A comparison of geometric imperfection models for collapse analysis of ship-type stiffened plated grillages

Li, Shen; Georgiadis, Dimitris G.; Kim, Do Kyun; Samuelides, Manolis

doi:10.1016/j.engstruct.2021.113480

Cited by 13 publications

(3 citation statements)

References 44 publications

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“…In that case, it was recommended to apply the initial deflections between 50% to 10% of the thickness. 22,[55][56][57] Therefore, the imperfection values were assumed to be 10% of the specimen thickness. By considering the whole numerical processes, finite element analyses were built in two steps as linear buckling analysis of the parts without imperfections and non-linear analysis of the parts with imperfections.…”

Section: Numerical Analysismentioning

confidence: 99%

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A new parameter to describe crippling strength: Experimental and theoretical investigations for post‐buckling behaviors of the composite structures

Yıldırım,

Ünal

2023

Polymer Composites

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The post‐buckling strength, which is simply called as crippling, is investigated for laminated composite structures in this study. L profiles that had various stacking sequences of carbon fiber reinforced epoxies were tested. Three different layups configurations were used by changing flange‐to‐thickness ratios. The main objective of this research was to show that flange‐to‐thickness ratio was not the only effecting parameter for crippling. Therefore, a new parameter, EGY number, was developed by considering the positions of 0° and 45° plies. Depending on EGY number, a new semi‐empirical formulation was presented to calculate crippling strength of the laminated composite structures. One of the test results was employed to verification of EGY number. In addition, the test results were validated with finite element analyses. Static, Riks and Dynamic, Explicit computational results were compared to simulate the experiments.Highlights Determination of crippling strength both experimentally and theoretically. Comparison of numerical models: Static, Riks versus Dynamic, Explicit. Developing a new parameter called as EGY number. Developing of a new analytical semi‐empirical formula for crippling strength.

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Section: Numerical Analysismentioning

confidence: 99%

“…Besides, it should be noted that the sensitivity of the finite element models decreased for low imperfections. In that case, it was recommended to apply the initial deflections between 50% to 10% of the thickness 22,55–57 . Therefore, the imperfection values were assumed to be 10% of the specimen thickness.…”

Section: Numerical Analysismentioning

confidence: 99%

A new parameter to describe crippling strength: Experimental and theoretical investigations for post‐buckling behaviors of the composite structures

Yıldırım,

Ünal

2023

Polymer Composites

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“…In paper [32], where the ultimate strength of stiffened panels of ships considering uncertainties in geometrical aspects was assessed, the initial geometric imperfection was imposed in the form of a column imperfection mode on the entire stiffened panel, a torsional imperfection mode on the stiffener and a local imperfection mode on the plate and flange. The authors in [4] introduced a newly proposed probabilistic-based imperfection model via the spectral representation method, while in paper [33], a comparison of the prevailing geometric imperfection models (e.g., hungry-horse mode, admiralty research establishment mode and critical buckling mode) and their influence on the ultimate compressive strength of ship grillages is completed.…”

Section: Stochastic Models Of the Parameters Of The Problemmentioning

confidence: 99%

A Methodological Framework for Structural Reliability Assessment of Marine Structural Elements

Mantzakopoulou,

Anyfantis

2023

JMSE

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The aim of this paper is to provide a robust framework to assist researchers in deciding which methods to use, depending on the problem at hand, in order to estimate the probability of failure of marine structural parts that are subjected to variable loads (both hull-girder and local pressure loads) that exhibit uncertainties in their material properties and that involve fabrication-related uncertainties. The limitations of analytical approaches both in deterministic mathematical modeling (strength formulas) and probabilistic estimation will be provided, and respective computational tools will be demonstrated (FEA and Monte Carlo simulation). The approach is showcased in flat and bow-defected rectangular plates through analytical and numerical approaches.

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Fibre-Based modelling for predicting the progressive collapse of cylindrical shells under combined axial compression and bending moment

Shen

Kim

Liang

2022

Engineering Structures

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A comparison of geometric imperfection models for collapse analysis of ship-type stiffened plated grillages

Cited by 13 publications

References 44 publications

A new parameter to describe crippling strength: Experimental and theoretical investigations for post‐buckling behaviors of the composite structures

A new parameter to describe crippling strength: Experimental and theoretical investigations for post‐buckling behaviors of the composite structures

A Methodological Framework for Structural Reliability Assessment of Marine Structural Elements

Fibre-Based modelling for predicting the progressive collapse of cylindrical shells under combined axial compression and bending moment

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