高钢级管道环焊缝断裂韧性与裂尖拘束关系

doi:10.7623/syxb202302013

石油学报 ›› 2023, Vol. 44 ›› Issue (2): 385-393.DOI: 10.7623/syxb202302013

高钢级管道环焊缝断裂韧性与裂尖拘束关系

张宏¹, 吴锴¹, 冯庆善², 隋永莉³, 刘啸奔¹, 杨悦¹, 杨叠³, 戴联双², 王东营⁴, 王冲⁴

1. 中国石油大学(北京)油气管道输送安全国家工程研究中心/石油工程教育部重点实验室/北京城市油气输送技术重点实验室北京 102249;
2. 国家石油天然气管网集团有限公司北京 100013;
3. 中国石油天然气管道科学研究院有限公司油气管道输送安全国家工程研究中心河北廊坊 065000;
4. 国家管网集团北京管道有限公司北京 100101

收稿日期:2021-07-14 修回日期:2022-04-18 出版日期:2023-02-25 发布日期:2023-03-08
通讯作者: 张宏,男,1963年2月生,2003年获石油大学(北京)博士学位,现为中国石油大学(北京)机械与储运工程学院教授、博士生导师,主要从事油气储运设施结构强度研究。Email:hzhang@cup.edu.cn
作者简介:张宏,男,1963年2月生,2003年获石油大学(北京)博士学位,现为中国石油大学(北京)机械与储运工程学院教授、博士生导师,主要从事油气储运设施结构强度研究。Email:hzhang@cup.edu.cn
基金资助:
国家重点研发计划重点项目(2022YFC3070101)、国家石油天然气管网集团有限公司科学研究与技术开发项目(WZXGL202105)和北京市科学技术协会"青年人才托举工程"项目(BYESS2023145)资助。第一作者及

Relationship between fracture toughness and crack tip constraint of high-strength pipe girth welds

Zhang Hong¹, Wu Kai¹, Feng Qingshan², Sui Yongli³, Liu Xiaoben¹, Yang Yue¹, Yang Die³, Dai Lianshuang², Wang Dongying⁴, Wang Chong⁴

1. National Engineering Research Center for Pipeline Safety/MOE Key Laboratory of Petroleum Engineering/Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum, Beijing 102249, China;
2. China Oil and Gas Pipeline Network Corporation, Beijing 100013, China;
3. National Engineering Research Center for Pipeline Safety, China Petroleum Pipeline Research Institute Co., Ltd., Hebei Langfang 065000, China;
4. PipeChina Beijing Pipeline Company, Beijing 100101, China

Received:2021-07-14 Revised:2022-04-18 Online:2023-02-25 Published:2023-03-08

摘要/Abstract

摘要： 基于细观损伤力学理论,采用数值仿真方法建立了单边缺口拉伸与单边缺口弯曲的环焊缝裂纹扩展阻力数值仿真计算模型,针对低强、等强以及高强3种焊缝强度匹配条件,分别计算了面内、面外耦合拘束条件下以裂纹尖端张开位移为表征的环焊缝断裂韧性,比较了不同裂尖拘束参数描述断裂韧性与拘束关联的合理性。结果表明,采用应力三轴度所建立的拘束—断裂韧性关联性较差,而采用裂尖等效塑性区面积作为拘束参数能够较好描述面内、面外拘束对材料断裂韧性的影响。因此,建立了以裂尖等效塑性应变等值线围成区域面积作为拘束参数,用以表征面内、面外拘束与环焊缝断裂韧性的统一关联;进一步采用宽板拉伸试验结果与全尺寸管道环焊缝的有限元计算结果验证了建立的拘束—韧性关联的稳健性。

关键词: 高钢级, 环焊缝, 裂纹尖端张开位移, 裂尖拘束, 数值仿真

Abstract: Based on the theory of microscopic damage mechanics, a numerical simulation model of crack extension resistance of the girth welds with single edge notched tension and single edge notched bending was established using numerical simulation method. The fracture toughness of girth welds characterized by crack tip opening displacement under different in-plane and out-of-plane constraint condition was calculated based on the conditions corresponding to three types of weld strength:low strength matching, equal strength matching, and high strength matching. Furthermore, a comparison was performed on the rationality of different crack tip constraint parameters for describing the fracture toughness and constraints correlation. The results show that the correlation between constraints and fracture toughness established using the stress triaxiality is weak, while using the crack tip equivalent plastic zone area as the constraint parameter can better describe the effects of in-plane and out-of-plane constraints on the fracture toughness of the material. Therefore, a unified correlation between in-plane and out-of-plane constraints and girth weld fracture toughness was characterized using the area of the zone enclosed by the crack tip equivalent plastic strain contour as the constraint parameter; the robustness of the correlation established between constraints and ductility was further verified using the results of wide plate tensile tests and the finite element calculations of full-size pipe girth welds.

Key words: high strength, girth weld, crack tip opening displacement, crack tip constraint, numerical simulation

中图分类号:

TE973

张宏, 吴锴, 冯庆善, 隋永莉, 刘啸奔, 杨悦, 杨叠, 戴联双, 王东营, 王冲. 高钢级管道环焊缝断裂韧性与裂尖拘束关系[J]. 石油学报, 2023, 44(2): 385-393.

Zhang Hong, Wu Kai, Feng Qingshan, Sui Yongli, Liu Xiaoben, Yang Yue, Yang Die, Dai Lianshuang, Wang Dongying, Wang Chong. Relationship between fracture toughness and crack tip constraint of high-strength pipe girth welds[J]. Acta Petrolei Sinica, 2023, 44(2): 385-393.

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高钢级管道环焊缝断裂韧性与裂尖拘束关系

Relationship between fracture toughness and crack tip constraint of high-strength pipe girth welds

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