Constraint-corrected J (CTOD) resistance curves for strain-based design of pipelines

基于应变的管道设计的约束校正 J (CTOD) 阻力曲线

• 批准号: 405856-2010
• 负责人: Zhou, Wenxing
• 金额: $ 3.22万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=529976
• 关键词: Constraint; corrected; CTOD; resistance; curves

The strain-based methodology is widely considered as the only viable option for designing pipelines subjected to large plastic deformations, e.g. pipelines subjected to frost heave- and thaw settlement-induced ground movements. The tensile strain capacity of the pipeline girth weld is of critical importance to the strain-based design of pipelines because it is one of the governing factors for the selection of the pipe and weld materials as well as the qualification of the welding process. To accurately evaluate the tensile strain capacity of the pipeline girth weld, which in general contains imperfections introduced by the welding process, a wide-plate test or material fracture toughness is needed for a direct or indirect assessment. The objective of the proposed project is to develop constraint-corrected fracture toughness resistance curves for medium- to high-strength pipeline steels and pipeline girth welds, and an analytical procedure to predict the tensile strain capacity of the wide plate. The research will be carried out for a period of three years with the cash and in-kind supports from TransCanada. One postdoctoral fellow (PDF) and one PhD student will be trained in the project.

基于应变的方法被广泛认为是设计遭受较大塑性变形的管道的唯一可行选择，例如受到霜冻和融化沉降引起的地面运动的管道。 管道周长焊缝的拉伸应变能力对于基于应变的管道设计至关重要，因为它是选择管道和焊接材料的管理因素之一，以及焊接过程的资格。 为了准确评估管道周长焊缝的拉伸应变能力，通常包含焊接过程引入的缺陷，需要进行直接或间接评估的宽板测试或材料断裂韧性。 拟议项目的目的是为中至高强度管道钢和管道周围焊缝开发约束校正的断裂韧性曲线，以及一种分析程序，以预测宽板的拉伸应变能力。 这项研究将通过TransCanada的现金和实物支持进行三年的时间。 一名博士后研究员（PDF）和一名博士生将在该项目中接受培训。