Optimization of composite ring stiffened cylindrical hulls for unmanned underwater vehicles using multi-island genetic algorithm

Song, Baowei; Lyu, Da; Jiang, Jun

doi:10.1177/0731684418760203

Cited by 24 publications

(11 citation statements)

References 19 publications

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“…Replacing this out-of-plane displacement in equation (8) and solving the differential equations, the Ariy F function is obtained and by inserting it into force relations (6), the forces are obtained. The obtained forces and the considered deflection are inserted into the Hooke's relationship (5) and the strains are obtained. Finally, by inserting these strains and uprising in relations (3), the in-plane displacements are calculated.…”

Section: Theory Of Sefs Methodsmentioning

confidence: 99%

“…In this work, the design variables considered were the alignment of the stiffeners and the thickness of the layers. Moreover, using Genetic algorithm, Song et al, 5 Chun and Guang, 6 Molavizadeh and Rezaei, 7 and Wei et al 8 studied the optimization of composite cylinders under hydrostatic pressure to delay the onset of buckling and failure. In another work, Almeida et al 9 studied the axial and torsional buckling response of carbon-epoxy filament wound-laminated drive shafts with different layups.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and numerical investigation of stiffener effects on buckling strength of composite laminates with circular cutout

Shojaee

Mohammadi

Madoliat

2019

Journal of Composite Materials

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In the notched structures, to achieve maximum buckling resistance in comparison with structural weight, the optimal design of a stiffener is very important. In this research, after a review of the existing literature, nonlinear buckling behavior of composite plates containing the cutout with three different designs of stringer was investigated. The considered stiffeners are planer, longitudinal, and ring types. The buckling experiments were carried out on the stiffened plates containing a circular notch. Moreover, to achieve an efficient prediction of the buckling in the stiffened laminate with the hole, a finite strip method is developed based on the Airy stress function and von Karman’s large deformation equations. Studies show that there is a good agreement between the postbuckling behaviors derived from developed finite strip method with experimental results. Fast convergence of the considered finite strip method compared with the finite element results shows its efficiency for prediction of buckling behavior in laminated composites. The results show that the buckling load-bearing capacities of perforated plates with a longitudinal and planer stiffener are higher compared with the other stiffener, respectively. The detailed parametric study on the effects of thickness of the plate and stiffener and opening diameter on buckling behavior was performed using experiments and modeling.

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Section: Theory Of Sefs Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of stiffener effects on buckling strength of composite laminates with circular cutout

Shojaee

Mohammadi

Madoliat

2019

Journal of Composite Materials

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“…Yazdani and Rahimi 11 experimentally studied the effect of the number of helical ribs and grid shapes on the buckling behavior of thinwalled glass fiber-reinforced polymer-stiffened cylindrical shells under axial loading. Song et al 12 optimized the composite ring-stiffened cylindrical hulls to resist static hydro pressures and reduce weight. Investigations by Bai et al 13 and Yu et al 14 for the reinforced thermoplastic pipe subjected to external pressure or other load combinations are also referable for the mechanical analysis of composite rubber hoses.…”

Section: Introductionmentioning

confidence: 99%

Analytical modeling for offshore composite rubber hose with spiral stiffeners under internal pressure

Gao

et al. 2020

Journal of Reinforced Plastics and Composites

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Internal pressure is the most important functional load for the offshore composite rubber hose. In this paper, the stress and radial displacement of the hose under internal pressure are investigated. The hose dimensions are length of 10.7 m and nominal bore diameter of 500 mm. The composite structure is mainly composed of cord-rubber reinforcement layers and a spiral steel stiffener. To calculate the stress and deformation of the hose, the stiffener and composite cord-rubber layers are theoretically analyzed based on the Euler–Bernoulli beam theory and the Donnell shell theory, respectively. The stiffener distinguishes the hose from common filament wound un-stiffened composite pipes in regard to the stress distribution and radial deformation. It is found that the stiffener plays an important role in affecting the mechanical behavior of composite reinforcement. Influences of the cord-winding angle, the stiffener spacing, and the stiffener’s tensile stiffness on the axial, hoop and shear stresses, and the radial displacement are investigated. The analytical model shows a good agreement with the finite element model. It is supposed to be of significant reference for practical engineering.

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“…Zhang et al [31] investigated the egg-shaped pressure hulls effect on enhancing the hydrodynamics of spherical pressure hulls, buckling resistance, and interior arrangements. On the other hand, Song et al [32] optimized a composite cylindrical hull to minimize the hull structural weight using multi island genetic algorithm. Also, Carpentieri and Skelton [33] designed a composite structure composed of composite membranes and cable networks to minimize the structural weight.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Sandwich Composite Deep Submarine Pressure Hull Considering Failure Criteria

Helal

Huang

Wang

et al. 2019

JMSE

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The pressure hull is the primary element of submarine, which withstands diving pressure and provides essential capacity for electronic systems and buoyancy. This study presents a numerical analysis and design optimization of sandwich composite deep submarine pressure hull using finite element modeling technique. This study aims to minimize buoyancy factor and maximize deck area and buckling strength factors. The collapse depth is taken as a base in the pressure hull design. The pressure hull has been analyzed using two composite materials, T700/Epoxy and B(4)5505/Epoxy, to form the upper and lower faces of the sandwich composite deep submarine pressure hull. The laminated control surface is optimized for the first ply failure index (FI) considering both Tsai–Wu and maximum stress failure criteria. The results obtained emphasize an important fact that the presence of core layer in sandwich composite pressure hull is not always more efficient. The use of sandwich in the design of composite deep submarine pressure hull at extreme depths is not a safe option. Additionally, the core thickness plays a minor role in the design of composite deep submarine pressure hull. The outcome of an optimization at extreme depths illustrates that the upper and lower faces become thicker and the core thickness becomes thinner. However, at shallow-to-moderate depths, it is recommended to use sandwich composite with a thick core to resist the shell buckling of composite submarine pressure hull.

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Optimization of composite ring stiffened cylindrical hulls for unmanned underwater vehicles using multi-island genetic algorithm

Cited by 24 publications

References 19 publications

Experimental and numerical investigation of stiffener effects on buckling strength of composite laminates with circular cutout

Experimental and numerical investigation of stiffener effects on buckling strength of composite laminates with circular cutout

Analytical modeling for offshore composite rubber hose with spiral stiffeners under internal pressure

Numerical Analysis of Sandwich Composite Deep Submarine Pressure Hull Considering Failure Criteria

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