| 民用飞机橡胶密封件老化性能研究与寿命评估 |
| Research on Aging Performance and Life Evaluation of Rubber Seals for Civil Aircraft |
| 投稿时间：2025-02-12 修订日期：2025-02-13 |
| DOI：10.12136/j.issn.1000-890X.2025.12.0891 |
| 中文关键词: 民用飞机 橡胶密封件 老化性能 寿命评估 |
| 英文关键词: civil aircraft rubber seal aging performance life evaluation |
| 基金项目: |
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| 中文摘要: |
| 介绍民用飞机橡胶密封件的老化性能研究与寿命评估。结果表明：温度场对橡胶材料的力学性能退化具有显著的调控作用，随着老化温度的升高，橡胶材料的弹性恢复能力呈现加速衰减趋势，同时压缩永久变形显著增大；热降解反应导致橡胶材料的拉伸强度和拉断伸长率呈现非线性特征，撕裂强度则表现出对温度显著的依赖性；基于橡胶材料的力学性能临界失效构建的时间-温度的线性回归模型预测，在23 ℃基准温度下橡胶密封件的理论使用寿命为48年，在40 ℃典型温度下橡胶密封件的理论使用寿命缩短至12年；基于民用飞机实际运营环境存在－55～＋70 ℃的宽域温度波动而进行5次交变温度循环试验后，橡胶密封件的结构和性质均未发生明显变化。 |
| 英文摘要: |
| Research on the aging performance and life evaluation of the rubber seals for civil aircraft was introduced.The results showed that the temperature field had a significant regulatory effect on the mechanical property degradation of the rubber material.With the increase of the aging temperature，the elastic recovery abilities of the rubber material showed an accelerated decay trend，and the compression set significantly increased.The thermal degradation reaction caused the tensile strength and tensile elongation at break of the rubber material to exhibit the non-linear characteristics，while the tear strength exhibited the significant temperature dependence.The time-temperature linear regression model based on the critical failure of mechanical properties of rubber material predicted that the theoretical service life of the rubber seal was 48 years under the reference temperature of 23 ℃，and at the typical temperature of 40 ℃，the theoretical service life of the rubber seal was shortened to 12 years.After five alternating temperature cycle tests based on the wide range temperature fluctuation of －55～＋70 ℃ in the actual operating environment of civil aircraft，the structure and properties of rubber seals did not show significant changes. |
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