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中文摘要：
采用有限元数值模拟手段,分析了裂尖氧化膜在不同曲率下对应力腐蚀裂纹尖端应力应变场的影响。结果表明,随着氧化膜裂尖曲率的不同,氧化膜裂尖Mises应力和基体金属的Mises应力及等效塑性应变规律不同,曲率越大处,越易发生氧化膜破裂;在裂尖正前方,基体金属和氧化膜结合面处,会产生应力突变,易产生裂纹,也是发生裂纹扩展的薄弱区。
英文摘要：
The effects of crack tip oxide film at different curvatures on stress-strain field at stess corrosion crack tip were studied by adopting finite element numerical simulation method. The results show that the rules of oxide film cracking tip Mises stress ,matrix metal Mises stress and equivalent plastic strain are different with the oxide film curvature changing. The bigger curvature is more prone to produce oxide film cracking. In the front of the crack tip, the stress mutation appears at the junction surface of base metal and oxide film. Crack appears in the junction surface, where is the weakened area of crack propagation.
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