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| Simulation and Experimental Research on the Effect of Temperature and Humidity Stress on Temperature Field of Metal Bridge Belt of Pyrotechnic Product |
| Received:January 25, 2022 Revised:February 10, 2022 |
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| DOI：10.7643/issn.1672-9242.2022.02.004 |
| KeyWord:pyrotechnics energy conversion element temperature and humidity test infrared heat wave test simulation calculation |
| Author | Institution |
| ZHANG Chen-he |
Science and Technology on Applied Physical Chemistry Laboratory, Shaanxi Applied Physics and Chemistry Research Institute, Xi’an , China |
| ZHANG Rui |
Science and Technology on Applied Physical Chemistry Laboratory, Shaanxi Applied Physics and Chemistry Research Institute, Xi’an , China |
| FU Dong-xiao |
Science and Technology on Applied Physical Chemistry Laboratory, Shaanxi Applied Physics and Chemistry Research Institute, Xi’an , China |
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| Abstract: |
| This paper is to study the temperature and humidity stress expansion of the metal bridge belt surface scratches and other defects used in pyrotechnic energy conversion elements and its influence on the function of the pyrotechnics. The influence of temperature and humidity stress scratch size and its influence on the temperature field in the bridge area of the energy conversion element are studied by designing temperature and humidity double stress 80 ℃/95% test using temperature and humidity test and using the topographic analysis and infrared thermal wave experiments combined with simulation calculation. Under the action of temperature and humidity stress, the non-scratched samples on the surface of the metal bridge belt did not have obvious defects within the test time of 180 days, and the temperature field distribution and temperature rise curve were also consistent with those before the test; the width × length of the sample with scratches on the surface extends from 0.015×0.01mm before the test to 0.020×0.015mm after the test, and the maximum temperature value of the bridge area rises from 187.5 ℃ before the test to 237 ℃ after the test; at the same time, the trend of infrared test results and simulation calculation results is consistent. The temperature and humidity stress will accelerate the expansion of scratches on the surface of the bridge belt, and generate temperature accumulation in the heat collecting area in the center of the bridge area, which affects the ignition time and ignition reliability. |
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