Composite Pressure Hulls for Autonomous Underwater Vehicles

Osse, T.J.; Lee, T.J.

doi:10.1109/oceans.2007.4449124

Cited by 13 publications

(15 citation statements)

References 21 publications

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“…According to [11], in 1989 a research project attempted to manufacture high-pressure hulls with an outside diameter of 20cm. The project cooperated with five companies to manufacture a total of 23 hulls using both filament winding and hand layup of 6 types of fibers and 9 types of resins and all 23 of the prototypes produced failed prematurely.…”

Section: Conceptual Designmentioning

confidence: 99%

Design and Testing of a Composite Pressure Hull for Deep Autonomous Underwater Vehicles

Elkolali

Alcocer

2022

IEEE Access

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This paper presents the design and testing process of the hull of a deep small autonomous underwater vehicle, rated at 2000m depth. Starting from setting the geometrical constraints for the design to mass production. None of the previous literature, to the authors' knowledge has presented similar work. Carbon Fiber Reinforced Epoxy material was chosen given their high strength to weight ratio and similarity of its compressibility to sea water. Material characterization was performed to obtain the material properties under loading conditions using a modified method of the Combined Loading Compression testing technique. A specific fixture was designed and manufactured to test filament-wound tubes. An analytical model was developed on MATLAB, a finite element model was created on ABAQUS, and the results of both models were compared. Then a quality control set of tests was performed including seawater absorption under high pressure and void analysis using destructive and non-destructive tests. Pilot samples were manufactured and tested in a pressure vessel, where one was cycle tested and inspected using visual and ultrasonic testing, and the other one was fail tested where it failed at ~93% of the expected load.

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Section: Conceptual Designmentioning

confidence: 99%

Design and Testing of a Composite Pressure Hull for Deep Autonomous Underwater Vehicles

Elkolali

Alcocer

2022

IEEE Access

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“…This sleeve can control the rate of radial and circumferential deflection in the transition region near the endcap. 37 It is assumed that the end of the cylindrical shell had a freedom to move in the axial direction. This can be achieved by the following boundary conditions …”

Section: Solution Proceduresmentioning

confidence: 99%

Optimizing the buckling strength of filament winding composite cylinders under hydrostatic pressure

Chun

Pan

2018

Journal of Reinforced Plastics and Composites

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This paper presents the design optimization of filament winding composite cylindrical shell under hydrostatic pressure to maximize the critical buckling pressure. To this end, an optimization framework has been developed by employing numerical solution integrated with genetic algorithm. The design variables are fiber orientation and the corresponding number of layers. The framework is used to find the optimal design of filament winding composite cylindrical shell subjected to hydrostatic pressure. Three types of winding pattern are investigated, and the maximum critical buckling loads are increased by 26.14%, 25.82% and 20.95% compared with the base line, respectively. The influences of design variables on the critical buckling pressure are investigated. Results show that filament winding angles have more significant effect on the critical buckling pressure than the corresponding number of layers. Comparative study is carried out to verify the efficiency and accuracy of the optimization framework. Compared with the finite element analysis, the optimization framework has significant advantages in terms of calculation efficiency.

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“…Laminated composite cylindrical pressure hulls have been experimentally tested for the development of pressure hull for the Deepglider [12]. The actual dimensions of the cylindrical pressure hull have been adopted from the same.…”

Section: B Analysis Of Cylindrical Pressure Hullmentioning

confidence: 99%

“…The aluminum pressure hull for Slocum glider in early nineties has been replaced by the novel engineered laminated composite pressure hull for Deepglider [12] in the twenty first centuary. The structure of almost all the recently developed AUG is formed of laminated composites that are complex material systems, the analysis of which is highly complicated and demands the effective prediction of responses of the AUG. A novel finite element [13] formulated especially for the analysis of underwater thin shell structures is employed for the prediction of responses of the components of AUG.…”

Section: Introductionmentioning

confidence: 99%

Structural responses of laminated composite underwater gliders

Smitha

Nandakumar

2015

2015 IEEE Underwater Technology (UT)

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Oceans of earth consists of vast unidentified resources that when explored could be made available for the health and welfare of human being. Oceanographic explorations have taken a positive turn in recent years due to the developments in the robotics and structure of autonomous underwater vehicles. The underwater vehicles with projecting wings and that utilize the energy of buoyant force to move through water called by the name underwater gliders is an advancement in the category of undersea vehicles. Emergence of innovative, advanced laminated composites channeled the progress towards lightweight, self-sufficient tiny subsea gliders. The inherent properties of laminated composites prove it to be an ideal material for engineering the structural and nonstructural components of undersea gliders. The external components of these are acted upon by hydrostatic pressure and the laminated nature of the material used creates complex stress states which necessitate intricate and meticulous structural analysis procedures to predict the responses accurately. This paper presents the finite element analysis of laminated composite shallow shell panels which appear as wings of subsea gliders and cylindrical shells that come as pressure hulls of selfgoverning submerged gliders using a newly formulated composite finite element.

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Composite Pressure Hulls for Autonomous Underwater Vehicles

Cited by 13 publications

References 21 publications

Design and Testing of a Composite Pressure Hull for Deep Autonomous Underwater Vehicles

Design and Testing of a Composite Pressure Hull for Deep Autonomous Underwater Vehicles

Optimizing the buckling strength of filament winding composite cylinders under hydrostatic pressure

Structural responses of laminated composite underwater gliders

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