The Effect of Sub-Zero Temperature and High Strain Rate on Mechanical Strength of 9/7 ‘Oak’ Gun Propellant
The article presents the results of compressive strength testing of samples made from 9/7 ‘Oak’ (”Dąb” in Polish) gun propellant under various mechanical and thermal load conditions. The strength tests were conducted in accordance with the split-Hopkinson pressure bar (SHPB) method. The findings ind...
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| Format: | Article |
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Military University of Technology, Warsaw
2024-12-01
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| Series: | Problemy Mechatroniki |
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| Online Access: | http://promechjournal.pl/gicid/01.3001.0054.9125 |
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| author | Patryk MODRZEJEWSKI (patryk.modrzejewski@wat.edu.pl) Jacek JANISZEWSKI (jacek.janiszewski@wat.edu.pl) |
| author_facet | Patryk MODRZEJEWSKI (patryk.modrzejewski@wat.edu.pl) Jacek JANISZEWSKI (jacek.janiszewski@wat.edu.pl) |
| author_sort | Patryk MODRZEJEWSKI (patryk.modrzejewski@wat.edu.pl) |
| collection | DOAJ |
| description | The article presents the results of compressive strength testing of samples made from 9/7 ‘Oak’ (”Dąb” in Polish) gun propellant under various mechanical and thermal load conditions. The strength tests were conducted in accordance with the split-Hopkinson pressure bar (SHPB) method. The findings indicate that the mechanical behaviour of the tested gun propellant resembles that of some thermoplastic polymers. As the strain rate increases, 9/7 propellant becomes stiffer, and its compressive strength increases, but it maintains good plastic properties, i.e., material samples do not crack under dynamic load. This demonstrates, on one hand, the high sensitivity of the gun propellant to strain, and on the other, its strong resistance to brittle fracture under shock loading conditions. However, it was found that the combined effect of strain rate and lowered temperature (-50C) leads to increased brittleness of the propellant and fracture of the samples. |
| format | Article |
| id | doaj-art-4a4528322843452ea9d43c895d5bef62 |
| institution | DOAJ |
| issn | 2081-5891 2720-5266 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Military University of Technology, Warsaw |
| record_format | Article |
| series | Problemy Mechatroniki |
| spelling | doaj-art-4a4528322843452ea9d43c895d5bef622025-08-20T02:44:03ZengMilitary University of Technology, WarsawProblemy Mechatroniki2081-58912720-52662024-12-01154657610.5604/01.3001.0054.912501.3001.0054.9125The Effect of Sub-Zero Temperature and High Strain Rate on Mechanical Strength of 9/7 ‘Oak’ Gun PropellantPatryk MODRZEJEWSKI (patryk.modrzejewski@wat.edu.pl)0Jacek JANISZEWSKI (jacek.janiszewski@wat.edu.pl)1Military University of Technology, Faculty of Mechatronics, Armament and Aerospace, Warsaw, PolandMilitary University of Technology, Faculty of Mechatronics, Armament and Aerospace, Warsaw, PolandThe article presents the results of compressive strength testing of samples made from 9/7 ‘Oak’ (”Dąb” in Polish) gun propellant under various mechanical and thermal load conditions. The strength tests were conducted in accordance with the split-Hopkinson pressure bar (SHPB) method. The findings indicate that the mechanical behaviour of the tested gun propellant resembles that of some thermoplastic polymers. As the strain rate increases, 9/7 propellant becomes stiffer, and its compressive strength increases, but it maintains good plastic properties, i.e., material samples do not crack under dynamic load. This demonstrates, on one hand, the high sensitivity of the gun propellant to strain, and on the other, its strong resistance to brittle fracture under shock loading conditions. However, it was found that the combined effect of strain rate and lowered temperature (-50C) leads to increased brittleness of the propellant and fracture of the samples.http://promechjournal.pl/gicid/01.3001.0054.9125mechanical engineeringlow-temperature testsdynamic strength testsgun propellants |
| spellingShingle | Patryk MODRZEJEWSKI (patryk.modrzejewski@wat.edu.pl) Jacek JANISZEWSKI (jacek.janiszewski@wat.edu.pl) The Effect of Sub-Zero Temperature and High Strain Rate on Mechanical Strength of 9/7 ‘Oak’ Gun Propellant Problemy Mechatroniki mechanical engineering low-temperature tests dynamic strength tests gun propellants |
| title | The Effect of Sub-Zero Temperature and High Strain Rate on Mechanical Strength of 9/7 ‘Oak’ Gun Propellant |
| title_full | The Effect of Sub-Zero Temperature and High Strain Rate on Mechanical Strength of 9/7 ‘Oak’ Gun Propellant |
| title_fullStr | The Effect of Sub-Zero Temperature and High Strain Rate on Mechanical Strength of 9/7 ‘Oak’ Gun Propellant |
| title_full_unstemmed | The Effect of Sub-Zero Temperature and High Strain Rate on Mechanical Strength of 9/7 ‘Oak’ Gun Propellant |
| title_short | The Effect of Sub-Zero Temperature and High Strain Rate on Mechanical Strength of 9/7 ‘Oak’ Gun Propellant |
| title_sort | effect of sub zero temperature and high strain rate on mechanical strength of 9 7 oak gun propellant |
| topic | mechanical engineering low-temperature tests dynamic strength tests gun propellants |
| url | http://promechjournal.pl/gicid/01.3001.0054.9125 |
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