Effect Of The Rise/Span Ratio Of A Spherical Cap Shell On The Buckling Load

Khakina, Peter N.; Ali, Mohammed Ibrahim; Zhu, Eryu; Zhou, Huazhang; Moula, Baydaa H.

doi:10.5281/zenodo.1072463

Cited by 2 publications

(1 citation statement)

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“…The classical buckling theory overestimates buckling load, and factors leading to this overestimation are (a) material parameters, (b) geometrical parameters, (c) pre-buckling deformations, (d) boundary conditions, and (e) geometric imperfections 11 . Quantifying geometrical imperfections is difficult as they are introduced during construction.…”

Section: Sandwich Cbh Designmentioning

confidence: 99%

Common Bulkhead Tank Design for Cryogenic Stage of an Indian Launch Vehicle

Singh

Sahu

et al. 2022

Def. Sc. J.

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Indian Space Research Organization (ISRO) has been advancing in space technology with its cost-effective techniques. Currently, ISRO, in its cryogenic stages, uses truss type intertank structure, which induces large concentrated loads at the truss interfaces. As a remedial measure, works on closed intertank are being carried out by them, but this configuration will considerably increase the launch vehicle mass compared to truss type. Therefore, after a thorough literature survey, a Common bulkhead (CBH) tank seemed to be the best solution to the aforementioned problem. Detailed research on sandwich-type CBH has been carried out in this paper with the motivation of saving mass and height in launch vehicles. Suitable core and facesheet material were selected. A novel foam-filled honeycomb core is suggested in this work. Several comparisons in various CBH dome designs were carried out to reach for the best possible configuration and composition that can be used. MATLAB®, SolidWorks®, and ANSYS® were used in parallel for all computations dealing with design and analysis. A mass saving of approximately upto 490 kgs and a height reduction of upto 1.755 m was obtained with the final selected configuration with respect to the current GSLV configuration. These savings can add extra payload capacity to ISRO launch vehicles in their future missions.

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Section: Sandwich Cbh Designmentioning

confidence: 99%

Common Bulkhead Tank Design for Cryogenic Stage of an Indian Launch Vehicle

Singh

Sahu

et al. 2022

Def. Sc. J.

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Buckling Load of Thin Spherical Shells Based on the Theorem of Work and Energy

Khakina¹

2013

IJET

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Abstract-Thin spherical shells usually fail due to buckling. An empirical equation to predict their buckling load is derived based on the theorem of work done and energy released in the inversion of a section of a shell and nonlinear finite element (FE) modeling done using ABAQUS to determine their post-buckling behavior. It is observed that the initial buckling is sensitive to initial geometrical imperfections but the post-buckling load is little influenced. Therefore, the post-buckling load is used to predict a more realistic load as compared to classical buckling theory prediction Index Terms-Imperfections, non-linearity, post-buckling, thin spherical shells

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Effect Of The Rise/Span Ratio Of A Spherical Cap Shell On The Buckling Load

Cited by 2 publications

References 0 publications

Common Bulkhead Tank Design for Cryogenic Stage of an Indian Launch Vehicle

Common Bulkhead Tank Design for Cryogenic Stage of an Indian Launch Vehicle

Buckling Load of Thin Spherical Shells Based on the Theorem of Work and Energy

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