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 “"Increase in Ductility"”.
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Exploring the Mechanical Behavior of a Traditional Japanese Joint for Flexible Structural Design
This research examines the mechanical behavior of a traditional Japanese joint, the Mortised Rabbeted Oblique (MRO) splice. Through computational simulations employing Finite Element Analysis (FEA), the study examines a continuous beam and an unmodified MRO splice, revealing expected behavior in …
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Constitutive Behavior of Bulk Metallic Glass Composites at Ambient and High Temperatures
When certain molten metallic alloys are rapidly quenched, they solidify to yield a disordered microstructure, called a metallic glass. Metallic glasses are generally brittle at room temperatures and fail catastrophically via one dominant or multiple shear bands. These limitations can be overcome by …
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Toughening mechanisms in composites of miscible polymer blends with rigid filler particles
… improve toughness and stiffness simultaneously in some cases. The effect depends on interparticle distance as well as interfacial adhesion. This type of toughening has been more successful in semicrystalline than in amorphous systems. An amorphous polymer blend was chosen to elucidate the effect …
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Ductile fracture after complex loading histories : experimental investigation and constitutive modeling
In engineering practice, sheet metal often fails after complex strain paths that deviate substantially from the widely studied proportional loading paths. Different from previous works on the ductile fracture of sheet metal, this thesis research addresses the experimental and modeling issues …
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Experimental and Theoretical Investigations of a New Flat Slab System Incorporating GFRP Stay-In-Place Structural Forms and Embedded I-Beams
… concrete flat-slab design for floors is introduced. It includes embedded glass fiber-reinforced polymer (GFRP) I-sections as primary and secondary beams, with columns supporting the primary beams. GFRP stay-in-place (SIP) structural forms span the spacing between, and are bonded to, the …
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Effect of composite action on the dynamic behaviour of space structures
… of composite action ushered a new era in the use of double-layer spaceframes as efficient floor systems in addition to their competitiveness as roof coveringstructural systems. Earlier research on space frames demonstrated large improvementsin their static behaviour caused by the …
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Design and Optimization of Angiogenic, Antibacterial Si-Zn-Hydroxyapatite for Use as Filler Particles in Polycaprolactone Nanocomposites
… and mechanical resilience of native bone remains a central challenge in tissue engineering. Hydroxyapatite (HAp) is a widely used osteoconductive ceramic, but clinical outcomes can be limited by relatively low levels of bioactivity, inherent brittleness, slow in vivo resorption, and …
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Stress-Strain Behavior for Actively Confined Concrete Using Shape Memory Alloy Wires
Within this work a new and innovative method using shape memory allow (SMA) wires to actively confine concrete members is discussed and further researched in great detail. This new confinement method utilizes a constant confining pressure that is a direct result to the SMA material being able to …
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Elevated temperature mechanical properties of line pipe steels
… temperature on the tensile properties of four line pipe steels were evaluated. The four materials include a ferrite-pearlite line pipe steel with a yield strength specification of 359 MPa (52 ksi) and three 485 MPa (70 ksi) yield strength acicular ferrite line pipe steels. Deformation behavior, …
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Selective laser melting of Ti-35NB alloy: Processing, microstructure and properties
The initiative of a sustainable material system needs to lower the environmental and economic impact of production processes and adopt new ways of synthesizing and re-using materials. Even though the current conventional manufacturing processes, such as powder metallurgy, casting, forging, and …