Izvorni znanstveni članak

https://doi.org/10.21278/TOF.43102

A Study on the Explicit Expression of Critical Stress and Euler Stress and its Application

Zhixin Xiong ; College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai, China
Peilin Luo ; College of Shipbuilding Engineering, Harbin Engineering University, Harbin, Heilongjiang, China
Xiaochuan Yu ; School of Naval Architecture and Marine Engineering, University of New Orleans, New Orleans, USA

Sažetak

Both the tangent modulus theory and the double modulus theory are classical theories which can be applied to the elastic-plastic stability analysis of columns. In the traditional tangent modulus theory, numerous iterations are required to calculate the critical buckling stress and this makes the method very time-consuming. In this paper, an explicit formula for establishing a direct correlation between the critical stress and the Euler stress has been proposed to reduce trial calculations. This formula can be applied to spherical shells by simplifying their stiffened plates to the form of beams on elastic foundations. The explicit expressions of both modulus theories can be used to calculate the ultimate strength of a spherical shell under pressure. The results from the proposed expression are compared with experimental results and other numerical results.

Ključne riječi

tangent modulus; double modulus; beam on an elastic foundation; spherical shell; critical stress

Hrčak ID:

220042

URI

https://hrcak.srce.hr/220042

Datum izdavanja:

17.5.2019.

Posjeta: 1.540 *