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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.
141

Explorations in the application of nanotechnology to improve the mechanical properties of composite materials /

Yang, Cheng. January 2007 (has links)
Thesis (Ph.D.)--Hong Kong University of Science and Technology, 2007. / Includes bibliographical references (leaves 146-161). Also available in electronic version.
142

A finite element cure model and cure cycle optimization for composite structures /

Somanath, Nagendra, January 1987 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1987. / Vita. Abstract. Includes bibliographical references (leaves 175-179). Also available via the Internet.
143

Progress and challenges in non-linear constitutive modeling for composite materials

Booth, Eric Jason. January 2007 (has links) (PDF)
Professional paper (M.S.)--Montana State University--Bozeman, 2007. / Typescript. Chairperson, Graduate Committee: Douglas S. Cairns. Includes bibliographical references (leaf 22).
144

Sheet forming of woven textile composite preforms : formability and wrinkling /

Zhu, Bo. January 2007 (has links)
Thesis (Ph.D.)--Hong Kong University of Science and Technology, 2007. / Includes bibliographical references. Also available in electronic version.
145

Finite element analysis of propagating interface cracks in composites /

Aminpour, Mohammad Ali. January 1986 (has links)
Thesis (Ph. D.)--University of Washington, 1986. / Vita. Bibliography: leaves [104]-109.
146

Microstuctural Changes in Wood-Plastic Composites (WPC) Due to Extended Moisture Cycling and its Relationship to Mechanical Performance Changes

Cheng, Qingzheng January 2005 (has links) (PDF)
No description available.
147

Characterization of Wood Resin-Adhesive Spray

Zhang, Xuelian January 2008 (has links) (PDF)
No description available.
148

Analysis and Structural Health Monitoring of Composite Plates with Piezoelectric Sensors and Actuators

Mewer, Richard C. January 2003 (has links) (PDF)
No description available.
149

New application of crystalline cellulose in rubber composites /

Bai, Wen. January 1900 (has links)
Thesis (PH. D.)--Oregon State University, 2010. / Printout. Includes bibliographical references (leaves 173-184). Also available on the World Wide Web.
150

Compósito estrutural carbono/epóxi via RTM para aplicação aeronáutica: processamento e caracterização

Brocks, Thatiane [UNESP] 08 July 2011 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:27:12Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-07-08Bitstream added on 2014-06-13T19:47:37Z : No. of bitstreams: 1 brocks_t_me_guara.pdf: 1127902 bytes, checksum: d3d7631f1ee3c081efb6530997375ebd (MD5) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / A indústria aeronáutica nacional tem intensificado sua busca por materiais alternativos, com características e propriedades que permitam a substituição segura do material metálico. Com o objetivo de ganhar competitividade no mercado internacional e contribuir para o desenvolvimento tecnológico no país, o presente trabalho apresenta a técnica de processamento de moldagem por transferência de resina (RTM), utilizada na fabricação de materiais compósitos estruturais e ainda pouco estudada no Brasil. Os compósitos processados por essa técnica apresentam maior fração volumétrica de fibras, melhor acabamento superficial e pouca ou nenhuma necessidade de acabamento do componente produzido. Este trabalho compreende o processamento e a caracterização de compósitos produzidos com resina epóxi monocomponente Cycom 890 e dois tipos de tecidos, plain weave e twill 2x2, ambos de fibra de carbono. Para a determinação dos parâmetros de processamento, a resina foi caracterizada quanto aos seus comportamentos térmico e viscoso. Com base nos resultados e testes preliminares foi determinada a temperatura mais adequada de injeção em 100°C, a pressão de injeção entre 0,2 e 0,4 MPa e de vácuo em 250 mPa.s. Os compósitos produzidos foram analisados pela técnica de ultrassom C-Scan e os resultados mostraram que os laminados processados estão homogêneos quanto à impregnação. Testes de tração mostram que os laminados com tecido tipo Twill apresentam maior média de resistência à tração, enquanto que a diferença de trama não influencia significativamente às propriedades de flexão e cisalhamento, que se mostraram superiores as propriedades de compósitos produzidos em autoclave com maiores porcentagens de reforço. Em fadiga, ambos os laminados apresentaram um curto intervalo, com tensões próximas à de tração, no entanto, o laminado PW/Cycom apresentou maior... / The national aeronautical industry has intensified your search for alternative materials, with characteristics and properties that allow the safety replacement of metallic material. The goal is to gain competitiveness on international market and contribute with technological development in the country. This work presents a processing technique of resin transfer molding (RTM), used on manufacture of structural composites and understudied in Brazil. Composites processed by this method have a higher fibers volume fraction, better surface finish and little or no finishing require of produced component. This work includes the processing and characterization of composites made with monocomponent epoxy resin Cycon 890 and two types of carbon fiber fabrics, plain weave and twill 2x2. To determine processing parameters, the resin was characterized regarding thermal behavior and viscosity. Based on this results and preliminary tests, it was determined the most appropiate injection temperature at 100°C, the injection pressure between 0.2 and 0.4 MPa and vacuum pressure in 250 mPa.s. Composites produced were analyzed by C-scan ultrasound technique showing a homogeneous impregnation of processed panels. Tensile and flexural tests characterized mechanically composites, allowing seeing that Twill fabric has higher medium tensile performance, while the difference of weft does not influence significantly the flexural and shear properties, that are superior than properties of composites made by autoclaving with higher reinforced volume. In fatigue, both composites showed short interval, close to ultimate tensile strength (uts), however, the PW/Cycom laminated showed higher fatigue resistance, with an interval between 85-92% of uts. About the thermal behavior, it was observed an improvement in properties with the addition of carbon... (Complete abstract click electronic access below)

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