Ultimate strength characteristic and assessment of cracked stiffened panel under uniaxial compression

Yu, Chang Li; Chen, Yan Ting; Yang, Shuo; Liu, Yang; Lu, Guo Chun

doi:10.1016/j.oceaneng.2018.01.015

Cited by 27 publications

(3 citation statements)

References 19 publications

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“…More extensive modeling was carried out by [15] with one and two-half model configurations on bay and span in comparing experimental and FE analysis methods, as seen in Figure 1(b). In 2018 with symmetric boundary conditions, [16] found a difference in normalized strength values of 0.15 compared to the two models where the most extensive configuration has the most significant value. However, in his research, the validity of the data could not be ascertained because the number of models compared was only two.…”

Section: Introductionmentioning

confidence: 81%

Effect of design parameters on the ultimate strength and collapse behaviour of stiffened panels

Hanif

Adiputra²,

Prabowo

et al. 2023

J Appl Eng Science

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Research about stiffened panel applications in ships has massively progressed with the amount of several methods to analyze it. Various studies had been conducted on stiffened panels using Finite Element Method (FEM). However, none have thoroughly explored the most optimal and efficient analysis methods and settings. Given the growing importance of FEM in reliability analysis for ship structures, particularly stiffened panels, a comprehensive study comparing different approaches is of paramount significance. Such research would not only streamline time-consuming procedures but also offer invaluable recommendations to advance the field's understanding and practical applications. In this paper, a finite element analysis study was done to analyze the influence of several parameter modeling of stiffened panels not only to achieve the models' ultimate strength value and collapse behavior but also to offer practical recommendations on the most optimal and efficient methods for analyzing stiffened panels through FEM. Conducting modification of three variations of the model configuration, four variations of boundary condition, and four variations of transverse stiffener modeling to compare each other. Running time consumed when simulations are calculated in ANSYS APDL was also being considered. The results showed a significant difference in modifying the model configuration's case, while in contrast, the modification of boundary conditions and transverse stiffener modeling only showed a slight difference in ultimate strength value. In addition, modification of transverse stiffener geometry only gave the difference by around 0.5 MPa. The model configuration case (A1 v A2) showed the most remarkable running time difference, which reached six times difference.

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Section: Introductionmentioning

confidence: 81%

Effect of design parameters on the ultimate strength and collapse behaviour of stiffened panels

Hanif

Adiputra²,

Prabowo

et al. 2023

J Appl Eng Science

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“…The analytical method used in CSR (2019) [1], proposed by Gordo and Soares (1993), neglects the welding induced geometric distortions and residual stresses and is not flexible to incorporate the realistic imperfections involved with production. On the other hand, nonlinear finite element analysis (FEA) has proven to be adequate for modeling distortions and residual stresses in stiffened panels, such as part or pit corrosion (Paik et al , 2003a, b; Shi et al , 2018), cracks (Cui et al , 2016; Paik et al , 2005; Yu et al , 2018), dents (Ao et al , 2020; Paik et al , 2003a, b), collision (Paik and Seo, 2007), grounding or other production and operational issues.…”

Section: Introductionmentioning

confidence: 99%

Construction of surrogate models for predicting the buckling strength of stiffened panels through DoE and RSM methods

Papanikolaou

Anyfantis

2021

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PurposeExperimental mid/large scale testing of ship-like stiffened panels in compression is a quite expensive exercise that is not standard. Numerical simulations are preferred instead. Because of being relatively inexpensive (cost and time wise), most authors perform an exhaustive design space exploration arriving at a significant number of runs. This work demonstrates that the buckling response with respect to the nondimensional slenderness ratios may well be fitted with nine runs per stiffener geometry.Design/methodology/approachEfficient derivation of buckling strength formulas for stiffened panels through the employment of design of experiments (DoE) and response surface methodology (RSM) combined with numerical nonlinear experimentation over the entire range of practical geometries.FindingsThe surrogate model developed for T-bar stiffeners predicts accurately enough the ultimate stress in the practical design area, while the surrogate models for angle bars and flat bars demonstrate difference between 10 and 30% from common structural rules (CSR).Originality/valueTo the authors' best knowledge, the statistical-based formal and rigorous approach of DoE and RSM to obtaining buckling surfaces for stiffened panels is performed for the first time. The number of required observations per stiffener type has not been addressed yet as each work selects its own sampling scheme without formal reasoning. This work comes to frame the number of observations for efficient surrogate model building.

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“…Recently, more attention has been paid to the numerical analysis. The ultimate strength of different structural elements subjected to cracks was investigated, including plates [12][13][14][15][16], stiffened plates [15,17], stiffened panels [18], box girders [19] and ageing ship hulls [20]. Based on these studies, the governing factors that have the most influence on the structural capacity reduction can be identified.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Ultimate Compressive Strength of Cracked Plates with the Use of DoE Techniques

Woloszyk

Garbatov²

2020

Polish Maritime Research

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The objective of this work is to investigate the structural compressive response of plates with locked cracks accounting for all relevant factors and correlation between them. The nonlinear FE model considering both geometric and material nonlinearities is employed herein, and the FE model of the structural response of intact plates is validated with the available experimental data. In the common studies, based on One Factor at a Time analysis, some of the parameters and interactions between them are excluded. In the present study, the numerical investigations are conducted with the use of the Design of Experiments techniques, where all essential parameters and their interactions are adequately considered. With a total of 32 numerical analyses, the most influential factors and their interactions are identified. As a study outcome, empirical formulations, which allow for a fast estimation of the ultimate compressive strength of intact plates, plates with locked cracks, and repaired cracked plates, are derived. The developed formulations represent a fast and practical tool for estimating the ultimate compressive strength of intact, cracked, and repaired plates, which can be easily employed in the reliability analysis.results followed by their discussion.

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Ultimate strength characteristic and assessment of cracked stiffened panel under uniaxial compression

Cited by 27 publications

References 19 publications

Effect of design parameters on the ultimate strength and collapse behaviour of stiffened panels

Effect of design parameters on the ultimate strength and collapse behaviour of stiffened panels

Construction of surrogate models for predicting the buckling strength of stiffened panels through DoE and RSM methods

Analysis of Ultimate Compressive Strength of Cracked Plates with the Use of DoE Techniques

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