Influence of High-altitude and Cold Environment on Performance of Non-metallic Materials for Helicopters

AI Jianbo; LAN Zhiyun; WU Jianguo; ZHANG Xiaojuan; CUI Tengfei

doi:10.7643/issn.1672-9242.2025.08.003

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Equipment Environmental Engineering ›› 2025, Vol. 22 ›› Issue (8) : 24-32. DOI: 10.7643/issn.1672-9242.2025.08.003

Special Topic—Application and Collaborative Evaluation Technology of Light Weapons in Complex Environments

Influence of High-altitude and Cold Environment on Performance of Non-metallic Materials for Helicopters

AI Jianbo¹, LAN Zhiyun², WU Jianguo¹, ZHANG Xiaojuan¹, CUI Tengfei¹

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Abstract

The work aims to study the performance changes of helicopter rubber and sealant materials in high-altitude and cold environments. By studying the environmental factors in Lhasa and Mohe areas, combined with the structural characteristics of helicopters, the effects of temperature, humidity and other factors were analyzed. The composition of low-temperature, humid and hot, and immersion spectrum blocks was determined, and a high-altitude and cold environment accelerated testing environment spectrum suitable for the internal structure of helicopters was developed. 5860 rubber and HM306 sealant were selected to conduct a one-year natural exposure test in Lhasa and Mohe respectively; An accelerated environment test was conducted for 5 cycles using an accelerated testing environment spectrum. After the experiment, the surface morphology, hardness, tensile strength, elongation at break, and T-shaped peel strength of the test specimens were tested. After natural environment exposure tests, there were no aging phenomena such as bubbling, delamination, or powdering observed in 5860 and HM306. The surface morphology remained basically unchanged, and the hardness, tensile strength, and elongation at break remained basically unchanged; After 5 cycles of accelerated environmental testing, the performance of 5860 and HM306 remained basically unchanged or slightly decreased, but the degree of decrease was not significant, and the surface morphology also remained basically unchanged. The results of natural environment testing and laboratory accelerated testing were consistent, and the prepared accelerated testing environment spectrum had good consistency with the actual environment. In conclusion, 5860 rubber and HM306 have good environmental adaptability in high-altitude and cold environments, which can meet the needs of helicopter use.

Key words

helicopter / non-metallic materials / high-altitude and cold / accelerated testing environment spectrum / corrosion / aging

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AI Jianbo, LAN Zhiyun, WU Jianguo, ZHANG Xiaojuan, CUI Tengfei. Influence of High-altitude and Cold Environment on Performance of Non-metallic Materials for Helicopters[J]. Equipment Environmental Engineering. 2025, 22(8): 24-32 https://doi.org/10.7643/issn.1672-9242.2025.08.003

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