[1]孙 宏,栾 涛,宗秋丽,等.高钢级管线钢的延性断裂： CVN和DWTT动态冲击试样应力状态和能量的研究[J].焊管,2020,43(10):56-60,64.[doi:10.19291/j.cnki.1001-3938.2020.10.010]
　Translated by SUN Hong,LUAN Tao,ZONG Qiuli,et al.Ductile Fracture of Advanced Pipeline Steels： Study of Stress States and Energies in Dynamic Impact Specimens-CVN and DWTT[J].,2020,43(10):56-60,64.[doi:10.19291/j.cnki.1001-3938.2020.10.010]
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高钢级管线钢的延性断裂： CVN和DWTT动态
冲击试样应力状态和能量的研究()
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
43
期数:
2020年第10期
页码:
56-60,64
栏目:
国外焊管
出版日期:
2020-10-28

文章信息/Info

Title:
Ductile Fracture of Advanced Pipeline Steels： Study of Stress States and
Energies in Dynamic Impact Specimens-CVN and DWTT
文章编号:
10.19291/j.cnki.1001-3938.2020.10.010
作者:
孙 宏1; 栾 涛2; 宗秋丽1; 郑青昊1 编译
1. 渤海石油装备华油钢管公司， 河北 青县  062658；
2. 曹妃甸新天液化天然气有限公司， 河北 唐山 063000
Author(s):
Translated by SUN Hong1;  LUAN Tao2;  ZONG Qiuli1;  ZHENG Qinghao1
1. North China Petroleum Steel Pipe Co., Ltd., Qingxian 062658, Hebei, China；
2. Caofeidian Suntien Liquefied Natural Gas Co., Ltd., Tangshan 063000， Hebei， China
关键词:
输气管道; 止裂; 高钢级钢; 损伤模型; 能量评定
Keywords:
gas pipelines;  crack arrest;  high-grade steels;  damage models;  energy assessment
分类号:
TG115.57
DOI:
10.19291/j.cnki.1001-3938.2020.10.010
文献标志码:
A
摘要:
针对高强韧钢的止裂性能，讨论了可用的管道止裂预测技术的现象学基础和局限性，以及在更大塑性变形时如何修订和修正结构钢的韧性，以便更好地理解在这种情况下钢的延性断裂过程。通过进行GTN损伤模型和扩展有限元（XFEM）模型的数值分析，包括参数的校准和灵敏度分析，对采用三点弯曲加载方式的X80钢夏比冲击试样及DWTT试样进行了模拟。结果表明：两种模型在应力状态和能量方面的结果都很接近，说明两种方法都可以考虑用作所需分析的比对。GTN模型更具现象学性，而XFEM模型被证明更简单、更实用。此外，应力场和能量可以针对所研究的几何形状进行量化，并且此类分析表明了夏比和DWTT试样表征描述稳态延性断裂扩展和止裂所需能量的可能性和局限性。结果支持进一步研究相关管道完整性评定。
Abstract:
Aiming at the crack arrest properties of high strength and high toughness steels, the phenomenological basis and limitations of the available techniques to predict crack arrest in gas pipelines and how the increase in toughness of structural steels demands revisions and corrections to take larger amounts of plasticity into account are discussed in order to better understand the ductile fracture process of steels under such conditions. Through the numerical analysis of GTN damage model and extended finite element model(XFEM), including parameter calibration and sensitivity analysis, the charpy impact specimen and DWTT specimen of X80 steel under three-point bending loading were simulated. The results showed that results for both models in terms of stress states and energies were close, indicating that both methodologies can be considered comparable for the desired analyses. GTN is more phenomenological, while XFEM proved to be simpler and more pragmatic. Besides that, stress fields and energies could be quantified for the studied geometries and such analyses indicated the potential and limitations of Charpy and DWTT specimens to characterize the energies required to describe steady state ductile crack propagation and crack arrestability. Results support further developments related to pipeline integrity assessments.

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备注/Memo

备注/Memo:

收稿日期：2020-01-17

作者简介：孙 宏（1974—），男，高级工程师，工程硕士，现主要从事石油输送钢管材料与试验技术工作。

更新日期/Last Update: 2020-12-07