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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

A simplified photoelastic technique

Hoffer, Jerry 05 1900 (has links)
No description available.
2

Applying the complex representation of polarized light for three dimensional scattered light photoelastic stress analysis

Buban, John Phillip 08 1900 (has links)
No description available.
3

Investigation of the application of photoelastic analysis for the assessment of trans-tibial prosthetic socket/residual limb interfacial stresses

Sewell, Philip Jamie January 2003 (has links)
No description available.
4

Análise fotoelástica da distribuição de tensões em implantes dentais sob carga axial e não axial comparando-se implantes cônicos e cilíndricos e a topografia das roscas / Photoelastic analysis of stress distribution on dental implants under axial and non axial loads comparing cylindrical and conical implants and the thread topography

Rodrigues Cougo, Milton Cristian, 1985- 04 April 2014 (has links)
Orientador: Luciana Asprino / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-24T14:53:17Z (GMT). No. of bitstreams: 1 RodriguesCougo_MiltonCristian_M.pdf: 1951044 bytes, checksum: ba8e67a871a041bcbdcef11db00eea5e (MD5) Previous issue date: 2014 / Resumo: A perda óssea ao redor dos implantes dentários geralmente está associada à concentração das cargas mastigatórias na interface osso-implante e a propagação dessas tensões na crista do osso alveolar, acarretando uma diminuição na longevidade dos implantes. O objetivo deste estudo foi avaliar, comparativamente, in vitro, o efeito de diferentes desenhos do corpo e das roscas de implantes dentários, empregando a técnica experimental da fotoelasticidade. Para isto foram testados implantes Neodent® com interface protética Cone Morse, de 3,5mm de diâmetro e 13mm de comprimento, variando-se o desenho dos implantes e das roscas entre: corpo cônico com dupla rosca Alvim®, corpo cilíndrico e dupla rosca Titamax Ex® e corpo cônico com roscas duplas e progressivas Drive®. Realizou-se avaliação qualitativa da distribuição das tensões geradas por incidência de cargas axiais e não axiais de 0,5 Kg, assim como avaliação quantitativa da tensão nos terços cervicais, médios e apicais dos implantes, após incidência destas cargas. Os valores das médias de tensões cisalhantes máximas foram submetidos à análise de variância para dados com dois fatores de estudo (ANOVA 2-Way), seguidos pelo teste de Tukey para a comparação entre as médias. Com esta análise constatou-se que o grupo Alvim® apresentou maior concentração de tensões em relação aos outros grupos, comparando-se os pontos cervicais, quando submetido a carregamento axial obteve-se os valores médios de 16,05±5,75 Kgf e não axial de 25,03±4,16 Kgf, significativamente maiores que os outros grupos testados. Em relação aos pontos médio e apicais não houve uma diferença estatisticamente significante entre os grupos. Foi constatado que os implantes com corpo cônico e roscas duplas progressivas apresentam melhor distribuição das tensões / Abstract: Bone loss around dental implants is generally associated with concentration of masticatory loads on the implant-bone interface and the spread of such strains in the alveolar bone crest, resulting in a decrease in longevity of implants. The goal of this study is do an in vitro evaluation of the effect of different body designs and threaded of dental implants, using the experimental technique of photoelasticity. For this Neodent implants will be tested with Morse taper interface, diameter: 3.5 mm and length: 13 mm, varying the design of implants and implant threads: 1- tapered body with double thread Alvim ®; 2- cylindrical body and double thread Titamax Ex ®; 3- tapered body with progressive double threads Drive ®. Were conducted a qualitative evaluation of the stress distribution generated by incidence of non-axial and axial loads, as well as quantitative evaluation of tension in the cervical, middle and apical thirds of the implants after incidence of these charges. The average values of maximum shear stress were subjected to analysis of variance for data with two factors studied (2 - Way ANOVA) followed by Tukey test for comparison between means. With this analysis, the group Alvim ® showed statistically significant higher concentration of stresses than other groups, comparing cervical points. when subjected to axial loading was obtained the average values of 16.05 ± 5.75 Kgf and not axial 25.03 ± 4.16 kgf significantly higher than the other groups tested. Regarding the medium and apical points there was no statistically significant difference between the groups .Was found that the implants Drive® showed better stress distribution over the implants compared to implants of the other groups / Mestrado / Cirurgia e Traumatologia Buco-Maxilo-Faciais / Mestre em Clínica Odontológica
5

A photoelastic technique for the determination of stress intensity factors.

Jolles, Mitchell Ira, January 1976 (has links)
Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1976. / Also available via the Internet.
6

Photoelastic investigation of short beams

Carrolla, Ross R., January 1940 (has links) (PDF)
Thesis (M.S.)--University of Missouri, School of Mines and Metallurgy, 1940. / The entire thesis text is included in file. Typescript. Title from title screen of thesis/dissertation PDF file (viewed March 9, 2010) Includes bibliographical references (p. 60-61).
7

A photoelastic study of biaxial pillar stresses

Ortiz-Sanchez, Oswaldo, 1940- January 1969 (has links)
No description available.
8

The development of a photoelastic strain gauge to determine the principal strains directly

Garner, Edward Rogers, 1938- January 1965 (has links)
No description available.
9

Minimization of creep-time effects in photoelastic investigations

Parr, Charles Howard 05 1900 (has links)
No description available.
10

A scattered light photoelastic analysis of interlaminar matrix stresses in fibrous composite models

Aderholdt, Robert Wendell 12 1900 (has links)
No description available.

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