|
|
Publications
Liu, B. and Guedes Soares, C. (2020), “Ultimate strength assessment of ship hull structures subjected to cyclic bending moments”, Ocean Engineering, Vol. 215, pp. 107685 (10 pages)
The concept of “cyclic ultimate strength” of ship hull structures is proposed. In navigating in waves a ship is subjected to alternate bending moments in hogging and sagging conditions. The present study aims to demonstrate that the ship hull girder can experience a weaker ultimate strength under cyclic loading than under monotonically increasing bending moment as assumed in the conventional analysis. Nonlinear finite element method is employed, using the explicit LS-DYNA solver, to analyse the ultimate strength of a container ship hull structure subjected to monotonic and cyclic bending moments. The numerical analyses under cyclic loading consider the ratcheting effect and the Bauschinger effect in steel. The ship hull girder can break due to the plastic strain accumulation and alternating plasticity collapse when the cyclic external load is greater than the elastic limit but lower than the monotonic ultimate limit. The collapse modes of the hull girder under monotonic and cyclic loadings are compared to reveal their different failure principles.
If you did not manage to obtain a copy of this paper: Request a copy of this article
For information about all CENTEC publications you can download: Download the Complete List of CENTEC Publications
|