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 9 of 9 for “"transversely isotropic material"”.
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Propagation of fluid driven fractures in transversely isotropic material
… the mechanics of hydraulic fractures (HF) in isotropic media is well established, the impact of the anisotropy of natural rocks on HF propagation is still far from being understood. Sedimentary rocks like shales and mudstones are ubiquitous in upper earth crust which are made of fine layers …
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Identification of Transversely Isotropic Material Properties from Cardiac Magnetic Resonance Elastography
… elastography (MRE) has been used to estimate isotropic stiffness in the heart, myocardium has anisotropic material properties with greatest stiffness along the fibre direction. This thesis investigated two methods for determining global transversely isotropic material properties from MRE …
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Dynamic simulation of heart mitral valve with transversely isotropic material model
… simulating, in the finite element setting, the material behavior of heart mitral valve leaflet tissue. First, a mixed pressure-displacement formulation is used to implement the constitutive material behavior with general 3D elements. Second, a shell is formulated that incorporates the 3D …
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Methods to improve indentation results on soft materials and anisotropic biological tissues
… the localized mechanical properties of materials, and it is an increasingly popular technique for studying biological materials. This thesis investigates difficulties and challenges regarding the application of micro-scale indentation. This study first develops a novel approach, namely …
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A virtual element method for hyperelasticity
… which must be approximated. Problems concerning isotropic and transversely isotropic hyperelastic material models are considered. Examples of transversely isotropic materials, which are characterised by an axis of symmetry normal to a plane of isotropy, range from simple fibre-reinforced …
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Active contraction of the left ventricle with cardiac tissue modelled as a micromorphic medium
… muscle tissue. This is due in part to the anisotropic, non-linear and time-dependent behaviour as well as the complex hierarchical material structure of biological tissues. In general, cardiac tissue is treated as a non-linear elastic and incompressible material. Most computational studies …
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Finite Deformations of Fiber-Reinforced Rubberlike Solids, and of Adhesively Bonded T-peel Joints
Fiber-reinforced rubberlike materials (FRRM) commonly used in tires undergo large deformations, and exhibit different response in tension and compression along the fiber direction. Assuming that the response of a fiber-reinforced rubberlike material can be modeled as transversely isotropic with the …
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A study on the behaviour of guided wave propagation in utility timber poles
Timber is a widely used engineering material because of its availability and good engineering properties. The round timber is suitable for electricity poles, wharfs, piles, bridge piers, etc. There are nearly 7 million utility poles in the current network in Australia, in which around 5 million …
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Development and Application of Low-Order Computational Models of the Left Ventricle
… We assume the "Guccione law," a four parameter transversely isotropic material law, for the elastic properties of the myocardium. The stiffness parameters are estimated using two objective functions: a displacement objective and an aggregated objective. We find that the GLO model is capable of …