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 51 for “"Strength and Modulus"”.
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Effect of interweaving on the axial compressive strength and modulus of filament-wound composite cylinders
… Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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Rolling Shear Strength and Modulus for Various Southeastern US Wood Species using the Two-Plate Shear Test
… orthogonal layers. Compared to Canada and Europe, CLT is a novel product to the US. With the additions included in the 2021 International Building Code (IBC), CLT material properties, especially rolling shear, would need to be explored. The increasing demand for softwood lumber, along …
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The Development of the Strength Index Method and Protocol for Assessing the Use of Solid Waste Materials in Concrete
… sludge ash generally exhibited less compressive strength and modulus of elasticity when compared to concrete containing 100% portland cement (control) at all test ages. The stress-strain relationship for the BP and CR concretes were not as stiff as the control concrete but DU and LM concretes …
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Structure-property characterisation of ternary phase polypropylene composites
… to study factors controlling the structure and properties of binary- and ternary-phase polypropylene (PP) composites containing ethylene-propylene rubber (EPR) and glass beads has been carried out. The composite structure was evaluated using various techniques including SEM, DSC, XRD and …
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Polymer Composite Spinal Disc Implants
… results for vertebral endplate connection and nucleus pulposus internal pressure, for the correction of disc degeneration in the spine. The three-part composite samples needed to demonstrate good shock absorption and load distribution while maintaining strength and flexibility, and removing …
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Generation of Thermotropic Liquid Crystalline Polymer (TLCP)-Thermoplastic Composite Filaments and Their Processing in Fused Filament Fabrication (FFF)
… mechanical properties. Traditionally, carbon and glass fibers are widely used to improve the physical properties of polymeric matrices. However, the blending methods lead to fiber breakage, preventing generation of long fiber reinforced filaments essential for printing load-bearing components. …
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Practical limitations of single-span ultra-high performance concrete beams
… materials has allowed designers to build lighter and stronger structures, and in some cases has allowed the construction of concrete members that do not require reinforcement. However, as designers consider integrating and adapting these high performance materials into their structures, they …
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Using Maturity to Predict Girder Camber
… at prestress transfer was used to calculate modulus of elasticity for predicting camber at release. The research consists of a literature review of maturity methods, testing of a standard concrete mix to determine strength and modulus functions and measurement of girder camber and maturity. …
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Development of High-Strength Composites with Sustainable Fibers for Structural Applications
… Various chemical treatments (NaOH, silane, and maleic anhydride (MA)) were applied to improve fiber compatibility with polylactic acid (PLA). Both untreated and treated fibers at 10% loading were blended with PLA and extruded into 3D printable filaments. Results showed that MA-treated …
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Evaluation of mechanical properties of textile concrete subjected to different environmental exposures
… so called "Textile Concrete" (TC). Although the strength and modulus of PP are not very high, careful design through the appropriate placement and high fibre volume fraction of a textile format, has led to sufficient strength and stiffness, while at the same time high toughness has been achieved. …
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Spray deposition of cork reinforced polyester
… reinforced polyester. The low initial investment and high flexibility of the spray lay-up process make it an attractive candidate to study. A spray lay-up apparatus was successfully constructed and employed in manufacturing parts from a hybrid material composed of granulated cork, chopped glass …
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Processing and properties of composites based on high density polyethylene and thermotropic liquid crystalline polymers
This research was concerned with the processing and properties of composites of high density polyethylene (HDPE) and thermotropic liquid crystalline polymers (TLCPs). Strands of HDPE reinforced with TLCPs were generated using a novel dual extruder mixing technique. It was shown that the strength …
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The Development of Gelatin Based Tissue Adhesives for Use in Soft Tissue Biomedical Applications
… 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 dialdehyde) were …
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The processing and characterization of aluminum boride flake-reinforced aluminum matrix composites
… for greatly increased composite mechanical and wear properties because of their high aspect ratio, very high mechanical properties and good wetting to the aluminum matrix. This thesis describes, for the first time, an approach to the processing of AlB$\sb2$ flake reinforced aluminum alloy …
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Characterization of Carbon Mat Thermoplastic Composites: Flow and Mechanical Properties
… porous mat with the carbon fibers well dispersed and randomly oriented in a plane. CMT composites offer substantial cost and weight savings over typical steel construction in new automotive applications. In production vehicles, automotive manufacturers have already begun to use glass mat …
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A Study Of The Mechanical Behavior Of Composite Materials Exposed To Corrosive Environments
… of commercially pultruded polyester/e-glass and vinylester/e-glass composites were exposed to corrosive environments, namely: distilled water (h2o), bleach (naclo), and hydrochloric acid (hcl) for a minimum of 60 days, and the degradation was analyzed. Such a study was chosen on two accounts, …
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Strength Degradation of Gfrp Bars
… objective of this research was to examine the strength degradation of Glass Fiber Reinforced Polymer (GFRP) bars at high temperature and alkalinity and determine if an Arrhenius type relationship can be used as a means of projecting life. The work done includes a thorough literature review, …
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Elevated temperature mechanical properties of zirconium diboride based ceramics
… based ceramic at elevated temperatures. Flexure strength, fracture toughness, and elastic modulus were measured at temperatures up to 2300ºC for three compositions: monolithic ZrB₂ (Z); ZrB₂ - 30 vol% SiC - 2 vol% B₄ C (ZS); and ZrB₂ - 10 vol% ZrC (ZC). In argon, Z, ZS, and ZC had strengths of …
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Physical, mechanical and thermal conductivity of concrete containing granulated recycled pet bottle
… in the construction industry. Its high demand has threatened the environment and led to the depletion of natural resources such as sand, which is the basic material of concrete. Many strategies have been proposed to overcome these issues, such as reusing waste materials in concrete …
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Unbonded Monostrands for Camber Adjustment
… slab. For adjacent members like deck bulb-tees and box girders that are to be transversely post-tensioned the differential camber causes problems during the fit up process. This variation is undesirable and hinders the smooth progress of construction work if not properly accounted for at the …
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