Experimental study of collision in scaled naval structures

Oshiro, R.E.; Calle, M.A.G.; Mazzariol, L.M.; Alves, Marcı́lio

doi:10.1016/j.ijimpeng.2017.01.024

Cited by 33 publications

(15 citation statements)

References 35 publications

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“…There are many works on experimental testing of colliding ships [263][264][265][266][267][268][269][270]. In all of them, the ships are scaled-down, sometimes significantly (1/45 [263], 1/35 [267], and 1/100 [268] scaled models).…”

Section: Naval and Marinementioning

confidence: 99%

A Review of Similitude Methods for Structural Engineering

Casaburo

Petrone

Franco

et al. 2019

Applied Mechanics Reviews

120

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Similitude theory allows engineers, through a set of tools known as similitude methods, to establish the necessary conditions to design a scaled (up or down) model of a full-scale prototype structure. In recent years, to overcome the obstacles associated with full-scale testing, such as cost and setup, research on similitude methods has grown and their application has expanded into many branches of engineering. The aim of this paper is to provide as comprehensive a review as possible about similitude methods applied to structural engineering and their limitations due to size effects, rate sensitivity phenomena, etc. After a brief historical introduction and a more in-depth analysis of the main methods, the paper focuses on similitude applications classified, first, by test article, then by engineering fields.

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Section: Naval and Marinementioning

confidence: 99%

A Review of Similitude Methods for Structural Engineering

Casaburo

Petrone

Franco

et al. 2019

Applied Mechanics Reviews

120

View full text Add to dashboard Cite

show abstract

“…Therefore, this energy is also taken as a comparison during the rapid estimation of energy calculation in collision and grounding using a mathematical formula, such as proposed by a distinguished researcher. They are presented in the form of high-energy expression by Minorsky formula [30,31], developed low-energy form in Woisin equation [32][33][34] and validated formula in Zhang expressions [35][36][37]. Besides the internal energy, the kinetic energy is presented as part of the discussion.…”

Section: General Conditions On the Deck Structures After Impactmentioning

confidence: 99%

Crashworthiness characteristic of longitudinal deck structures against identified accidental action in marine environment: a study case of ship–bow collision

Prabowo

Bahatmaka

Sohn

2020

J Braz. Soc. Mech. Sci. Eng.

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Rising demand for transportation safety during their operation has become public awareness these days which leads to massive development in navigation and mitigation technologies. However, accidents for various transportation modes, including ship, are still occurring despite this progress. The numbers of involved parameters make accidental phenomena in the maritime environment, namely collision to be the latest concern as its influence on remarkable casualties. This paper aims to analyze ship collision incident which involves cargo carrier and passenger vessel. Structural crashworthiness as the main subject accounting for accidental limit state design and safety assessment is performed using a finite element approach to observe both global and local behaviors of the target ship under the bow impact. Initial prediction indicates that major collision energy is dedicated to destroying the main deck and outer shell. The tendency of the force during the collision period explicitly hints that progressive failure on the deck will continue to take place even if the accidental limit is extended. The behavior of the local member/component of the target ship is also to be presented in the discussion.

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“…Here, in the numerical modeling of the miniature ship grounding test with uniform shell elements with a / ratio of 8, strain rates in the range of 110-340 s -1 are observed in failing elements subjected mainly to tearing and stretching. When bringing this miniature experiment to real scale using similarity laws (scaling formulae detailed by Oshiro and Alves, 2009;Oshiro et al, 2017), this strain rate range corresponds to 1.1-3.4 s -1 . This range is compatible with that obtained from FE modeling of the grounding experiment but in real scale, which generates strain rates in failing elements in the range of 2.4 to 4.9 s -1 .…”

Section: Strain Ratementioning

confidence: 99%

Combined strain rate, mesh size and calibration test influence on structural failure: Miniature ship grounding test

et al. 2019

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This paper investigates the influence of the strain rate and element size on the fracture of steel plates presented in marine structures undergoing grounding when modeled by the finite element method. Three different experimental tests (tensile, tearing and perforation tests), performed at different velocities, are used in the study. These tests are conceived to cover diverse rupture modes related mainly to crack initiation and propagation. Plastic strain-and stress state-based failure criteria were calibrated from these experiments. Sensitivity to strain rate and mesh size were also evaluated. A ship grounding event was reproduced experimentally in 1:100 reduced scale. This experiment was FE modeled to evaluate the performance of the aforementioned failure criteria. The results verified the significant influence of the strain rate and stress state on the failure strain. In addition, it is shown that the sole use of tensile tests is not enough to properly characterize the material failure observed in the structural collapse mode of the miniature ship bottom structure. This collapse is shown to be a combination of stretching and tearing of structural members.

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Experimental study of collision in scaled naval structures

Cited by 33 publications

References 35 publications

A Review of Similitude Methods for Structural Engineering

A Review of Similitude Methods for Structural Engineering

Crashworthiness characteristic of longitudinal deck structures against identified accidental action in marine environment: a study case of ship–bow collision

Combined strain rate, mesh size and calibration test influence on structural failure: Miniature ship grounding test

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