Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 155 for “"thin-walled"”.
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Fracture of welded aluminum thin-walled structures
… thesis for damage prediction of welded aluminum thin-walled structures, which includes material modeling, calibration, numerical simulation and experimental verification. An extensive experimental program was conducted on large-scale welded panels used on Inter City Express (ICE) high-speed …
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Vibration Characteristics of Thin-Walled Noncircular Composite Cylinders
The lowest natural frequencies of thin-walled noncircular fiber-reinforced composite cylinders, specifically cylinders with elliptical cross sections, are investigated. Of interest is the variation of the lowest natural frequency, the so-called fundamental frequency, as a function of wall laminate …
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Structural Optimization of Thin Walled Tubular Structure for Crashworthiness
Crashworthiness design is gaining more importance in the automotive industry due to high competition and tight safety norms. Further there is a need for light weight structures in the automotive design. Structural optimization in last two decades have been widely explored to improve existing …
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Thin-walled composite deployable booms with tape-spring hinges
Deployable structures made from ultra-thin composite materials can be folded elastically and are able to self-deploy by releasing the stored strain energy. Their lightness, low cost due to smaller number of components, and friction insensitive behaviour are key attractions for space applications. …
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Chain link model for axially crushed thin-walled tubes
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 2003.
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Buckling of thin-walled cylinders from three dimensional nonlinear elasticity
… of the Flügge treatment of the buckling of a thin cylinder. The incremental equilibrium equations in terms of generalized stresses are rigorously derived in terms of mean quantities (holding true regardless of the thickness of the cylinder), through a generalization of the approach introduced …
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Static and Dynamic Response of Helically Curved Thin-Walled Girders
… static and dynamic response of helically curved thin-walled girders. The girder is assumed to possess a doubly symmetric, open cross-section with principal axes oriented in the directions of the normal and binormal vectors to the helical curve described by the cross-section center of gravity.
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Blast loading of sandwich panels with thin-walled tube cores
… sandwich panel under blast loading is presented. Thin-walled tubar members have been used extensively as energy absorbers under impact conditions. The progressive folding mechanism induced by axial crushing of the tubes allows for efficient dissipation of kinetic energy. The present study …
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Probabilistic Analysis of a Thin-walled Beam with a Crack
… response. The damaged wing is modeled by a thin-walled beam with a longitudinal crack the response of which can be obtained analytically. As uncertainties are present in the location and size of the crack as well as in the applied loads, their effects are incorporated into the framework …
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Intelligent control for the centreless grinding of compliant, thin walled cylinders
… numerically controlled grinding of compliant, thin walled cylinders. A study was made of previous developments in the adaptive control of grinding processes. Requirements imposed on the design of computer control systems by the implementation of adaptive control techniques were considered. A …
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The finite element analysis of thin-walled box spine-beam bridges
… the theoretical and experimental analysis of thin-walled box spine-beam bridges. Existing methods available for the analysis of spine-beam bridges have been reviewed, with special attention being paid to thin-walled box beam theories. A new approach combining the finite element technique and …
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Crash behavior of three dimensional thin-walled structures under combined loading
… a thorough understanding of crushing behavior of thin-walled structural members such as spot-welded sheet metal beams or extruded aluminum beams must be gained. In the present thesis, the complex crushing process of three-dimensional thin-walled structures subject to combined loading is solved …
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Plastic resistance of thin-walled prismatic tubes under large twisting rotations
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2000.
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Elastic buckling solutions for thin-walled metal columns with perforation patterns
Presented are approximate finite strip methods for use in predicting elastic buckling strength of cold-formed steel columns. These methods were developed by examining elemental behavior of cross-sections in eigen-buckling analyses and validated using a large database of finite element rack-type …
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Damage Detection Methodologies For Structural Health Monitoring of Thin-Walled Pressure Vessels
There is a need in exploring structural health monitoring technologies for the composite structures particularly aged Composite Overwrapped Pressure Vessels (COPVs) for the current and future implementation of COPVs for space missions. In this study, the research was conducted in collaboration with …
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Dynamic response of thin-walled composite structures with application to aircraft wings
… and then the dynamic characteristics of thin-walled composite structures with the presence of bending torsion coupling. The dynamic response theory incorporates the dynamic stiffness matrix approach and generalised coordinates using the normal mode method. Structural components considered …
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