Influence of flatness on structural strength of end spherical bulkhead

DOI

10.2991/ifmca-16.2017.125How to use a DOI?

Keywords

spherical bulkhead, flatness, stress strength, ultimate load-bearing capacity, initial deflection

Abstract

The spherical bulkhead structure in style of sphere-toroid-cylinder combined shells is taken as the research object, and its structural strength with different "flatness" is studied. In order to characterize the geometric flat shape of the spherical bulkhead, the concept of "flatness" is put forward preliminary. Systematic numerical simulations of spherical bulkheads with different flatness are performed, and the effects of flatness on stress strength and ultimate bearing capacity are analyzed. The results show that stress on the inner-surface of the toroidal transition is significant with relatively small flatness, and the plastic deformation tends to soon occur and rapidly develop in the toroidal transition until the structure fails. And when the flatness is large (about larger than 0.7), there is high-level bending stress in the spherical shells and the ultimate bearing pressure is affected significantly by the initial deflection. The range of the flatness is suggested to be 0.35~0.55. The conclusion of this paper could provide a reference for the design of spherical-toroid-cylinder combined shells structure.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Jingyi Xiong
AU  - Yong Liu
AU  - Jianjun Ma
PY  - 2017/03
DA  - 2017/03
TI  - Influence of flatness on structural strength of end spherical bulkhead
BT  - Proceedings of the 2016 International Forum on Mechanical, Control and Automation (IFMCA 2016)
PB  - Atlantis Press
SP  - 801
EP  - 809
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifmca-16.2017.125
DO  - 10.2991/ifmca-16.2017.125
ID  - Xiong2017/03
ER  -