In this paper, the results of a recent study on the environment-induced damage behavior of aluminum (Al) alloy 2024-T3, which is often a preferred choice for use in a spectrum of aircraft structural applications, are presented and discussed. Accelerated corrosion tests by way of exposure of test specimens of the alloy to an aggressive aqueous environment were carried out at ambient temperature (27°C). A numerical approach, based on the meshless peridynamic method, was developed to study the morphology of damage caused by the aqueous environment by way of pitting. To improve the numerical accuracy while concurrently reducing the solution time, an implicit finite-difference method was developed to solve the peridynamic control equation. The numerical algorithm was implemented in a Matlab program and was applied to simulate the evolution of pits resulting as a direct consequence of sustained exposure to the aqueous environment. The numerical predictions accord reasonably well with the experimental findings and results, thereby providing adequate proof that the simulation algorithm based on the meshless peridynamic method is effective at predicting both the nucleation and growth of the damage in the form of pits arising as a direct consequence of exposure to an aggressive aqueous environment.

中文翻译：

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铝合金腐蚀损伤的演变：实验和数值研究

在本文中，介绍并讨论了最近对铝（Al）合金2024-T3的环境引起的损坏行为的研究的结果，而铝2-202-T3通常是在飞机结构应用中使用的首选。在环境温度（27℃）下，通过使合金试样暴露于腐蚀性水环境中进行加速腐蚀试验。提出了一种基于无网格周向动力学方法的数值方法，通过点蚀的方法研究了水环境造成的破坏形态。为了提高数值精度，同时减少求解时间，开发了一种隐式有限差分方法来求解绕动力学控制方程。数值算法是在Matlab程序中实现的，并用于模拟由于持续暴露于水环境而直接导致的坑的演变。数值预测与实验结果和结果相当吻合，从而提供了充分的证据，表明基于无网格绕动力学方法的模拟算法可以有效地预测由裂纹直接导致的凹坑形式的损伤的形核和长大。暴露于腐蚀性水环境中。