On the imperfection sensitivity and design of tori-spherical shells under external pressure

Wagner, H.N.R.; Niewöhner, G.; Pototzky, Alexander; Hühne, Christian

doi:10.1016/j.ijpvp.2021.104321

Cited by 12 publications

(3 citation statements)

References 42 publications

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“…According to the design size of the pressure-resistant shell, the pressure-resistant spherical shell of the equipment has a radius-thickness ratio of more than 20, which belongs to the range of the thin shell. When they are exposed to high external pressure, the structure can be prone to buckling, and this critical buckling load is highly influenced by the geometric shape, wall thickness, material properties, and initial imperfections [25][26][27]. The instability analysis of the thin shell should be carried out according to the nonlinear large deflection theory [28].…”

Section: Stability Analysis Of the Pressure-resistant Shellmentioning

confidence: 99%

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Optimized Design of the Carrier Structure of an Autonomous Glide Marine Seismometer

Li,

Zhu,

Qin

et al. 2023

JMSE

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Mobile Earthquake Recording in Marine Areas by Independent Divers (MERMAID) provides a possibility for long-term and large-scale observation of natural seismic P waves, but it does not have mobility and can only drift with ocean currents, resulting in observation equipment locations that are too sparse or too dense, both of which are not suitable for network observation. Therefore, this paper developed a new type of Autonomous Glide Marine Seismometer (AGMS) with mobility and the ability to adjust the observation position. The AGMS adopts a flying saucer shape, which has better hydrodynamic characteristics and better motion stability. This paper focused on the material, shape, and structure of the pressure-resistant shell for the selection of design and strength checking research. Using the finite element analysis method and introducing the initial defect, the results showed that the yield strength of the pressure-resistant shell decreases with the initial defect value. The calculation results were compared and analyzed with the relevant theoretical formulas and specification calculation results, and all the results met the design requirements. The results of this design could also provide reference for the design of related deep-sea pressure chambers.

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Section: Stability Analysis Of the Pressure-resistant Shellmentioning

confidence: 99%

“…At present, scholars around the world study the strength stability of the pressureresistant shell of the submersible by using the finite element analysis method [25][26][27][28][29][30]. They compare and analyze it with the relevant theoretical formulas and related standards.…”

Section: Stability Analysis Of the Pressure-resistant Shellmentioning

confidence: 99%

Optimized Design of the Carrier Structure of an Autonomous Glide Marine Seismometer

Li,

Zhu,

Qin

et al. 2023

JMSE

View full text Add to dashboard Cite

show abstract

“…[12,13] reducing or avoiding the cracking of thin-walled microspheres during subsequent drying and service is a challenge for the research preparation of thin-walled polymer hollow microspheres, because their compressive strength decreases due to an increased diameter to thickness ratio. [14] Nakano et al concluded that acrylonitrile contributed to the tensile strength of PS and that microspheres prepared from styrene-acrylonitrile copolymer (AS) enhanced the strength of thin-walled microspheres, but the thin-walled microspheres still broke with ongoing drying. [15] Pan et al reduced the cracking rate of millimeter-sized polymer hollow microspheres by optimizing the drying process, but the yield microspheres were still not high enough when the method was applied to thin-walled microspheres.…”

Section: Introductionmentioning

confidence: 99%

Effect of polymer molecular structure on the quality of thin‐walled hollow microspheres for inertial confinement fusion

Zhu

et al. 2023

Polymer Engineering & Sci

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Polymer microspheres can be used as fuel containers for laser inertial confinement fusion (ICF) due to their low atomic number, low density, and high thermal stability. The thin-walled polymer microspheres are prone to cracking due to an increase in the diameter to thickness ratio (diameter/wall thickness).The effect of polystyrene (PS) and Poly (α-methyl styrene) (PAMS) materials commonly used in ICF experiments on the quality of thin-walled microspheres is investigated. PS hollow microspheres show better sphericity, smoother surface, and lower cracking rate than PAMS microspheres. Moreover, the heat treatment of solidified PS microspheres can improve the strength so that the cracking rate of the microspheres decreases. The relative mechanism of how the molecular structure affect the quality is also discussed. This study provides some guidance for the preparation of thin-walled polymer microspheres with high quality for ICF experiments.

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Multifunctional trace of various reinforcements on vibrations of three-phase nanocomposite combined hemispherical-cylindrical shells

Sobhani

Moradi‐Dastjerdi²,

Behdinan³

et al. 2022

Composite Structures

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On the imperfection sensitivity and design of tori-spherical shells under external pressure

Cited by 12 publications

References 42 publications

Optimized Design of the Carrier Structure of an Autonomous Glide Marine Seismometer

Optimized Design of the Carrier Structure of an Autonomous Glide Marine Seismometer

Effect of polymer molecular structure on the quality of thin‐walled hollow microspheres for inertial confinement fusion

Multifunctional trace of various reinforcements on vibrations of three-phase nanocomposite combined hemispherical-cylindrical shells

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