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Showing 1 to 20 of 72 for “"material behaviour"”.
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An investigation into the material behaviour of reinforced concrete beams
An investigation into the material behaviour of reinforced concrete beams is presented. This investigation is divided into two parts. First, the experimental load-deflection tests on eleven under-reinforced two-span- and four slightly over-reinforced simply-supported beams are presented. The finite …
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Entwicklung mechanischer Modelle zur analytischen Beschreibung der Materialeigenschaften von textilbewehrtem Feinbeton
… level for the analytical description of the material properties of textile reinforced concrete (TRC). For the modelling of the heterogeneous structure of TRC the concept of representative volume elements (RVE) is used. RVEs are representative for the mesoscopic structure. The overall material …
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Vector offset operators for deformable organic objects.
Many natural materials and most of living tissues exhibit complex deformable behaviours that may be characteriseda s organic. In computer animation, deformable organic material behaviour is needed for the development of characters and scenes based on living creatures and natural phenomena. This …
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Microstructural non-linear finite-element analysis of rat myocardium with hydrogel biomaterial inclusions
Hydrogel biomaterial injectate therapies have emerged as a promising treatment modality for myocardial infarction (MI). Studies conducted on small and large animal models have yielded positive results in improving cardiac function and reducing adverse ventricular remodelling post-MI. These …
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Stochastic structural analysis of engineering components using the finite element method
… three-dimensional beam element limited to linear material behaviour and a two-dimensional plane element involving elastic-plastic material behaviour. The plane element incorporates plane strain, plane stress and axisymmetric formulations. The numerical accuracy and robustness of the routines are …
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Biological tissue mechanics with fibres modelled as one dimensional Cosserat continua: applications to cardiac tissue in healthy and diseased states
Classically, the elastic behaviour of cardiac tissue mechanics is modelled using anisotropic strain energy functions capturing the averaged behaviour of its fibrous microstructure. The strain energy function can be derived via representation theorems for anisotropic functions where a suitable …
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Seismisch belastete Schüttgutsilos
The seismic behaviour of the granular material silos is not well known. To simulate the seismic behaviour a numerical model was developed. The model consists of three components, these being the granular material, the contact area between the granular material and the silo wall and the silo wall …
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The design and performance of non-linear vibration isolating materials.
The mechanical properties of resilient cellular materials, such as dynamic stiffness and damping, depend on several physical parameters characteristic of the material and the conditions of use, eg permeability, elastic modulus, cellular structure, static pre-strain. In many end use situations the …
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The Ballistic Response of Particle-Filled Elastomeric Systems
… polymer composites in an effort to link the bulk material behaviour to variations in the microstructure. The multiphase systems under investigation consist of micron-sized ceramic powders integrated within a siloxane elastomer to create flexible particulate composites. In particular, the role of …
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Rheological and Mechanical behaviour of Block copolymers, Multigraft copolymers and Block copolymer Nanocomposites
… and fundamentally interesting class of polymeric materials. The ability to undergo interfacial thermodynamics-controlled microphase separation from a completely disordered state in the melt to a specifically defined ordered structure through self-organization makes the block copolymers based …
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DEVELOPING A COUPLED MICROSTRUCTURE FLUID FLOW MODEL FOR SOLIDIFICATION IN ADDITIVE MANUFACTURING
… we aim to provide deeper insights into material formation by exploring the often-neglected or partially integrated aspect of fluid flow within the melt pool. This fluid flow is crucial as it influences concentration and temperature distribution, impacting microstructure development and …
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Determination of material properties of mild steel at different temperatures and strain rates
Quantification of material properties through physical experiments is of significant importance. Test data from such experiments aid in the understanding of the material behaviour when exposed to a variety of loading conditions. Such data also help in the formulation of empirical and constitutive …
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Thermische Analyse des Zerspanens metallischer Werkstoffe bei hohen Schnittgeschwindigkeiten
… whole process, since parameters as tool wear, material behaviour and friction are influenced. A turning process with cutting speeds up to 100 m/s is investigated in this work for the workpiece materials AISI 1045 steel, AA 7075 aluminium, and Ti6Al4V titanium. The results show a strong …
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The effect of viscoelastic deformation in pipe cracks on leakage response to variations in pressure
… the pressure-leakage relationship is pipe material behaviour (Van Zyl & Clayton 2007; Greyvenstein & Van Zyl 2007). The pressure – leakage relationship has been described by several relationships such as the Torricelli equation, the Fixed and Variable Area Discharge (FAVAD) concept and the …
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Analytical behaviour of FRP strengthened reinforced concrete beams under low velocity impact load incorporating rate dependant material constitutive models
… resistance, excellent creep and fatigue behaviour, and ease of installation are amongst some of the advantages offered by externally bonded FRP systems over traditional strengthening methods. In addition to strengthening for static loading, there are many scenarios where strengthening is …
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Finite element modelling the forming of components for portable electronic devices
… components are no different, with new materials and configurations proposed to fulfil these increasing performance requirements. The favourable inherent mechanical properties possessed by poly(ether-ether-ketone) (PEEK) suggest its inclusion as a critical component within a global …
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Modeling of laminated veneer lumber - A study of the material properties for thick structural elements
This thesis studies the material properties of laminated veneer lumber (LVL). LVL is a timber product made of thin veneers of wood, glued together to form a laminate. The work has been carried out with the aim of providing a better understanding of LVL when designing large structures, in particular …
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The Influence of Substructure and Dislocation Mobility on the Creep Properties of Some Single Phase Metals
… rate teats have established that these three materials exhibit a spectrum of behaviour as wide as wide as any previously reported. Detailed microstructural examination has revealed corresponding variations in dislocation arrangements and in the extent of grain boundary distortion in crept …
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Numerical analysis of compressive residual stresses in metallic materials as a result of shot peening
… of the shot peening process on a target material. A Finite Element based software (ABAQUS) model was employed to simulate the material behaviour and elastic-plastic deformation a metallic material undergoes during shot peening. An experimental platform was established by performing shot …
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CFD modelling of fluid flow and contaminant transport in hydrogeological systems
… CFD and CSM problems is employed. The non-linear material behaviour exhibited by porous soils and the fluid flow evaluation under system stresses is described by elasto-visco-plastic constitutive relationships and the coupling between CFD and CSM processes. The designed simulation models are used …
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