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 29 for “"photoelasticity"”.
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Three-dimensional photoelasticity problems
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Mechanical Engineering, 1945.
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Digital photoelasticity in biomedical sensing.
This research investigates on the use of digital photoelasticityin biomedical sensing applications with a particular emphasis on assessment of diabetic foot ulceration. One of the main causes of foot ulceration in diabetic patients is excessive pressure at the sole of the foot, which involves …
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A Laser Light Source in Dynamic Photoelasticity
Made available in DSpace on 2014-12-10T17:25:32Z (GMT). No. of bitstreams: 1 6507144.pdf: 3401165 bytes, checksum: 9f44875340aa053f506f3e00d5d6e4aa (MD5) Previous issue date: 1965
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A Hybrid Camera System for Dynamic Photoelasticity and Holography
Made available in DSpace on 2014-12-14T14:42:09Z (GMT). No. of bitstreams: 1 7524418.pdf: 3233908 bytes, checksum: 4eb025547f122509838a9fc860d35197 (MD5) Previous issue date: 1975
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Shock front loading techniques for studies in dynamic photoelasticity
… well-defined dynamic load for studies in dynamic photoelasticity. A brief review is given of the techniques that have been used, and the scope of research projects that have been undertaken in dynamic photoelasticity by other investigators. The theory related to shock front loading of models is …
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An Application of Scattered Light Photoelasticity to Dynamic Stress Analysis
Made available in DSpace on 2014-12-10T17:25:39Z (GMT). No. of bitstreams: 1 6711863.pdf: 1782661 bytes, checksum: 45f956d1b7b99f7ccf6cd80f8647b2da (MD5) Previous issue date: 1967
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Experimental determination of the stress singularity exponent in cracked bodies using photoelasticity
… the singularity exponent. Stress freezing photoelasticity is employed to generate experimental data from nearly incompressible, elastic material. The technique of optical fringe multiplication is utilized to collect data from thin, closely spaced photoelastic slices. A new quasi-linear …
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A Sequentially Modulated Ruby Laser System for Transmitted and Scattered Light Dynamic Photoelasticity
Made available in DSpace on 2014-12-10T17:25:42Z (GMT). No. of bitstreams: 1 6808208.pdf: 3987782 bytes, checksum: b1b2dca733b57d2d43829cf85d16c453 (MD5) Previous issue date: 1967
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On Infrared Grey -Field Photoelasticity and Applications for Defect Detection in Bonded Semiconductor Devices
*This dissertation is a compound document (contains both a paper copy and a CD as part of the dissertation). The CD requires the following system requirements: Micrsoft Office; Windows MediaPlayer or RealPlayer.
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Simultaneous Determination of the Isopachic and Isochromatic Fringe Patterns for Dynamic Loadings by Holographic Photoelasticity
Made available in DSpace on 2014-12-12T00:25:47Z (GMT). No. of bitstreams: 1 7212215.pdf: 3452587 bytes, checksum: f1d88acee24b6ea3280fdd835e59708d (MD5) Previous issue date: 1971
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Determination of stress concentration factors using experimental methods
… brittle coating, brittle specimen failure, photoelasticity, and Moire interferometry. Results are compared to each other and to finite element analysis performed on the same geometry. Strain gaging and photoelasticity were chosen as the best methods for stress concentration factor …
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Structural-model experiments revealing bifurcation, instability and localization
… occurring in structures and within materials. Photoelasticity is employed to analyze the localization of stress in ordered granular materials and near stiff and thin inclusions embedded in an elastic matrix. Prototypes have been designed and realized of elastic structures evidencing buckling …
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Some Aspects of the Mechanics and Mechanisms of Dynamic Brittle Fracture
… used in the method of caustics, and in dynamic photoelasticity.
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Experimental determination of stress intensities and crack shapes associated with the nozzle corner crack problem
The method of stress freezing photoelasticity has been applied to a phase of the nozzle corner crack problem yielding results in the form of crack shapes and stress intensity factor distributions. Results of the current study are compared with alternate methods and different phases of the same …
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Applications of the Optical Method of Caustics to the Study of Viscoelastic Dynamic Fracture and Static Blunt Crack Fronts
… relation, as used in the optical methods of photoelasticity and caustics, are extended to linearly viscoelastic materials. The Maxwell-Neumann relation for the stress-optic constants, which is good for linearly elastic behavior, is replaced by an expression derived from the …
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Characterization of residual stresses in birefringent materials applied to multicrystalline silicon wafers
… material in its own right, and the use of photoelasticity to determine stresses at linear and planar defects can have important consequences in the electrical performance of devices such as electronics and photovoltaic cells. This thesis presents the results of an experimental investigation …
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Stress study in faulted tunnel models by combined photoelastic measurements and finite element analysis
… two of the three tunnels, at an inclined angle; Photoelasticity and Finite Element method, are used in this investigation. The Photoelastic measurements are performed by using a plexiglass plane model. Concurrent simulations of the same plexiglass model are performed by the Finite Element …
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Investigations into deep cracks in rocket motor propellant models
… cutout cylinders. Using three-dimensional photoelasticity and proper algorithms in fracture mechanics, the stress intensity factors (SIF's) and the stress singularity orders along the crack front have been calculated. A surface effect on the dominant singularity order is observed and some …
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Local Displacements and Load Transfer of Shape Memory Alloys in Polymeric Matrices
… matrix was quantified using two-dimensional photoelasticity. The effects of residual stress were examined using high temperature cured matrices. In-plane displacements of room temperature cured SMA ribbon composites were obtained using moire interferometry. Displacements due to thermal …
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A study of near tip phenomena for cracks in a particulate composite
… the available algorithms and three dimensional photoelasticity, the dominant stress singularity order values were calculated in a four point single edged cracked bend specimen with both straight front and thumbnailed cracks. The free surface values are the same as for the inert propellant and in …
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