SCF analysis of a pressurized vessel–nozzle intersection with wall thinning damage

Qadir, M.; Redekop, D.

doi:10.1016/j.ijpvp.2009.01.010

Cited by 10 publications

(3 citation statements)

References 17 publications

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“…Then the stress concentration factor and the plastic collapse load were found for intersections with different depths of wall thinning. Qadir and Redekop [180] carried out the 3D FE analysis of a pressurized vessel-nozzle intersection with wall thinning damage. The effect of stress concentration factor (SCF) of wall thinning on damage was examined.…”

Section: Cylinder-cylinder Intersectionsmentioning

confidence: 99%

Junctions in shell structures: A review

Pietraszkiewicz

Konopińska

2015

Thin-Walled Structures

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Section: Cylinder-cylinder Intersectionsmentioning

confidence: 99%

Junctions in shell structures: A review

Pietraszkiewicz

Konopińska

2015

Thin-Walled Structures

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“…However, to achieve accuracy in generating accurate numerical solutions during modeling some factors have to be considered. These factors include boundary conditions, material, domain, and material (Qadir and Redekop, 2009). It is also important to note that FEA analysis can be done using only a small portion possibly a quarter or an eighth of the whole cross-section in symmetrical structures (Masu, 1991) This method helps in reducing the amount of memory that will be needed from the computer memory required and as well as decreasing the run time of the analysis by approximately 75% (Kihiu and Masu, 1995).…”

Section: Measurement Of Stress Distributionmentioning

confidence: 99%

Effects of Geometric Stress Concentration in the Design of Thick Compound Cylinders- A Review

Kiplagat¹,

Masu²,

Nziu³

2020

International Journal of Engineering Research and Technology

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This paper reviews some of the critical considerations that are important during the design of high-pressure vessels. These critical considerations include Stress Concentration Factors (SCF), measurement of stress distribution, and geometric design parameters affecting stress concentration in the design of pressure vessels with a specific focus on thick compound cylinders. Further, the motivation of this study is to analyze stress concentration that occurs after the provision of cross bores in pressure vessels. Stress analysis can be performed using experimental, analytical, and numerical techniques. Hence, the study concluded that there is no known analysis carried out on the effects of cross bores on thick compound cylinders using Finite Element Analysis (FEA). Thus, there is need for understanding the effects of optimization of geometric parameters of cross bore size, shape, location, obliquity and thickness ratio, in the design of thick compound cylinders.

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“…The SCF was least affected by the modulus ratio. On the basis of three dimensional finite element analysis, Oadir and Redekop [2] studied SCF of a specific pressurized vessel-nozzle intersection (tee joint) with wall thinning damage. The effect on the SCF of varying the extent of the wall thinning damage tee joints was observed.…”

Section: Introductionmentioning

confidence: 99%

Stress concentration factor and fatigue analysis of a lateral nozzle with local wall thinning

Chen

Fang

Chen

2019

Engineering Failure Analysis

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After long-term service, metallic pipe components in nuclear power plant, chemical, petroleum industries will experience wear, leading to wall thinning. Severe thinning would affect the structural integrity, and thus a capability was required to assess the thinned components. The greatest weakening was normally near pressurized cylinder and nozzle intersection. In this study, the finite element method was used to determine the remaining structural capacity of lateral nozzles which had been subjected to local wall thinning. The study was divided into two main parts; a stress analysis at the lateral nozzles and piping having wall thinning, and a fatigue analysis of damaged intersections subject to cyclical loading. A finite element analysis (FEA) was carried out for the cylinder-nozzle intersections, to determine the stress concentration factor (SCF). 3D elements were used for the lateral nozzles. An evaluation was made of the effect on the SCF and fatigue damage coefficient of the growth of the thinning away from the intersection. Finally, a parametric study was conducted in which the SCF was computed for a number of intersections, initially considered undamaged, and then with wall thinning damage. Charts based on the results are provided for the convenience of engineers. A preliminary fatigue analysis was carried out to compare the performance under internal pressure of cylinder-nozzle intersections, without and with wall thinning damage. According to orthogonal design method, orthogonal table L9(3 4) was established in order to analyze the SCF and fatigue damage coefficient of lateral nozzle with local wall thinning. Dimensionless relation of SCF, fatigue damage coefficient and defect length, defect depth, defect width and the angle of the cylinder and nozzle was obtained based on multiple regression method, respectively.

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SCF analysis of a pressurized vessel–nozzle intersection with wall thinning damage

Cited by 10 publications

References 17 publications

Junctions in shell structures: A review

Junctions in shell structures: A review

Effects of Geometric Stress Concentration in the Design of Thick Compound Cylinders- A Review

Stress concentration factor and fatigue analysis of a lateral nozzle with local wall thinning

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