基于CCUS 的CO2管道延性断裂机理及止裂控制研究进展

针对CO2输送管道运行过程中存在的延性断裂风险，从管道断裂机理和止裂控制两个方面综述了国内外研究进展，分析了不同相态、管材类型、杂质因素等初始条件对CO2管道断裂扩展规律的影响，总结分析了不同止裂控制方法的止裂原理和结构，以及不同类型止裂结构在试验和数值模拟中所体现的止裂效果。在综述基础上，归纳了当前CO2管道断裂机理及止裂控制研究方面需要深入研究的问题，并对相关研究内容进行了展望，包括裂纹裂尖处CO2热物性质与裂纹断裂扩展的耦合关系的研究、可靠的管道止裂准则的建立、适用于CO2管道的止裂结构的设计优化等，以期为CO2管道的合理设计、安全运行以及CCUS 技术的推广实施提供参考。

Research Progress on Ductile Fracture Mechanism and Crack Arrest Control of CO2 Pipeline Based on CCUS

In view of the risk of ductile fracture in the transportation of CO2pipeline, the research progress at home and abroad was reviewed from the aspects of pipeline fracture mechanism and crack arrest control, the influence of initial conditions such as different phase states, pipe types and impurity factors on fracture propagation law of CO2pipeline was analyzed，and the principles and structures of different crack arrest control methods were summarized and analyzed, as well as the effect of different types of crack arrest structures in experiments and numerical simulation. On the basis of the review, the problems that need to be further studied in the current research on fracture mechanism and crack arrest control of CO2 pipeline are summarized, and the related research contents are prospected, including studying the coupling relationship between the properties of CO2 thermal material at the crack tip and crack propagation, establishing a reliable crack arrest criterion for pipeline, and designing and optimizing the crack arrest structure suitable for CO2 pipeline, so as to provide theoretical guidance for the rational design, safe operation of CO2 pipeline and the promotion and implementation of CCUS technology.