管道大范围屈服断裂评估的研究现状与进展  

RESEARCH STATUS AND PROGRESS IN FRACTURE ASSESSMENT OF PIPELINE UNDER THE CONDITION OF LARGE-SCALE YIELDING

作　　者：韩克江[1] 帅健[1] 王俊强[1] 霍春勇[2] 

机构地区：[1]中国石油大学(北京)机械与储运工程学院,北京102249 [2]中国石油天然气集团公司石油管工程技术研究院,西安710065

出　　处：《力学进展》2012年第1期29-40,共12页Advances in Mechanics

基　　金：高等学校博士学科点专项科研基金项目(20100007110006)资助~~

摘　　要：高强度、高韧性管材的大量应用,提出管道大范围屈服断裂问题.针对现有的断裂力学方法应用于管道大范围屈服断裂评估的局限性,分别从双参数断裂力学、基于约束校正的断裂韧性测试、基于应变的断裂评估和基于应变的失效评估图4个方面详细地介绍了管道大范围屈服断裂评估的研究现状.指出目前基于约束校正的管道断裂韧性测试的主要方法是SENT试件方法和表观断裂韧性方法,评述了基于SENT试件约束校正的断裂评估研究现状及存在的问题.阐述了基于应变断裂评估的基本原理,并从驱动力方程和CTOD失效准则两方面介绍了基于应变的断裂评估方法的研究工作成果.最后提出了需要进一步研究的问题.With the application of high-strength and high-toughness pipeline steel, relevant fracture assessment is needed for pipeline under large-scale yielding condition. This article summarizes limitations that govern the conventional fracture mechanics when applied to the fracture assessment of pipeline under the condition of large-scale yielding. Here, progresses in pipeline fracture assessment under the condition of large-scale yielding are presented in detailed in four main aspects： two-parameter fracture mechanics, constraint-corrected fracture toughness test, strain-based fracture assessment, and strain-based failure assessment diagram. First of all, two methods for constraint-corrected fracture toughness test are discussed, which is SENT specimen and apparent fracture toughness method. The research status and existing problem are reviewed for constraint-corrected fracture toughness test based on SENT specimen. The basic principles of strain-based fracture assessment are presented. The strain-based driving force equation and the CTOD failure criteria are introduced in the method of strain-based fracture assessment. Finally, an overview is given for the strain-based J-integral estimation and strain-based failure assessment diagram. Finally, key topics for further studies are pointed out.

关 键 词：大范围屈服 管道 断裂评估 基于应变 失效准则 

分 类 号：O344.1[理学—固体力学]