Dynamic lateral mass impact on steel stringer-stiffened cylinders

Thang, Quang; Muttaqie, Teguh; Shin, Hyun Kyoung; Cho, Sang-Rai

doi:10.1016/j.ijimpeng.2018.02.007

Cited by 30 publications

(17 citation statements)

References 17 publications

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“…2. In collision analysis, the material properties were applied using the revised 119 equations reported in reference Do et al [13]. These equations were developed using 120 the rigorous dynamic tensile test results on different steels.…”

Section: Case Studiesmentioning

confidence: 99%

“…However, the residual strength of dented stiffened cylinders is investigated relatively in few studies and there is a limited database of experiments by Ronalds and Dowling [9], Harding and Onoufriou [10]; Walker et al [11,12]. Additionally, Do et al [13] conducted the dynamic mass impact tests on two stringer-stiffened cylinders (denoted as SS-C-1 and SS-C-2) with local impact at mid-span. These models were then performed under hydrostatic pressure for assessing the residual strength of these structures after collision [14].…”

Section: Introductionmentioning

confidence: 99%

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Numerical studies on residual strength of dented tension leg platforms under compressive load

Thang

Huynh

Tran

2020

STCE

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This paper focuses on numerical investigations and derived formulation to evaluate the residual strength of tension leg platforms (TLPs) with the local denting damage under axial compression loading. The damage generation scenarios in this research are represented the collision accidents of offshore stiffened cylinders TLPs with supply ships or floating subjects. The finite element model is performed using a commercial software package ABAQUS, which has been validated against the experiments from the authors and other researchers. Case studies are then performed on design examples of LTPs when considering both intact and damaged conditions. Based on the rigorous numerical results, the new simple design formulations to predict residual strength of dented TLPs are derived through a regression study as the function of a non-dimensional dent depth. The accuracy and reliability of the derived formulation are validated by comparing it with the available test results in the literature. A good agreement with existing test data for ship-offshore structure collisions is achieved. Keywords: dented stringer-stiffened cylinder; residual strength; tension leg platforms (LTPs); axial compression; residual strength formulation.

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Section: Case Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical studies on residual strength of dented tension leg platforms under compressive load

Thang

Huynh

Tran

2020

STCE

Self Cite

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“…For the deep doubly curved shell, Naghsh et al [7] carried out a free vibration analysis of a typical shell of revolution. When the material of the shell is steel, Do et al [8] performed the impact response of large-diameter thin-walled steel truss stiffened cylinders under the low-speed mass impact. Besides, they also considered the damage to the stringer-stiffened cylinders under external hydrostatic pressure [9].…”

Section: Introductionmentioning

confidence: 99%

“…Continuing with this method, we find that for any 1+ is a periodic function. That is to say, the trajectories of system (8) near ( ) 0,0 are all periodic orbits, thus ( ) 0,0 is also the center of system(8) and it is a stable equilibrium state. Therefore, the approximate periodic solutions of system (6) around the origin can be determined by…”

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confidence: 99%

Stability and Approximate Analytical Periodic Solution of a Structurally Orthotropic Stringer Shell

Liu¹,

Wang²,

Gao³

2020

JAMP

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Combined with real engineering, we mainly study the stability of the equilibrium state at the coordinate center of an orthotropic stringer shell system, and the approximate analytic periodic motion is presented around the studied equilibrium state. In addition the rationality of the obtained results is verified by numerical simulation. Furthermore we found that there are actually only four kinds of phase portrait of this type of shell.

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“…Cho (2014) and Dac et al (2017) investigated repeatedly impacted steel beams and concluded that the incremental permanent deformations decreased with the increase in the number of impacts. Cesim et al (2015) conducted tests on glass/epoxy composites under repeated impacts, Onur et al (2017) on repaired honeycomb sandwich structures, and Quang et al (2018) on large-diameter, thin-walled stringer-stiffened steel 4 cylinders. In order to assess the load-capacity of ship side structures or bottom, a large number of experiments, analytical methods and finite element simulations have been conducted (Paik 2007a;Paik 2007b;Paik and Won2007;Haris and Amdahl 2012;Storheim and Amdahl 2017;He 2016;Liu 2017).…”

Section: Introductionmentioning

confidence: 99%

Dynamic behaviour of aluminium alloy plates with surface cracks subjected to repeated impacts

Duan

Liu

Wang³

et al. 2018

Ships and Offshore Structures

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Highlights The dynamic response of aluminum alloy plates repeatedly impacted by a rigid impactor has been investigated experimentally and theoretically. The permanent deformations of an impacted plate increase with each additional impact, and reach the largest values when the surface crack reaches the other side of the plate. The load-carrying capacity of a plate with a surface crack is sensitive to the crack length especially when the crack is shorter than the impactor diameter. The load-carrying capacity of a plate with a surface crack is also sensitive to the depth of the surface crack.  Within the scope of the test program, the surface cracks had rather moderate influences on the permanent deformations. The analytical formulae of Jones was modified with the stresses determined based on the true stresses. Discussions were also given to some assumptions in this refined analytical formula. AbstractThis paper investigates the behavior of aluminum plates with and without initial cracks under repeated impacts. Three series of repeated impact tests were conducted to study the behaviors of circulate plates that do not have any cracks (series B), have surface cracks with varying length (series L), and have cracks varying depths (series D). A hammer was dropped from the same height with a constant initial striking energy 60J for all tests. For each test specimen, the hammer was dropped nine times to simulate the scenario of repeated impacts. It was observed that plates with larger cracks carried smaller impact forces and assumed larger deformations. When the crack length was larger than the diameter of impactor, the responses of aluminum alloy plates became less sensitive to the crack length. With the increase in impact number, the effects of crack lengths and depths on dynamic behavior of aluminum alloy plates became much more significant. Predictions using a rigid-plastic theoretical model were compared with these test results, and discussions were given to the assumptions of this theoretical model. With the stresses determined based on the true strain-stress curve obtained by standard tension test, the refined analytical formula provides better predictions that agree well with the lab tests.

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Dynamic lateral mass impact on steel stringer-stiffened cylinders

Cited by 30 publications

References 17 publications

Numerical studies on residual strength of dented tension leg platforms under compressive load

Numerical studies on residual strength of dented tension leg platforms under compressive load

Stability and Approximate Analytical Periodic Solution of a Structurally Orthotropic Stringer Shell

Dynamic behaviour of aluminium alloy plates with surface cracks subjected to repeated impacts

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