The self-heating effect occurs during cyclic loadings or vibrations of composite elements, which may significantly intensify their structural degradation due to a rapid temperature increase. For minimizing this influence, the air cooling can be used. In this study, the influence of air cooling on the fatigue and residual life of a cyclically loaded structure was investigated by analyzing the self-heating temperature history and using acoustic emission. A phenomenological model of self-heating of a composite structure during air cooling is presented and discussed, with identification of possible scenarios of self-heating temperature evolution. The theoretical studies were verified experimentally, and results showed that, by removing the heat generated, the durability of a structure undergoing self-heating can be increased significantly.

中文翻译：

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空冷对聚合物复合材料自热疲劳的影响

自热效应发生在复合元件的循环载荷或振动过程中，由于温度的快速升高，这可能会显着加剧其结构退化。为了尽量减少这种影响，可以使用空气冷却。在这项研究中，通过分析自热温度历史和使用声发射，研究了空气冷却对循环加载结构的疲劳和剩余寿命的影响。提出并讨论了空气冷却过程中复合结构自热的现象学模型，并确定了自热温度演变的可能情况。理论研究得到了实验验证，结果表明，通过去除产生的热量，可以显着提高结构自热的耐久性。