Plastic Limit Analysis of Modified 9Cr-1Mo Steel Pressure Vessel Containing Volume Defect with Creep Damage Law
作者： Xianhe Du , Jie Zhang , Heng Peng , Yinghua Liu
DOI: 10.1142/S1758825117500259
关键词:
摘要: A numerical method for evaluating the plastic limit load of modified 9Cr-1Mo steel pressure vessel structures containing volume defect at 650∘C is proposed based on concept under high temperature. Firstly, creep analysis defected conducted with Liu–Murakami model to obtain damage after a prescribed service time. Secondly, obtained introduced into Ramberg–Osgood through hardness ratio characterize material deterioration during process. Thirdly, temperature classic zero curvature criterion model. The examples vessels different sizes defects are performed, and failure modes state revealed fitting formulae between dimensionless ...
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