Numerical Simulations of Pressurized Elbow under Reversed In-Plane Bending

Chen, Xiao Hui; Chen, Xu

doi:10.4028/www.scientific.net/amr.785-786.16

Cited by 2 publications

(3 citation statements)

References 5 publications

(4 reference statements)

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“…In the case of active loading, the von Mises yield condition is assumed in this form ( ) ( ) (5) where s is the deviatoric part of the stress tensor σ, a is the deviatoric part of the back stress α, which directs the position of the yield surface with the initial size of the elastic region σY, and R is the isotropic variable.…”

Section: Fem Predictionmentioning

confidence: 99%

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FE Prediction and Extrapolation of Multiaxial Ratcheting for R7T Steel

Halama

Bartecká

Gál

2019

KEM

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Wear of materials in rail/wheel industry is closely related to the cyclic creep. This contribution presents main results of experimental testing on R7T wheel steel. The cyclic creep is investigated under non-proportional loading conditions simulating a line rolling contact case. McDowell extrapolation was successfully applied to the calculation of twist. Cyclic material model MAKOC and MAKOC with memory surface were used for cyclic creep prediction. The plasticity model is based on AbdelKarim-Ohno kinematic hardening and Calloch isotropic hardening rules. Second material model was extended with Jiang-Sehitoglu memory surface, which is introduced in stress space. Material models were successfully used for predicting accumulation of shear strain.

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Section: Fem Predictionmentioning

confidence: 99%

“…The accumulation of plastic strain is very dangerous and engineers should be able to predict the phenomenon in product design. One of important applications are axisymmetric pressure vessels and piping [4,5]. The internal pressure influences accumulation of the hoop strain.…”

Section: Introductionmentioning

confidence: 99%

FE Prediction and Extrapolation of Multiaxial Ratcheting for R7T Steel

Halama

Bartecká

Gál

2019

KEM

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“…Pipe bends and elbows are common structural elements and often represent the weakest link in pressure piping during extreme loading such as earthquakes . Therefore, their performance and behaviour during seismic events are critical from the structural integrity point of view.…”

Section: Introductionmentioning

confidence: 99%

Effect of wall thinning on deformation and failure of copper‐nickel alloy elbows subjected to low cycle fatigue

Harun

Mohammad

Kotousov

2019

Mat Design & Process Comms

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Various industrial standards and safety regulations specify the minim number of cycles, which pressure equipment must tolerate during a single seismic event. The compliance with these standards and regulations is necessary in order to ensure safety and strength of critical structural components, eg, pressure pipe system of the primary coolant loop of nuclear reactors or condensed water supply of large hospitals or other large facilities. However, the strength can degrade with time due to flow accelerated corrosion causing wall thinning. Pipe bends are particularly susceptible to the localised corrosion, and, therefore, these structural elements need a special consideration. The current paper studies the effect of localised corrosion on low cycle fatigue behaviour of a copper-nickel elbows using experiment and finite element method (FEM). The outcomes of the study demonstrate a quite low reduction of low cycle fatigue life even at severe local wall thinning at different locations.

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Numerical Simulations of Pressurized Elbow under Reversed In-Plane Bending

Cited by 2 publications

References 5 publications

FE Prediction and Extrapolation of Multiaxial Ratcheting for R7T Steel

FE Prediction and Extrapolation of Multiaxial Ratcheting for R7T Steel

Effect of wall thinning on deformation and failure of copper‐nickel alloy elbows subjected to low cycle fatigue

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