{"title":"The influence of small weld cracks on the fatigue life of steel pipe for nuclear service","authors":"W.J. Love","doi":"10.1016/0369-5816(65)90028-1","DOIUrl":null,"url":null,"abstract":"<div><p>An experimental program was carried out to determine the effect of small weld cracks on the fatigue strength of steel pipe. Direct and bending load tests of both innate and artificial flaws were carried out with special hydrostatic pressurization and vibratory fatigue machines. Values of notch sensitivity of the base, weld and heat affected zone materials were found to be similar, ranging between 0.1 and 0.2. The results showed that no appreciable reduction in specimen life occurred when small (to 4% wall thickness) cracks were tested in the presence of ordinary manufacturing discontinuities such as surface roughness and weld notches.</p><p>A semi-empirical method for computing the influence of small pipe wall cracks on pipe life is suggested and compared with the test results.</p></div>","PeriodicalId":100973,"journal":{"name":"Nuclear Structural Engineering","volume":"2 2","pages":"Pages 181-202"},"PeriodicalIF":0.0000,"publicationDate":"1965-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0369-5816(65)90028-1","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuclear Structural Engineering","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0369581665900281","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
An experimental program was carried out to determine the effect of small weld cracks on the fatigue strength of steel pipe. Direct and bending load tests of both innate and artificial flaws were carried out with special hydrostatic pressurization and vibratory fatigue machines. Values of notch sensitivity of the base, weld and heat affected zone materials were found to be similar, ranging between 0.1 and 0.2. The results showed that no appreciable reduction in specimen life occurred when small (to 4% wall thickness) cracks were tested in the presence of ordinary manufacturing discontinuities such as surface roughness and weld notches.
A semi-empirical method for computing the influence of small pipe wall cracks on pipe life is suggested and compared with the test results.
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