ABSTRACT

This study focuses on the prediction of progressive brittle damages on corroded stiffened structures by using peridynamics. First, deformations of a stiffened structure subjected to uniform static pressure are investigated, and the peridynamics results are verified with the results from the finite element analysis. Second, progressive brittle damages on a corroded plate are predicted, and the effects of the corrosion on the crack path as well as bending strength of the plate are investigated. Next, progressive brittle damages on a stiffened structure with different corrosion types: localised and shadow corrosions, subjected to tension are predicted. The effects of different corrosion types on crack propagation and the strength of the structure are also analysed. Finally, progressive brittle damages on a stiffened structure subjected to uniform pressure are predicted.

摘要

本研究侧重于使用近场动力学预测腐蚀加筋结构的渐进脆性损伤。首先，研究了受均匀静压作用的加筋结构的变形，并用有限元分析的结果验证了近场动力学结果。其次，预测腐蚀板的渐进脆性损伤，并研究腐蚀对板的裂纹路径和弯曲强度的影响。接下来，预测了具有不同腐蚀类型的加强结构上的渐进脆性损坏：局部腐蚀和阴影腐蚀，受到拉力。还分析了不同腐蚀类型对裂纹扩展和结构强度的影响。最后，