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 “"Adhesive Bond"”.
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Estimation of Adhesive Bond Strength in Laminated Safety Glass Using Guided Mechanical Waves
… of S1 mode were also explored to estimate the adhesive bond strength between the plastic interlayer and the two adjacent glass plates. Results show that the combination of both the energy velocity and attenuation methods has promise towards replacing the pummel test method to estimate the …
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Development of a model to explain the effect of variable membrane compliance on single molecule adhesive bond force
The intermolecular bond force existing between adhesive membrane receptors and extracellular matrix (ECM) molecules is believed to regulate key cell functions, such as growth, apoptosis, motility, and mechanotransduction. From a clinical perspective, understanding the mechanics of cell-matrix bonds …
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Adhesion study of thermoplastic polyimides with Ti-6Al-4V alloy and PEEK-graphite composites
… with non-reactive phthalimide end-groups. The adhesive bond performance of these polyimides was investigated as a function of molecular weight, siloxane incorporation, residual solvent, test temperature, and polyimide structure via single lap shear samples prepared from treated Ti-6AI-4V alloy …
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I, Crystallization and morphological studies of ICI's intermediate temperature semicrystalline (ITX) polymer and, II, The influence of deformation (shear strain) during bond formation on adhesive bond strength
… dissertation topic discusses the effect of adhesive deformation during bond preparation on the mechanical performance of two commercial hot-melt adhesives, Dow DAF® 821 and Du Pont Surlyn® 1601. Lap shear bonds were sheared (// or ⟂ to load) during preparation to induce molecular orientation …
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Characterization of polyethylene terephthalate, cellulose acetate and their blends
… energy of a polymer is of great importance in adhesive studies. Acid/base specific interactions play pertinent roles in adhesive bond performance and polymer-polymer miscibility. In this study, the correlation between the surface characteristics of two polymers and their adhesive bond behavior …
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Environmental durability of FRP bond to concrete subjected to freeze-thaw action
… to determine the environmental durability of the adhesive bond between fiber-reinforced plastic (FRP) and concrete. The study specifically focused on freeze-thaw cycling exposure of such bonds and their ultimate strength prior and after the environmental exposure. To investigate the bond strength …
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Structural and residual strength analysis of metal-to-metal adhesively bonded joints.
… to assess the residual strength of defective adhesive bonds. This incorporates defect detection in adhesive bonds and quantification of the effect of these defects on the adhesive bond failure. Finite element analysis (FEA) was used to simulate the failure behaviour of adhesive bonds. Acoustic …
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Pole tip recession in linear tape systems
… stain formation mechanism had been identified. Adhesive bond formation is a chemical process that is governed by temperature. Thus the higher the contact pressure, the higher the contact temperature in the interface of head and tape, was produced higher the probability of adhesive bond formation …
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Study of a microcomposite metal-doped polyimide adhesive
… interfacial region, or interphase, between two bonded surfaces are of critical importance to the performance of an adhesive bond. This thesis describes a study in which a polyimide was modified by the addition of metal compounds in an effort to develop a graded interface between the adhesive and …
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The effect of residual thermal stresses on the viscoelastic behavior of adhesively bonded joints
Present stress analysis of adhesively bonded joints suffers from inadequate adhesive material characterization. The lack of correlation between bulk adhesive properties and the corresponding in-situ behavior has led to numerous adhesive test geometries. The current study was an attempt to predict …
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Mechanical Behavior of Adhesive joints Subjected To Thermal Cycling
… on the state of stress in polymeric materials bonded to stiff elastic substrates was investigated using numerical techniques, including finite element methods. The work explored the relationship between a cyclic temperature environment, temperature-dependent viscoelastic behavior of polymers, …
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Atomistic Characterization and Modeling of the Deformation and Failure Properties of Asphalt-Aggregate Interface
… by their common dependence on the nanoscale bonding and their sensitive dependences on mechanics and moisture sensitivity. Specifically, CVFF-aug forcefield is employed in the atomistic calculations to study the fundamental failure processes that appear at the interface as a result of a …
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The Development of Gelatin Based Tissue Adhesives for Use in Soft Tissue Biomedical Applications
… time, diffusion processes, material properties, adhesive properties, and the drying variables on the material and adhesive properties of Gelatin Resorcinol Dialdehyde (GR-DIAL) tissue adhesives by varying formulation. Three adhesive formulations with altered weight content of water and glyoxal (a …
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Promoting cellular adhesion to glass polyalkenoate cement by biopolymer addition
… and biaxial)], diametral fatigue strength and adhesive bond strength were determined prior to and following addition. <br/>The results indicated that in Libya root caries was more often on interproximal surfaces than in the UK. Gingival bleeding was a common clinical problem at restoration …
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Structure-Property Relationships and Adhesion in Polyimides of Varying Aliphatic Content
… It was possible to interpret the quantitative adhesive fracture energies along with the qualitative adhesion strength behaviors, the failure surface analyses, and to offer an understanding of the adhesive chemical structure-physical property relationships. These understandings provide a …
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Bonding Properties of Newly Erupted and Mature Human Premolars
… treatment. Since orthodontic attachments are bonded directly to the etched enamel using composite resin, post-eruptive enamel maturation may affect the bonding process. The purpose of this study was to determine whether there were differences in bond strength between mature and newly erupted …
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The fracture of epoxy resins and the effects of rubber inclusions
… examined both in 'bulk' and when used as a thin adhesive layer for bonding steel adherends. Values of fracture toughness, the type of crack growth and the resultant fracture surfaces have been studied over a wide range of temperatures, displacement rates and specimen thicknesses. Both systems …
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Finite Element Modeling of Macro Fiber Composite Actuators with Application to Wing De-icing
… Composite (MFC) actuators are used to break the adhesive bond between the leading edge of a wing and an accumulated ice layer. The concept for this technique relies on the fact that when a structure is excited at its natural frequencies, the shear stress generated is highest at certain modes. …
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Comparative Analysis of Inactivated Wood Surfaces
… inactivation results in reduced ability of an adhesive to properly wet, flow, penetrate, and cure. Thus, an inactivated wood surface does not bond well with adhesives. The changes in surface chemistry, wettability, and adhesion of inactivated wood surfaces, including heartwood of yellow-poplar …
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Organic Fillers in Phenol-Formaldehyde Wood Adhesives
… fillers impact the properties of the formulated adhesives and adhesive bond performance. The fillers studied in this work are derived from walnut shell (Juglans regia), alder bark (Alnus rubra), and corn cob (furfural production) residue. Alder bark and walnut shell exhibited chemical …
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