Opening reinforcement design and buckling of spherical shell subjected to external pressure

Zhu, Yumei; Ma, Qiong; Zhang, Jian; Tang, Wenxian; Dai, Yongjian

doi:10.1016/j.ijpvp.2017.10.006

Cited by 21 publications

(6 citation statements)

References 12 publications

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“…This temperature corresponds to design pressure, and it is maintained in the RPV materials for the specified operation. Inside pressure (or helium pressure) is normally greater than the outside pressure (or containment pressure) [1,[13][14][15].…”

Section: Methodsmentioning

confidence: 99%

Cylindrical Shell Analysis of Reactor Pressure Vessel for Rde

Sudadiyo

2021

gnd

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CYLINDRICAL SHELL ANALYSIS OF REACTOR PRESSURE VESSEL FOR RDE. This study deals with the analysis of cylindrical shell design for Reactor Pressure Vessel (RPV) of Reaktor Daya Eksperimental (RDE).The RDE is developed by BATAN as the preliminary of nuclear technology in Indonesia. RPV is a container for confining helium gas at pressure (3 MPa) and temperature (circa 250 C). In reactor operation, mechanical stresses act to the RPV as in consequence of internal pressure, external pressure, and different loads due to dead weight and helium content load. Therefore, if the RPV could not retain its material strength it will cause failure. The applications and validity of Fortran code (RPV_RDE.exe) for the design analysis are represented by two simulation cases, which show good calculation results of design outputs compared to analytical solutions by hand calculations. Design outputs have met the safety requirements (on ultimate tensile strength 485 MPa) for the minimum wall thickness of cylindrical shell in upper portion of 60 mm with Hoop stress 104.47 MPa and in lower portion of 100 mm with Hoop stress 62.81 MPa, respectively.

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Section: Methodsmentioning

confidence: 99%

Cylindrical Shell Analysis of Reactor Pressure Vessel for Rde

Sudadiyo

2021

gnd

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“…A good comparison of theoretical results with experimental data has been shown. Zhu et al [17] optimized the parameters of opening reinforcements used in spherical shells to have minimum instability in buckling. The optimization results were then used to fabricate experimental test models.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Modelling for Bending and Vibration Analysis of Composite and Sandwich Spherical Shells

Parmar

Rahman

Alam

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Finite element modelling is used to illustrate the bending and vibration response of composite and sandwich spherical shells. ABAQUS is used to model the shell as a three-dimensional deformable solid part. Composites are modelled using mixed modelling technique. The quadrilateral continuum shell element, which has eight nodes, is used for finite element meshing. For a three-layered composite spherical shell with simply supported boundary conditions, the accuracy of the employed element is first evaluated. After that, three potential end conditions are evaluated for further analysis: cantilever (CFFF), two opposing sides clamped (CFCF), and all sides clamped (CCCC). Bending response is produced by applying two types of pressure loads to the exterior surfaces of composite and sandwich spherical shells: uniformly distributed load (UDL) and sinusoidal load (SINO). For various span to thickness ratios, free vibration response and forced vibration response (Time History) are provided under step pressure (UDL and SINO) loading. The element type being used is found to be quite precise and sturdy.

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“…The pressure hull is an important part of the deep-sea submersible. Existing large-depth manned submersibles adopt spherical pressure shells, which have the advantages of simple structure, uniform force, good bulk density, and bearing capacity, and which play a role in ensuring the normal operation of internal equipment and personnel safety during the dive [1,2]. The spherical shell is a medium-thickness shell formed by hemisphere stamping and welding along the equator.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Surface Crack Growth of Maraging Steel Spherical Pressure Shell

Zhu

Yang

2021

JMSE

Self Cite

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This study focused on the three-dimensional surface crack growth of a spherical pressure shell. Eight maraging steel 18Ni (250) samples were fabricated and tested, and the fatigue crack growth rate curves were obtained. Considering the influence of plastic closure effect and sample thickness on crack growth, the fitting formula of fatigue crack growth only related to materials was obtained. Based on the three-dimensional crack closure theory and the strip yield model, a three-dimensional surface crack growth model of spherical pressure shell was established. By using a self-written program and FRANC3D, the three-dimensional surface crack growth simulations of the spherical shell were completed. The influence of the initial shape ratio and initial depth of the crack on the crack growth and the fatigue life of the spherical shell was analyzed.

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Opening reinforcement design and buckling of spherical shell subjected to external pressure

Cited by 21 publications

References 12 publications

Cylindrical Shell Analysis of Reactor Pressure Vessel for Rde

Cylindrical Shell Analysis of Reactor Pressure Vessel for Rde

Finite Element Modelling for Bending and Vibration Analysis of Composite and Sandwich Spherical Shells

Three-Dimensional Surface Crack Growth of Maraging Steel Spherical Pressure Shell

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