Abstract The objective of this work is to explore the possibility of corrosion degradation modelling of thin steel plate specimens with the use of random field approach. The mechanical properties are obtained via the nonlinear Finite Element Analysis with the use of an explicit dynamic solver. The fully nonlinear material model is adopted to obtain the proper stress-strain response. Sensitivity analysis considering the main statistical descriptors of the random field is performed. The results of the analysis are validated with the available experimental data showing a good agreement for lower levels of Degree of Degradation and significant deviations for severely corroded specimens. The analysis shows that the irregularities in the corroded plate surface are one of the main reason for the mechanical properties reduction. Random field modelling revealed to be a swift and practical tool for representing the corroded surfaces in steel structures.

中文翻译：

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腐蚀薄钢板试样力学行为的随机场模拟

摘要 这项工作的目的是探索使用随机场方法对薄钢板试样进行腐蚀退化建模的可能性。机械特性是通过使用显式动态求解器的非线性有限元分析获得的。采用全非线性材料模型来获得适当的应力应变响应。执行考虑随机场的主要统计描述符的敏感性分析。分析的结果与可用的实验数据进行了验证，这些数据显示了较低水平的降解程度和严重腐蚀样品的显着偏差。分析表明，腐蚀板表面的不规则性是力学性能下降的主要原因之一。