贯穿型缺口小冲杆试样确定高钢级管线钢断裂韧度的研究

doi:10.3901/JME.2022.12.083

机械工程学报 ›› 2022, Vol. 58 ›› Issue (12): 83-92.doi: 10.3901/JME.2022.12.083

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贯穿型缺口小冲杆试样确定高钢级管线钢断裂韧度的研究

宋明¹, 祖毅真¹, 马帅¹, 王炳英², 曹宇光¹, 蒋文春³

1. 中国石油大学(华东)储运与建筑工程学院青岛 266580;
2. 中国石油大学(华东)材料科学与工程学院青岛 266580;
3. 中国石油大学(华东)新能源学院青岛 266580

收稿日期:2021-09-18 修回日期:2022-03-02 出版日期:2022-06-20 发布日期:2022-09-14
作者简介:宋明,男,1984年出生,博士,讲师,硕士研究生导师。主要研究方向为先进能源材料与装备结构完整性技术。E-mail:songmingx@gmail.com
基金资助:
国家自然科学基金（51805543）、山东省自然科学基金（ZR2019MEE108）、油气管道及储运设施完整性评价技术研究（2016YFC0802105）和中央高校基本科研业务费专项资金（18CX05002A）资助项目

Determination of Fracture Toughness of High-grade Pipeline Steel Based on Though-thickness-notched Specimen by Small Punch Test

SONG Ming¹, ZU Yizhen¹, MA Shuai¹, WANG Bingying², CAO Yuguang¹, JIANG Wenchun³

1. College of Pipeline and Civil Engineering, China University of Petroleum(East China), Qingdao 266580;
2. College of Materials Science and Engineering, China University of Petroleum(East China), Qingdao 266580;
3. College of New Energy, China University of Petroleum(East China), Qingdao 266580

Received:2021-09-18 Revised:2022-03-02 Online:2022-06-20 Published:2022-09-14

摘要/Abstract

摘要： 小冲杆试验作为一种微损测试技术，在评估石油化工行业在役设备材料性能劣化方面具有广阔的发展潜力。提出了一种使用贯穿型预制缺口小冲杆试样评价材料断裂韧度的方法，以X80高钢级管线钢为目标材料，开展了小冲杆试验评价材料断裂韧度的研究。首先，设计一种贯穿型预制缺口试样，并进行小冲杆试验。其次，进行缺口试样的有限元模拟，结合试验数据修正模型，并确定缺口试样的最佳尺寸。最终，通过数值模拟围线积分法得到贯穿型缺口试样的回路J积分曲线，结合起裂位移确定小冲杆试验的临界断裂韧度J_{C (SP)}，同时进行标准SENB试样三点弯试验得到材料J_C值，通过引入系数k建立二者的关联关系，建立使用贯穿型预制缺口小冲杆试样获得X80高钢级管线钢断裂韧度的方法。

关键词: 小冲杆试验, 断裂韧度, 贯穿型缺口, J积分, X80管道钢

Abstract: As a miniature specimen testing technology, small punch test (SPT) has a broad development potential in evaluating the performance deterioration of equipment and materials in petrochemical industry. A method for evaluating fracture toughness of materials by SPT through notches is proposed. Taking X80 high-grade pipeline steel as the target material, the small punch test is carried out to evaluate the fracture toughness of materials. First of all, a through type prefabricated notch specimen is designed and the small punch test is carried out. Secondly, the finite element simulation of the through type prefabricated notch specimen is performed while the model was modified with the test data. And the optimal size of the notched specimen was determined. Finally the J-integral of each contour is obtained by contour integral method and the critical fracture toughness J_C(SP) of small punch test is determined by the crack initiation displacement. Meanwhile, the J_C value of material is obtained by standard SENB three-point bending test. Finally, the relationship between J_C and J_C(SP) of the high-grade pipeline steel was established by using the proposed method with the notched SPT specimen.

Key words: small punch test, fracture toughness, through-thickness notch, J-integral, X80 pipeline steel

中图分类号:

TG115

宋明, 祖毅真, 马帅, 王炳英, 曹宇光, 蒋文春. 贯穿型缺口小冲杆试样确定高钢级管线钢断裂韧度的研究[J]. 机械工程学报, 2022, 58(12): 83-92.

SONG Ming, ZU Yizhen, MA Shuai, WANG Bingying, CAO Yuguang, JIANG Wenchun. Determination of Fracture Toughness of High-grade Pipeline Steel Based on Though-thickness-notched Specimen by Small Punch Test[J]. Journal of Mechanical Engineering, 2022, 58(12): 83-92.

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贯穿型缺口小冲杆试样确定高钢级管线钢断裂韧度的研究

Determination of Fracture Toughness of High-grade Pipeline Steel Based on Though-thickness-notched Specimen by Small Punch Test

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