Issue 55

N. Hammadi et alii, Frattura ed Integrità Strutturale, 55 (2021) 345-359; DOI: 10.3221/IGF-ESIS.55.27

Using XFEM to predict the damage with temperature of the steel pipe elbows under bending and pressure loading

N. Hammadi, M. Mokhtari Laboratoire La RTFM, Ecole Nationale Polytechnique Maurice Audin, Oran, Algeria hammadi.nourddine@grtg.dz mokhtarimohamed44@yahoo.fr, https://orcid.org/0000-0002-2014-1172 H. Benzaama Laboratoire LABAB, Ecole Nationale Polytechnique Maurice Audin, Oran, Algeria habenza@yahoo.fr, https://orcid.org/0000-0002-7145-3758 K. Madani Laboratoire Mécanique Physique des Matériaux (LMPM), Sidi Bel Abbes, Algeria koumad10@yahoo.fr, https://orcid.org/0000-0003-3277-1187 A. Brakna Laboratoire La RTFM, Ecole Nationale Polytechnique Maurice Audin, Oran, Algeria aek.kaki829@gmail.com E. Abdelouahed Laboratoire LABAB, Ecole Nationale Polytechnique Maurice Audin, Oran, Algeria heabamine@gmail.com, https://orcid.org/0000-0002-6923-5305 A BSTRACT . The pipes, during their service, are subjected to accumulated loads such as internal pressure and that of the soil. The latter considerably accelerate their damage. In this work, the bending moment stress of API 5L X70 category steel elbows under thermo-mechanical behavior and in the presence of pressure were studied. We used FEM (finite element method) through the numerical calculation code ABAQUS and the XFEM technique for structural damage while using solid elements as a structure. Our objective is to evaluate the response and resistance capacity of the steel elbow by its location in the tube – elbow-tube system under a mixed loading of pressure and moment for all scenarios. It is based on a single standardized dimensioning of the elbow (diameter and thickness). The effect of several parameters has been studied such as the type of loading and the pressure levels, which are clearly conditioned by the level of damage. Numerical

Citation: Hammadi, N., Mokhtari, M., Benzaama, H., Madani, K., Brakna, K., Abdelouahed, E., Using XFEM to predict the damage with temperature of the steel pipe elbows under bending and pressure loading, Frattura ed Integrità Strutturale, 55 (2021) 345- 359.

Received: 20.09.2020 Accepted: 27.12.2020 Published: 01.01.2021

Copyright: © 2021 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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