Influence of yield-to-tensile strength ratio(Y/T) on failure assessment of defect-free and corroded X70 steel pipeline

作     者：章顺虎 赵德文 王晓南 

作者机构：State Key Laboratory of Rolling and Automation (Northeastern University) Shagang School of Iron and SteelSoochow University 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2014年第21卷第2期

页      面：460-465页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Project(N110607002)supported by the Fundamental Research Funds for the Central Universities of China Project(51074052)supported by the National Natural Science Foundation of China 

主　　题：yield-to-tensile strength ratio X70 steel pipeline strain hardening exponent burst pressure engineering tensile strength 

摘      要：The effect of yield-to-tensile strength ratio(Y/T) on failure pressure of X70 pipeline without and with corrosion defects was *** stress-strain response of materials was characterized by a power-law hardening *** formulas to estimate the strain hardening exponent n for a special Y/T were obtained by least squared regression method and the influence of Y/T on n was *** an application of n-Y/T expression,the analytical solutions of burst pressure for X70 pipeline without and with corrosion defects were also *** results indicate that the burst pressure of defect-free X70 pipe without corrosion defects is a function of the Y/T,pipe geometry t0/D0 and engineering tensile strength,and increases as Y/T or t0/D0 increases; whilst the burst pressure of corroded X70 pipe decreases with the increase of defect depths,d/*** indicate that the present analytical solutions closely match available experimental and numerical data.