X70管线钢在模拟土壤介质中裂纹扩展量化模型

中国腐蚀与防护学报

2004, Vol. 24

Issue (3): 163-167

研究报告

本期目录 | 过刊浏览

X70管线钢在模拟土壤介质中裂纹扩展量化模型

李明星

西安石油学院

CRACK PROPAGATION QUANTITATIVE MODELS OF X70 PIPELINE STEEL IN THE SYNTHETIC SOIL SOLUTION

Mingxing Li

西安石油学院

全文: PDF(164 KB)

摘要: 试验研究了X70管线钢在模拟土壤介质中，循环载荷下的裂纹扩展特性和宏观规律.结果表明，裂纹扩展主要受裂尖应力强度因子幅ΔK的控制；在模拟高pH值(pH=93)土壤介质中，加载频率(01 Hz～10 Hz)对裂纹扩展速率无明显影响；在模拟近中性土壤介质中，裂纹扩展速率随加载频率的降低而升高，呈现明显的频率效应.结合裂纹扩展特性，分别建立了X70管线钢在模拟高pH值和近中性土壤介质中，加载频率为01 Hz～10 Hz的裂纹扩展量化模型.

关键词 ： X70管线钢, 模拟土壤介质, 裂纹扩展, 量化模型

Abstract：The crack propagation characteristics of X70 pipeline steel in the synthetic soil solution under cyclic loading are investigated.The macroscopical rules of the crack propagation are analyzed as well.Results indicate that the crack propagation is controlled mainly by the crack tip stress intensity factor range ΔK.The loading frequency (0.1 Hz～10 Hz) has little affect on the crack propagation rates in the synthetic high pH soil solution (pH=9.3).The crack propagation rate increases with the decrease of loading frequency (0.1 Hz～10Hz) in the synthetic nearneutral soil solution.Considering the crack ing propagation characteristics,the crack propagation quantitative models of the loading frequencyf=0.1 Hz～10 Hz in the synthetic high pH soil solution and near neutral soil solution are put forward respectively.

Key words： X70 pipeline steel synthetic soil solution crack propagation quantitative model

收稿日期: 2002-11-20

ZTFLH:

TG172.4

通讯作者: 李明星

Corresponding author: Mingxing Li

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引用本文:

李明星 . X70管线钢在模拟土壤介质中裂纹扩展量化模型[J]. 中国腐蚀与防护学报, 2004, 24(3): 163-167 .
Mingxing Li. CRACK PROPAGATION QUANTITATIVE MODELS OF X70 PIPELINE STEEL IN THE SYNTHETIC SOIL SOLUTION. J Chin Soc Corr Pro, 2004, 24(3): 163-167 .

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2004/V24/I3/163

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