A reliability analysis method for predicting the service life of aircraft structures considering corrosion damage has been proposed. This method introduces corrosion damage as the initial damage into the Chaboche fatigue cumulative damage model, and uses Monte Carlo method to simulate and reconstruct the corrosion fatigue damage process of the structure, achieving reliability analysis of the corrosion fatigue life of aircraft structures. To verify the effectiveness of the proposed method, SO2 salt spray accelerated corrosion test and corrosion fatigue test were conducted on A100 steel as a case study, revealing the damage law and mechanism of A100 steel under corrosive environment and fatigue load. By establishing a Chaboche fatigue cumulative damage model for A100 steel and completing model parameter calibration, the reliability of structural corrosion fatigue life was evaluated using the proposed reliability method. This method can improve the maintainability and reliability requirements of aircraft structures in corrosive environments, providing a new approach for aircraft structure safety assessment, life monitoring, and life extension.

中文翻译：

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基于 Chaboche 模型的飞机结构腐蚀疲劳可靠性分析方法

提出了一种考虑腐蚀损伤预测飞机结构使用寿命的可靠性分析方法。该方法将腐蚀损伤作为初始损伤引入 Chaboche 疲劳累积损伤模型，并采用 Monte Carlo 方法对结构的腐蚀疲劳损伤过程进行仿真和重构，实现了飞机结构腐蚀疲劳寿命的可靠性分析。为验证所提方法的有效性，以 A100 钢为例，对 A100 钢进行了 SO2 盐雾加速腐蚀试验和腐蚀疲劳试验，揭示了 A100 钢在腐蚀环境和疲劳载荷下的损伤规律和机理。通过建立 A100 钢的 Chaboche 疲劳累积损伤模型并完成模型参数标定，使用所提出的可靠性方法评估了结构腐蚀疲劳寿命的可靠性。该方法可以提高飞机结构在腐蚀环境下的可维护性和可靠性要求，为飞机结构安全评估、寿命监测和寿命延长提供了新的途径。