کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5016899 1466053 2017 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Non-linear finite element modelling and analysis of the effect of gasket creep-relaxation on circular bolted flange connections
ترجمه فارسی عنوان
مدل سازی و تجزیه و تحلیل عنصر محدود غیر خطی اثر لغزش آرام سازی واشر بر اتصالات پیچ فلنج دایره ای
کلمات کلیدی
مهر و موم تمیز، فشار تماس فلنج صورت تخت، فلنج چهره افزایش پیچش،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی
It is well known that gasket creep-relaxation results in a reduction of contact pressure between the surface of a gasket and the face of a flange over an extended period of time. This reduction may result in the subsequent failure of the circular bolted flange connection due to leakage. In this paper a pair of flat and raised face integral flanges, PN 10 DN 50 (in accordance with the European EN 1092-1 standard), with non-asbestos compressed fibre ring gaskets with aramid and a nitrile rubber binder were considered. Finite element modelling and analyses were done, for both the circular bolted flange configurations, during the seating condition. The results of the finite element analyses were experimentally validated. It was found that the number of bolt tightening increments as well as the time between the bolt tightening increments had a significant impact on the effect which gasket creep-relaxation had after the seating condition. An increase in either the number of bolting increments or the time between the bolting increments will reduce the effect which gasket creep-relaxation has once the bolts had been fastened. Based on these results it is possible to develop an optimisation scheme to minimize the effect which gasket creep-relaxation has on the contact pressure between the face of the flange and the gasket, after seating, by either increasing or decreasing the number of bolt tightening increments or the time between the bolt tightening increments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Pressure Vessels and Piping - Volume 150, February 2017, Pages 52-61
نویسندگان
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