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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.
41

Bio-based composite sandwich panel for residential construction

Hu, Bo. January 2006 (has links)
Thesis (Ph.D.)--University of Delaware, 2006. / Principal faculty advisor: Harry W. Shenton, Dept. of Civil & Environmental Engineering. Includes bibliographical references.
42

Design of composite sandwich panels for lightweight applications in heavy vehicle systems

Evans, Thomas H. January 2006 (has links)
Thesis (M.S.)--West Virginia University, 2006. / Title from document title page. Document formatted into pages; contains ix, 125 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 124-125).
43

Response of Laser Welded Sandwich Panels Subject to Initial Velocity

Baskiyar, Rajeev January 2007 (has links) (PDF)
No description available.
44

Analysis and Testing of Laser Welded Steel Sandwich Panels

Yorulmaz, Serdar January 2008 (has links) (PDF)
No description available.
45

Impact on panels of sandwich construction

Rollins, Mark Andrew January 1990 (has links)
No description available.
46

Finite element analysis of a composite sandwich beam subjected to a four point bend

Hove, Darlington January 2011 (has links)
The work in this dissertation deals with the global structural response and local damage effects of a simply supported natural fibre composite sandwich beam subjected to a four-point bend. For the global structural response, we are investigating the flexural behaviour of the composite sandwich beam. We begin by using the principle of virtual work to derive the linear and nonlinear Timoshenko beam theory. Based on these theories, we then proceed to develop the respective finite element models and then implement the numerical algorithm in MATLAB. Comparing the numerical results with experimental results from the CSIR, the numerical model correctly and qualitatively recovers the underlying mechanics with some noted deviances which are explained at the end. The local damage effect of interest is delamination and we begin by reviewing delamination theory with more emphasis on the cohesive zone model. The cohesive zone model relates the traction at the interface to the relative displacement of the interface thereby creating a material model of the interface. We then carry out a cohesive zone model delamination case study in MSC.Marc and MSC.Mentat software packages. The delamination modelling is carried out purely as a numerical study as there are no experimental results to validate the numerical results.
47

Analysis of fillet function in wood-based sandwich construction

Kaneko, Tatsuhei January 1972 (has links)
When a porous honeycomb core is glued to plane facings to make a sandwich construction, glue fillets (concave menisci) are formed around the core cell edges. It is known that glue fillets play an important role in strengthening the bond of the construction, but only few studies on the real function of the fillet have been reported. This thesis investigates the relationships between fillet size and bonding strength in sandwich construction followed by a stress analysis of the fillets. Sandwich panels with various fillet sizes were produced by means of a glue applicator of original design using a modified phenol-resorcinol resin glue, kraft paper honeycomb cores and Douglas fir plywood facings. Tensile strength tests normal to the sandwich specimens of 1 by 1 inch, and flexure tests on the sandwich beams of 3.75 by 12 inches were performed. Fillet rupture sizes and actual fillet dimensions were measured. A highly significant correlation was found between fillet size and bonding strength. Larger fillets provided greater bonding strength. When a sandwich was subjected to tensile load, a vertical shear failure took place at the center of the fillet concave meniscus regardless of fillet size. By assuming the uniformity of fillet shape, the following equation: [symbol omitted]= my + d , was found to express the relationship between the vertical shear stress [symbol omitted] at the fracture point B and the fillet height y at B, where m and d were constants. Too large fillets had tendency to form voids or bubbles within them resulting in lowering strength values. The appearance of fracture in the glueline in flexure test specimens was similar to that in the tensile test. Most of the sandwich specimens with smaller fillets failed in the glueline, while those with larger fillets mostly failed in core shear. This observation also indicated the superiority of larger fillets in bonding of honeycomb-to-plywood. The cause of glueline failure in the flexure test was deemed to result from a complex system of shear, compression and tensile stresses. However, a mathematical expression describing that system of stresses was not found. / Forestry, Faculty of / Graduate
48

Inelastic buckling of sandwich plates

Wong, Yim-Hung Harry. January 1981 (has links)
No description available.
49

Elastic Properties of Sandwich Composite Panels Using 3-D Digital Image Correlation with the Hydromat Test System

Melrose, Paul Thomas January 2004 (has links) (PDF)
No description available.
50

Lightweight composites for modular panelized construction

Vaidya, Amol S. January 2009 (has links) (PDF)
Thesis (Ph. D.)--University of Alabama at Birmingham, 2009. / Title from PDF title page (viewed Feb. 8, 2010). Additional advisors: Uday Vaidya, Talat Salama, Wilbur Hitchcock, Ashraf Z. Al-Hamdan. Includes bibliographical references (p. 144-155).

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