Numerical modeling and comparison study of elliptical cracks effect on the pipes straight and with thickness transition exposed to internal pressure, using XFEM in elastic behavior.

Salmi, H.; Hachim, A.; El Bhilat, H.; El Had, K.

doi:10.22061/jcarme.2019.3597.1448

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	Numerical modeling and comparison study of elliptical cracks effect on the pipes straight and with thickness transition exposed to internal pressure, using XFEM in elastic behavior.
Journal of Computational & Applied Research in Mechanical Engineering (JCARME)
مقاله 17، دوره 10، شماره 1 - شماره پیاپی 19، مهر 2020، صفحه 229-244 اصل مقاله (1.68 M)
نوع مقاله: Review paper
شناسه دیجیتال (DOI): 10.22061/jcarme.2019.3597.1448
نویسندگان
H. Salmi^* ¹؛ A. Hachim²^{، 1}؛ H. El Bhilat¹؛ K. El had²^{، 1}
¹National Higher School of Electricity and Mechanics Laboratory of Control and Mechanical Characterization of Materials and Structures, Casablanca, Morocco
²Higher Institute of Maritims Studies, Laboratory of Mechanics Country,Casablanca,Morocco
تاریخ دریافت: 15 تیر 1397، تاریخ بازنگری: 16 بهمن 1397، تاریخ پذیرش: 01 اسفند 1397
چکیده
The present work deals with the effect of an external circumferential elliptical crack located at thickness transition on a varied stepped diameter pipe . The purpose is the application of the extended finite element method (XFEM) for the calculation of SIF at the thickness transition region of pipe considering internal pressure and compare the effect of the crack between pipes straight and with thickness transition. To model a crack with precision , enrichment functions are used to enrich the displacement approximation, the level set functions are calculated from the crack mesh and definition of the strategy of integration has been performed. A comparative study is made on SIF of crack defect in straight pipe compared to one with thickness transition using XFEM for the crack and pipe geometrical parameters variations. The result shows that the XFEM is an effective and practical tool for elliptic crack modeling in a pipe with thickness transition because a crack is easily modeled through enrichment functions.The comparison of the SIF of a similar defect between pipes shows that a pressurized pipe with thickness transition is more sensitive to the used cracks.
کلیدواژه‌ها
XFEM؛ Pipe with thickness transition؛ Stress intensity factor؛ Elliptical crack؛ Internal pressure

مراجع
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Numerical modeling and comparison study of elliptical cracks effect on the pipes straight and with thickness transition exposed to internal pressure, using XFEM in elastic behavior.