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18:24 Sep 23, 2018 |
English to Polish translations [PRO] Tech/Engineering - Engineering (general) / Rurociągi | |||||||
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| Selected response from: Frank Szmulowicz, Ph. D. United States Local time: 12:34 | ||||||
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2 | naprężenie szczątkowe równe wartości granicy plastyczności materiału rurociągu |
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naprężenie szczątkowe równe wartości granicy plastyczności materiału rurociągu Explanation: I gather than the yield strength is that of the parent material - the pipe - while the residual stress is that of the weld. ccccccccccc The distribution and the peak value of hoop residual stresses in the girth welded pipe spool were of the order of and exceeding the yield strength of the parent material. This distribution is in line with the profiles available in the codes and standards. After the application of 3% remote strain, the hoop component of the residual stress reduced significantly and yield magnitude residual stress in the weld vanished, whereas the far-field hoop residual stresses increased from negative values to values in the order of 100 - 200MPa. https://www.twi-global.com/EasySiteWeb/GatewayLink.aspx?alId... cccccccc How to treat residual stresses is a key aspect in defect assessment of welded structures. It is generally accepted practice that uniform tensile residual stresses of magnitude equal to the yield stress of the material should be assumed when residual stress profiles are not available for the geometry in question The TWI assessments adopted innovative techniques, combining expert opinion, computer modelling and physical measurement to assess the appropriateness of the yield magnitude residual stress assumption. ftp://www.esrf.eu/pub/UserReports/24271_A.pdf |
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