- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | LIN Pengzhen, WEI Yapeng, QIAO Yewei. Interfacial Stress and Failure Criteria of Steel Structure Coatings Under Wind-Sand Erosion[J]. Journal of Southwest Jiaotong University, 2023, 58(1): 236-243. doi: 10.3969/j.issn.0258-2724.20210189
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In order to characterize and assess the interfacial bonding strength of steel structure coatings under wind-sand erosion, expressions for calculating interfacial stresses of the steel structure coating under wind-sand erosion are established using theories of contact mechanics and interface mechanics, based on the typical sandstorm background of Northwest China. The interface crack initiation position of steel structure coating is determined by combined use of the fracture mechanics theory and finite element analysis method. The interfacial stress failure criterion considering the influence of compressive stress is established at the crack position. The results show that when the erosion angle is 30° and 60°, the maximum interfacial shear stress is located at 200 mm and 180 mm in front of the erosion point, and the maximum interfacial compressive stress is located at 100 mm and 50 mm in front of the erosion point, respectively. The interface crack in the coating initiates at the position of the maximum interfacial shear stress. In addition, the proposed interfacial stress failure criterion for coatings under wind-sand erosion is similar to the Mohr-Coulomb strength criterion. The slope depends on the erosion angle of the sand particles. When the erosion angle is 30° and 60°, the slope magnitude is −0.599 and −0.467, respectively.
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