Finite Element Analysis of the Mechanical Behavior of Mitered Steel Pipe Elbows under Bending and Pressure

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 damage results are presented by moment-rotation curves. They illustrate the variation in damage as a function of these effects which act simultaneously.

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“…Note that this stress is largely responsible for the damage to the structure. This is mentioned in the work of Spyros [20].…”

Section: Stress Analysismentioning

confidence: 92%

“…he geometries of the analyzed structure are normalized [20] and illustrated in figures 1and (2). The characteristics in elastic-plastic behavior and that of resistance are reported in figure (4) and in table (1).…”

Section: Description Of Model Geometry and Materials Propertiesmentioning

confidence: 99%

Using XFEM to Predict the Damage with Temperature of the Steel Pipe Elbows under Bending and Pressure loading

Hammadi

Mokhtari

Benzaama

et al. 2020

Frattura Ed Integrità Strutturale

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“…mitered elbows, pipe junctions) under severe structural loading has received less attention. The reader is referred to a recent paper by the authors on the structural behavior of mitered bends, where the issues of bending flexibility, stress intensity and local buckling failure are addressed (Karamanos et al, 2016). It is the authors' opinion that the mechanical behavior of pipe fittings subjected to severe groundinduced actions and their effect on steel pipeline response constitutes an open issue that requires further investigation.…”

Section: Pipes Withmentioning

confidence: 99%

Analysis and Design of Buried Steel Water Pipelines in Seismic Areas

Karamanos

Sarvanis

Keil³

et al. 2017

J. Pipeline Syst. Eng. Pract.

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The present paper offers an overview of available methodologies and provisions for the structural analysis and mechanical design of buried welded steel water pipelines subjected to earthquake action. Both transient (wave shaking) and permanent ground actions (from tectonic faults, soil subsidence, landslides and liquefaction-induced lateral spreading) are considered. In the first part of the paper, following a brief presentation of seismic hazards, modelling of the interacting pipeline-soil system is discussed, in terms of either simple analytical models or more rigorous finite elements, pinpointing their main features. In the second part of the paper, pipeline resistance is outlined, with emphasis on the corresponding limit states. Possible mitigation measures for reducing seismic effects are also presented, and the possibility of employing gasketed joints in seismic areas is discussed. Finally, the above analysis methodologies and design provisions are applied in a design example of a buried steel water pipeline, located in an area with severe seismic action.

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Damage investigation of a pressurized elbow pipe using the XFEM technique under severe cyclic loading

Khiari,

Mokhtari,

Telli

et al. 2023

Mechanics of Advanced Materials and Structures

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Finite Element Analysis of the Mechanical Behavior of Mitered Steel Pipe Elbows under Bending and Pressure

Cited by 5 publications

References 3 publications

Using XFEM to Predict the Damage with Temperature of the Steel Pipe Elbows under Bending and Pressure loading

Using XFEM to Predict the Damage with Temperature of the Steel Pipe Elbows under Bending and Pressure loading

Analysis and Design of Buried Steel Water Pipelines in Seismic Areas

Damage investigation of a pressurized elbow pipe using the XFEM technique under severe cyclic loading

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