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| Study on Aging Performance Degradation Law and Failure Mode of a Triple-Base Propellant |
| Received:January 19, 2022 Revised:January 27, 2022 |
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| DOI：10.7643/issn.1672-9242.2022.02.010 |
| KeyWord:propellant accelerated aging test degradation law failure mode berthelot equation life assessment |
| Author | Institution |
| SONG Li-qian |
School of Chemistry and Chemical Engineering, Nanjing University of Science & Technology, Nanjing , China |
| QIAN Hua |
School of Chemistry and Chemical Engineering, Nanjing University of Science & Technology, Nanjing , China;China National Quality Supervision Testing Center for Industrial Explosive Materials, Nanjing , China |
| LIU Da-bin |
School of Chemistry and Chemical Engineering, Nanjing University of Science & Technology, Nanjing , China |
| LI Yang |
School of Chemistry and Chemical Engineering, Nanjing University of Science & Technology, Nanjing , China |
| DU Qi-xuan |
School of Chemistry and Chemical Engineering, Nanjing University of Science & Technology, Nanjing , China |
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| Abstract: |
| This paper aims to obtain the performance degradation law of a triple-base propellant, determine its failure mode and estimate its storage and service life. According to the actual service environment and mode of triple-base propellant, the aging samples were obtained by Temperature-Humidity double stress accelerated aging test. Taking stabilizer content, compressive strength, combustion performance and mechanical sensitivity as monitoring indicators, the aged samples were tested to explore the change law of their performance and clarify the failure mode. Through Berthelot equation, the life prediction equation under typical failure mode was established. The degradation data of triple-base propellant were obtained by the test. Among them, the mechanical sensitivity had no obvious change. The heat of combustion decreased slightly with the prolongation of aging time, but remained at a high level. The relative content of stabilizer and maximum compressive strength decreased greatly with the extension of aging time. Through fitting and calculation of the data, the life prediction equations at 25 ℃ were obtained respectively. When evaluating the service life of triple-base propellant, a single index can not be considered unilaterally. Its application platform and evaluation criteria should be comprehensively considered. Meanwhile, the failure mode should be selected reasonably and the safe service life is assessed accurately, so as to avoid economic losses caused by premature destruction of ammunition and serious consequences caused by delayed replacement. |
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