)

Magdalena Czerwińska Agnieszka Żmuda-Gołębiewska Piotr Prasuła

W procesie przechowywania znaczący wpływ na prawidłowe zadziałanie ziarna paliwa rakietowego oraz całego silnika rakietowego mają zachodzące w nim reakcje chemiczne i procesy fizyczne, takie jak ubytek stabilizatora, migracja i parowanie nitrogliceryny, rozkład łańcuchów nitroglicerynowych i nitrocelulozowych itp. Właściwości termiczne i mechaniczne sta-łych materiałów rakietowych badano za pomocą dynamicznej analizy mechanicznej (DMA). Jest to skuteczna i bezpieczna technika, która umożliwia uzyskanie wielu informacji o badanej próbce w jednym cyklu pomiarowym. Szczególną uwagę zwrócono na wyznaczenie temperatury zeszklenia badanego paliwa rakietowego. Ponadto zastosowano różnicową kalorymetrię skaningową (DSC) i termograwimetrię (TG). Określono energię aktywacji. W obliczeniach kinetycznych zastosowano metody Kissingera i Ozawy. Średnią masę cząsteczkową nitrocelulozy i jej rozkład przed i po przyspieszonym starzeniu mierzono techniką chromatografii żelowej (GPC). Badania właściwości mechanicznych, termicznych i fizycznych paliwa rakietowego mogą pomóc w jego lepszym projektowaniu, w opracowywaniu bardziej wydajnych procesów produkcyjnych,w dostosowaniu poszczególnych etapów produkcji w celu ulepszenia właściwości pro-duktu końcowego lub nawet mogą zostać wykorzystane do przeprojektowania całego proce-su produkcji.

10.5604/01.3001.0013.1675

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