Issue 49

E. Abdelouahed et alii, Frattura ed Integrità Strutturale, 49 (2019) 698-713; DOI: 10.3221/IGF-ESIS.49.63

Finite Element Analysis of the thermo-Mechanical Behavior of composite Pipe Elbows under Bending and Pressure loading

E. Abdelouahed Laboratoire LABAB, Ecole Nationale Polytechnique Maurice Audin, Oran, Algeria heabamine@gmail.com M. Mokhtari Laboratoire LaRTFM, Ecole Nationale Polytechnique Maurice Audin, Oran, Algeria mokhtarimohamed44@yahoo.fr H. Benzaama Laboratoire LABAB, Ecole Nationale Polytechnique Maurice Audin, Oran, Algeria Habenza@yahoo.fr A BSTRACT . Elbows under load experience more stress and strain than straight tubes. The strength of the composite tubes plays an important role in their use, the damage under a thermomechanical behavior of a composite tubular structure bent between two linear parts is studied in this work. The HASHIN criterion model is used through finite element analysis. The main objective is to predict the effect of the main parameters by curves of torque, using the calculation code ABAQUS. These evaluative parameters are addressed to the geometrical conditions of the elbow, in loading mode on the pressurized structures and to the danger of the defect, hence the advantage of using Shell elements as a structure. The numerical results obtained illustrate that the parameters studied condition the level and the mode of failure as well as the response of composite elbows. K EYWORDS . FEM; Damage; Elbows; Hashin criterion; Shell element.

Citation: Abdelouahed, E., Mokhtari, M., Benzaama, H., Finite Element Analysis of the thermo-Mechanical Behavior of composite Pipe Elbows under Bending and Pressure loading, Frattura ed Integrità Strutturale, 49 (2019) 698-713.

Received: 21.04.2019 Accepted: 09.06.2019 Published: 01.07.2019

Copyright: © 2019 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.

I NTRODUCTION

omposite materials used in piping design in industries such as nuclear power plants, oil-gas, energy and environment, are imposed by their operating ranges from -30°C to 120°C and 8 at 15 bars. This also depends on chemical constraints such as corrosion. Their normalization remains difficult given these numerous dependencies. Homogenization models remain the appropriate approach to estimate them from these characteristics. Several important elements in the mechanical analysis of composite materials such as folds that must comply with the surface curvature, dimensioning such as thickness, diameter and radius of curvature have known several international C

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