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 10 of 10 for “"Interfacial fracture energy"”.
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Effects of Surface Microstructure on the Strength of Adhesively Bonded Structures
… on the influence of surface roughness on the fracture resistance of an aluminum-epoxy interface. A layered double cantilever beam (LDCB) specimen was chosen for this experiment. The LDCB specimen was debonded by peeling off the epoxy layer from the aluminum substrate using a steel wedge. …
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Quantitative evaluation of thin film adhesion using the probe test
… film epoxy polymer coated silicon system. The interfacial fracture energy (Gc) (or critical strain energy release rate) has been used as a quantitative measure of adhesion for the given adhesive coating/substrate system. The probe test experiments were conducted using an optical microscope and …
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Measurement of Interfacial Adhesion in Glass-Epoxy Systems Using the Indentation Method
… Experimental observations and measurements of interfacial adhesion in glass-epoxy systems are described in this thesis. A comparison study of how different glass treatments affect adhesion was also conducted: smooth versus rough, clean versus unclean, stressed versus non-stressed. The Oliver …
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Mechanical Characterization of Coating-Interconnect Interfaces and Anode-Electrolyte Interfaces for Solid Oxide Fuel Cells
… of the bend specimen are used to quantify the interfacial shear strength from a shear lag model. In addition, the onset strain of coating spallation is incorporated in an energy based fracture mechanics model to obtain the interfacial fracture energy. Images from scanning electron microscopy …
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Development of an enhanced microstructure–level machining model for carbon nanotube reinforced polymer composites using cohesive zone interface
… and the polymer phase, thereby assuming perfect interfacial bonding. However, subsequent experimental investigations revealed that the failure mechanism during machining is primarily governed by the CNT–polymer interface. Since the strength of the CNT–polymer interface is critical to the load …
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Surface characterization of plasma treated carbon fibers and adhesion to polyethersulfone
… method was used to determine the surface energy parameters y(ds) and I(psf) of the fibers. An XPS analysis of air and argon plasma treated fibers indicated a significant surface oxidation of the fibers which translated into low y(ds) values and high I(psf)values. An ammonia plasma was …
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Interfacial spallation/delamination properties of self-assembled monolayers
… affects (i) the spallation strength and (ii) the fracture toughness of the interface. The modeling work summarized in this thesis is motivated by previous results of molecular dynamic (MD) simulations and laser-induced spallation/delamination tests to quantify the strength and toughness of …
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Molecular tailoring of interfaces for thin film on substrate systems
… undergo thermo-mechanical cycling, which induces interfacial delaminations leading to failure of the overall device. The ability to tailor interfacial properties at the molecular level provides a mechanism to improve thin film adhesion, reliability and performance. This dissertation presents the …
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Determining Interfacial Adhesion Performance and Reliability for Microelectronics Applications Using a Wedge Test Method
Fracture mechanics is an effective approach for characterizing material resistance to interfacial failure and for making interface reliability predictions. Because interfacial bond integrity is a major concern for performance and reliability, the need to evaluate the fracture and delamination …
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Experimental and Numerical Investigations on the Durability and Fracture Mechanics of the Bonded Systems for Microelectronics Application
… was measured as a function of applied strain energy release rate, G, and temperature using a wedge test geometry. The specimens consist of two glass plates bonded with a thin layer of proprietary epoxy adhesive. The crack fronts along the epoxy/glass interfaces were measured using an optical …