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Design of optimal control surfaces for underwater vehicles
Title
Design of optimal control surfaces for underwater vehicles.
Creator
Jenkin, Alan Paul., Florida Atlantic University, Merry, Stephanie L.
Abstract/Description
This thesis presents a method for determining the optimal size and position of stabilizing fins and control surfaces for underwater vehicles. An interactive computer program predicts performance characteristics from calculated vehicle hydrodynamic coefficients. This program merges with a dynamic simulation that utilizes the characteristic coefficients of the design vehicle configuration. Example designs illustrate the procedure and general guidelines for the design of control surfaces....
Show moreThis thesis presents a method for determining the optimal size and position of stabilizing fins and control surfaces for underwater vehicles. An interactive computer program predicts performance characteristics from calculated vehicle hydrodynamic coefficients. This program merges with a dynamic simulation that utilizes the characteristic coefficients of the design vehicle configuration. Example designs illustrate the procedure and general guidelines for the design of control surfaces. Simulated steady state maneuvers illustrate the performance criteria and confirm the application of the design and simulation software package.
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Date Issued
1989
PURL
http://purl.flvc.org/fcla/dt/14533
Subject Headings
Submersibles--Design and construction
Format
Document (PDF)
Investigation of debonding failures in sandwich constructions
Title
Investigation of debonding failures in sandwich constructions.
Creator
Sendlein, Lyle Scott., Florida Atlantic University, Merry, Stephanie L., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description
Debonding failure of cored marine composite materials is investigated. A new test method that subjects the bond line between the core and the face sheets to a shear stress singularity is presented and studied analytically by laminated beam shear deformation theory, numerically by the finite element method, and experimentally with specimens of glass/polyester face sheets on balsa wood or PVC core sandwich beams.
Date Issued
1989
PURL
http://purl.flvc.org/fcla/dt/14519
Subject Headings
Mobile communication systems--Design, Wireless communication systems--Technological innovations, Cellular telephones--Design
Format
Document (PDF)
Study of edge effects in laminated sandwich specimens
Title
Study of edge effects in laminated sandwich specimens.
Creator
Mankuzhy, Pradeep Prabhakaran., Florida Atlantic University, Merry, Stephanie L., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description
Different methods have been employed to calculate the interlaminar stresses and to study the edge effect in a laminated sandwich specimens under uniaxial tension. However, Finite Element Analysis and Force Balance Method produced stress values which disagreed in both magnitude and sign, a controversy which exists in the case of composite laminates also. Experimental methods, photoelastic coating method and strain gaging, were attempted to obtain the strain distribution on the top surface of a...
Show moreDifferent methods have been employed to calculate the interlaminar stresses and to study the edge effect in a laminated sandwich specimens under uniaxial tension. However, Finite Element Analysis and Force Balance Method produced stress values which disagreed in both magnitude and sign, a controversy which exists in the case of composite laminates also. Experimental methods, photoelastic coating method and strain gaging, were attempted to obtain the strain distribution on the top surface of a sandwich specimen in three point bending. However, these conventional methods failed to show the sharp strain gradient that exists near the free edge. The Force Balance Method was simplified for sandwich specimens by considering the face laminate as a homogeneous and orthotropic material with averaged properties. Simplified expressions were also obtained for calculating the boundary layer thickness. The boundary layer thickness was found to vary linearly with core thickness for the cases considered.
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Date Issued
1989
PURL
http://purl.flvc.org/fcla/dt/14523
Subject Headings
Sandwich construction--Fatigue, Composite materials, Strains and stresses, Structural analysis (Engineering)
Format
Document (PDF)