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 “"yield behaviour"”.
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Understanding the Yield Behaviour of Single Crystal Ni-based Superalloys
… in the narrow channels between precipitates. The yield point was found to correspond to the entry of dislocations into the γ' precipitates. Of the dislocations which enter into γ', only a small portion were observed to cross-slip. Due to the two-phase microstructure, dislocation loops are able to …
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Laboratory Investigation of Shear Behaviour in Rock Joints Under Varying Boundary Conditions
… and govern the material response. Discontinuity behaviour can have a large impact in geotechnical design, and therefore it is essential to determine their geomechanical properties in order to predict rockmass behaviour and prevent any potential failure that would pose a threat to personnel safety …
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A mathematical formulation of intelligent agents and their activities
… of smaller components. These components embed behaviour that is determined by simple rules. The interactions between the components, however, often yield behaviour, the complexity of which surpasses what can be captured by the systems of equations that arise from a top-down approach. In this …
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A microtexture based analysis of surface roughening in ductile metals during tensile deformation
… data allowed the calculation of the plastic flow behaviour of discrete volumes of the sample material. The yield behaviour was implemented in a finite element model to simulate the material behaviour under uniaxial tensile conditions. Analysis of microtexture results has indicated that elongated …
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A microtexture based analysis of surface roughening in ductile metals during tensile deformation
… data allowed the calculation of the plastic flow behaviour of discrete volumes of the sample material. The yield behaviour was implemented in a finite element model to simulate the material behaviour under uniaxial tensile conditions. Analysis of microtexture results has indicated that elongated …
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The relationship between texture and formability in sheet metals
… can lead to a better understanding of materials behaviour and, from this, to the development of conveniently textured materials so that their anisotropy can be utilized in an advantageous manner. In the present work mechanical properties, yield loci,formability parameters, earing and the …
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Yielding of unsaturated soil.
… develop a better understanding of the mechanical behaviour of unsaturated soils in terms of elastoplastic critical state constitutive models. These models are defined in terms of four independent stress state variables : mean net stress, deviator stress, suction and specific volume. An important …
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The effect of boundary conditions and architecture on the response of cancellous bone
… diameter increase having no effect. Inner core yield strength was 58% higher in the 20 mm samples, and roughly 96% higher in the 28 mm samples compared to full specimen yield strength. This suggested that post-yield behaviour requires a further increase in overall diameter to sufficiently remove …
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Deformation at Low Temperatures in Single Crystal Ni-base Superalloys
… gas turbine applications has focused on creep behaviour in the high-temperature regime (above 700 °C). However, the study of deformation in the range of 20 °C to 700 °C is critical to understanding behaviour in the shanks of turbine blades in service, where the low-temperature properties of …
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Three dimensional geometrical and material nonlinear finite element analysis of adhesively bonded joints for marine structures
… as elasto-plastic continuum, where the nonlinear behaviour is modelled as either a rigid or a semi-rigid adhesive solid that can be represented by the Ramberg-Osgood material model. The yield behaviour of the polymeric adhesive is modelled using a modified von Mises criterion, which accounts for …