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首页> 外文会议>CORROSION Research Topical Symposium >Impact of Pitting Corrosion on the Evolution and Distribution of Fatigue Damage in Aircraft Structures: Model Predictions versus Observations
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Impact of Pitting Corrosion on the Evolution and Distribution of Fatigue Damage in Aircraft Structures: Model Predictions versus Observations

机译：蚀腐蚀对飞机结构疲劳损伤进化和分布的影响：模型预测与观察

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The mechanism and modeling for particle induced pitting corrosion in aluminum alloys are briefly reviewed. A simplified, mechanistically based probability model for pitting corrosion and corrosion enhanced fatigue crack growth, and its application in predicting the probability of occurrence and spatial distribution of damage are summarized. The use and efficacy of the model as a predictive tool are demonstrated through comparisons with tear-down data from a Boeing 707 and two AT-38B aircraft. The onset of fatigue and multiple site damage is a natural consequence of the randomness in the chemical and microstructural characteristics of the material, and may be impacted by local variations in loading and environmental conditions and material selection. The significant impact of corrosion is shown. The value of the approach and the need for developing improved models for aircraft design and fleet management and sustainment are indicated.
机译：简要回顾了铝合金颗粒诱导的粘接蚀腐蚀的机理和建模。一种用于点腐蚀和腐蚀的简化的机械概率模型，增强了疲劳裂纹的增长，并且总结了预测损伤的发生概率和空间分布的应用。通过从波音707和两个AT-38B飞机的拆除数据的比较来证明模型作为预测工具的使用和功效。疲劳和多个位点损伤的发作是材料中的随机性的自然后果和材料的微观结构特征，并且可能受到局部含量的局部变化和环境条件和材料选择的影响。显示了腐蚀的显着影响。指出了方法的价值和开发改进模型的飞机设计和舰队管理和维持的需求。

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