焊管2011，Vol.34Issue(12)：27-31,35,6.
HFW钢管焊缝疲劳特性与疲劳寿命预测方法研究
Research on the Fatigue Property of HFW Pipe Welded Seam and Fatigue Life Forecast Method
韩军 1高惠临 2韩新利1
作者信息
- 1. 西安石油大学,西安710065
- 2. 中国石油集团石油管工程技术研究院,西安710065
- 折叠
摘要
Abstract
The transportation pressure of oil and gas pipeline can change periodically because of restart and supply change, so the fatigue failure problems stand out exceptionally. Especially for pipeline with crack defect, when the value of stress intensity factor exceeds fatigue crack expansion threshold value under fatigue load, the crack will expand; when crack expansion exceed critical defect extreme dimension under pipeline operation pressure, the fatigue failure of pipeline will happen, this will affect useful life of pipeline. In this article, the fatigue crack expansion threshold value of X80 HFW pipe welded seam and fatigue crack propagation rate were tested by using high-frequency fatigue testing machine, combined with the failure assessment diagram (FAD) recommended in API 579 Fitness-for-service Specification and the Miner's linear cumulative damage theory, considering the effect of combined stress ratio on pipeline fatigue life, the fatigue life forecast method for two-parameter HFW pipeline was established.关键词
HFW钢管焊缝/疲劳特性/疲劳寿命预测/Miner线性累计损伤模型Key words
HFW pipe welded seam/ fatigue property/ fatigue life forecast/ Miner linear cumulative damage model分类
矿业与冶金引用本文复制引用
韩军,高惠临,韩新利..HFW钢管焊缝疲劳特性与疲劳寿命预测方法研究[J].焊管,2011,34(12):27-31,35,6.
