Ultimate strength and fracture failure of hull stiffened plates based on plastic accumulation under cyclic loading

Cui, Huwei; Ding, Qiyin

doi:10.1016/j.oceaneng.2022.112016

Cited by 6 publications

(2 citation statements)

References 9 publications

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“…The Chaboche combined constitutive model is used to describe the elastic-plastic behavior [22,23] of the new titanium alloy in this paper due to a better description of the cumulative plasticity phenomenon [24,25]. The material parameters obtained from the experiments are shown in Table 2.…”

Section: Numerical Simulation Study Of Fatigue Crack Closure Level 41...mentioning

confidence: 99%

A Study on Fatigue Crack Closure Associated with the Growth of Long Crack in a New Titanium Alloy

Liu,

Chen,

Sun

et al. 2023

Metals

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In this article, the fatigue crack closure in a new titanium alloy is carried out under constant amplitude cyclic loading with the combination of the simulation method and experiments. A numerical simulation of the crack closure effect on a new titanium alloy under different load ratios was carried out to analyze the effect of grid size on the crack closure level and to obtain the fatigue crack opening load level under different load ratios. The experimental study of the fatigue crack growth rate of the new titanium alloy under different load ratios has demonstrated that the fatigue crack growth rate is affected by the stress ratio. With the increase in load ratio, the crack expansion rate of new titanium also increases. Combined with the simulation, the experiments show that the crack closure effect induced by the plastic region at the crack tip is the main reason for the load ratio effect on the fatigue crack expansion rate of the new titanium alloy.

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Section: Numerical Simulation Study Of Fatigue Crack Closure Level 41...mentioning

confidence: 99%

A Study on Fatigue Crack Closure Associated with the Growth of Long Crack in a New Titanium Alloy

Liu,

Chen,

Sun

et al. 2023

Metals

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“…Large amplitude cyclic bending of the hull girder causes corresponding in-plane cyclic shortening of stiffened panels in the deck and double bottom regions. Numerical simulations (Cui and Ding, 2022;Li et al, 2019;Yao and Nikolov, 1990) and experiments (Xu et al, 2022;Cui and Yang, 2018) have shown that cyclic loads that exceed the ultimate strength of the panel demonstrate a distinct nonlinear unloading/reloading pattern and a reduction in strength capacity in subsequent cycles.…”

Section: Cyclic Load-shortening Curvementioning

confidence: 99%

Collapse response analysis of a ship's hull girder in cyclic focused waves using a hydro-elasto-plastic beam model

Tatsumi¹,

Li²,

Benson³

2023

Advances in the Analysis and Design of Marine Structures

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Large waves and whipping effects cause cyclic bending moments on the hull girder that may cause some regions of the structure to exceed the linear limit. In this event nonlinear structural damage/defect (e.g., plasticity and buckling deformation) is accumulated in the structure, which subsequently degrades the ultimate / post-ultimate capacity of the girder. A cyclic load-shortening curve model has been proposed to track the response of stiffened panels under cyclic loading considering the cumulative degradation due to elastoplastic buckling. Separately, a coupled hydrodynamic FE/Smith method (HFS method) has been developed to predict post-collapse response of the hull girder in waves. In this paper the cyclic load-shortening curve is incorporated into HFS method and verified through a case study example. A container ship is excited in a series of focused waves that causes a cyclic response beyond the hull-girder ultimate strength. The effect of different load-shortening curve models on the post-ultimate response of the girder are studied. These show the sensitivity of the reduced hull girder capacity. The results imply that even if the hull-girder collapse stops with partial damage, the hull-girder capacity could be reduced by the cyclic plasticity and the collapse could rapidly progress in subsequent waves.1 Collapse response analysis of a ship's hull girder in cyclic focused waves using a hydro-elasto-plastic beam model

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Study on ultimate strength for stiffened plates with elasto-plastic damages

et al. 2023

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Ultimate strength and fracture failure of hull stiffened plates based on plastic accumulation under cyclic loading

Cited by 6 publications

References 9 publications

A Study on Fatigue Crack Closure Associated with the Growth of Long Crack in a New Titanium Alloy

A Study on Fatigue Crack Closure Associated with the Growth of Long Crack in a New Titanium Alloy

Collapse response analysis of a ship's hull girder in cyclic focused waves using a hydro-elasto-plastic beam model

Study on ultimate strength for stiffened plates with elasto-plastic damages

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