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مجله بین المللی مخازن تحت فشار و لوله کشی
جزئیات رویداد
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  • proposal of reference stress for a surface flaw on a cylindrical component from a review-with-comparison of the local metal loss assessment rule between api 579-1 and the p-m diagram method

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    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 1051
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the remaining strength factor (rsf) approach in part 5 of api 579-1/asme ffs-1 is an assessment method for a cylindrical component with a local metal loss based on surface correction factors. also, reference stress solutions that are applied in the failure assessment diagram (fad) method for a cylindrical component with a crack-like flaw are provided in annex d using surface correction factors. in the recently-developed p-m diagram method, the reference stress solution for local metal loss evaluation in a cylindrical component is derived using bulging factors, which are similar but not identical to the surface correction factors used in api 579-1/asme ffs-1. this paper describes the results of a comparative study among the rsf approach, reference stress solutions for the fad method, and the p-m diagram method, in terms of plastic collapse evaluation of a cylindrical component. these results were compared with the fea and experimental results to confirm how these estimated stresses could be validated. this study also involves recommended reference stress solutions for a cylindrical component with a crack-like flaw or a local metal loss, which should be adopted as fitness-for-service rules, and a discussion on the influence of the design margin of the construction code on allowable flaw depth.

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