Cohesive zone modelling of anodic dissolution stress corrosion cracking induced by corrosion product films |
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| Authors: | Cunguang Chen Wenwen Wang Zhiliang Zhang |
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| Institution: | 1. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, People’s Republic of China;2. School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, People’s Republic of China;3. Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, Norway |
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| Abstract: | Damage mechanics based on the cohesive zone model were applied to study the anodic dissolution stress corrosion cracking (SCC) in flat and U-shaped edge-notched specimens. The simulation results show that corrosion product films (CPFs) facilitate crack initiation in SCC due to the CPF-induced stress and CPF rupture. In the flat specimen, SCC susceptibility increases with the CPF thickness and CPF Young’s modulus, while it decreases with CPF fracture strength. For the U-shaped edge-notched specimen, the normalised threshold stress intensity factor KISCC/KIC decreases with the CPF thickness and notch depth. |
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| Keywords: | FEM cohesion corrosion cracking films stress corrosion cracking corrosion product films |
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