ELASTIC-PLASTIC LIMIT ANALYSIS OF THE COMBINED THICK-WALLED CYLINDER BASED ON THE UNIFIED STRENGTH THEORY

Journal article

Authors/Editors

WUDHICHAI ASSAWINCHAICHOTE

Strategic Research Themes

Other (Strategic Research Themes)

Publication Details

Author list: Ao W., Wang X., Zhang H., Assawinchaichote W., Liu Z.

Publication year: 2022

Journal: International Journal of Innovative Computing, Information and Control (1349-4198)

Volume number: 18

Issue number: 1

Start page: 183

End page: 197

Number of pages: 15

ISSN: 1349-4198

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85122148491&doi=10.24507%2fijicic.18.01.183&partnerID=40&md5=497eb96e94871393f7afb1bf9d9c9ad9

Languages: English-Great Britain (EN-GB)

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Abstract

This paper adopts the unified strength theory (UST) to deduce the unified solution of the elastic limit, plastic limit and stability limit internal pressures of the thick-walled cylinder and the elastic limit and plastic limit internal pressures of double-layered thick-walled cylinder, and uses the simplified unified solution to draw a conclusion consistent with other literature, demonstrating the correctness of the derivation in this paper. In this paper, examples are used to analyze the impact of diameter ratio and UST parameters on the elastic limit, plastic limit and stability limit of the thick-walled cylinder. The results show that the unified solution increases with the increase in diameter ratio and influence factor of intermediate stress and reduces with the increase in the compressive and tensile strength of materials; as the diameter ratio increases, its impact on the improvement of the elastic limit internal pressure is significantly diminished, while its impact on the increase of the plastic limit internal pressure is significant; the prestressing force between internal and external cylinders can significantly increase the elastic limit internal pressure of the combined thick-walled cylinder, but it has hardly no impact on the plastic limit internal pressure of the combined thick-walled cylinder. This study can provide the theoretical basis of strength design for the engineering application of the thick-walled cylinder structures, e.g., culvert pipes, composite supports, extrusion dies, cylindrical pressure vessels, air cylinders and gun barrels. © ICIC International 2022.

Keywords

Elastic limit internal pres-sure, Plastic limit internal pressure, Stability limit internal pressure, Thick-walled cylinder, Unified strength theory