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 1206 for “"Isotropic"”.
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Crack propagation in isotropic materials
This thesis presents a numerical study of crack propagation in brittle materials. The finite element method using constant strain triangular elements was used. The experimental investigation is based on Gurney and Hunt's quasi-static method of fracture testing.<br/><br/>The applicability of the …
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Strength of transversely isotropic rocks
This thesis proposes a new Anisotropic Matsuoka-Nakai (AMN) criterion to characterize the failure of transversely isotropic rocks under true triaxial stress states. One major obstacle in formulating an anisotropic criterion is that it usually involves six stress components, instead of three …
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Elasto-viscoplasticity of isotropic porous metals
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1992.
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The Rosensweig instability in isotropic magnetic gels
Die vorliegende Arbeit befasst sich mit der nichtlinearen theoretischen Analyse der Rosensweig Instabilität in isotropen magnetischen Gelen. Die Rosensweig Instabilität beschreibt den Übergang einer zunächst flachen Oberfläche zwischen einer magnetischen Flüssigkeit zu einer hexagonal geordneten …
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Borehole Breakouts in Transversely Isotropic Posidonia Shale
… for conventional triaxial loading conditions in isotropic rocks (Dresen et al., 2010) has been successfully extended to true triaxial loading conditions in the transverse isotropic rock to predict the initiation of borehole breakouts. The criterion was successfully verified on the experiments …
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Statistical physics of isotropic-genesis nematic elastomers
"Isotropic-genesis nematic elastomers (IGNEs) are materials that exhibit fascinating properties such as a remarkable softness in elasticity and do not undergo long-range nematic ordering, even at low temperatures. These materials are formed via the following process. Consider a melt or solution of …
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Isotropic graphs with applications to parallel computation
This thesis studies the construction of expanding graphs and their applications to parallel computation. In particular, we consider explicit construction techniques, based on finite fields, that provide graphs which exhibit good expansion properties at low densities and can be efficiently …
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Elastically-isotropic mechanical metamaterials : theory and experiments
… with the conception of three-dimensional isotropic metamaterials, a particularly important class of mechanical metamaterials exhibiting direction-independent behavior at the macroscopic level.
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Direct numerical simulation of droplet-laden isotropic turbulence
… with 5~\% droplet volume fraction in decaying isotropic turbulence at initial Taylor-scale Reynolds number $\Rey_\lambda=83$. In the droplet-laden cases, we vary one of the following three parameters: the droplet Weber number based on the r.m.s. velocity of turbulence ($0.1 \leq \Webrms \leq …
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Boundary-value problems for transversely isotropic hyperelastic solids
… of dead-load tractions in respect of transersely isotropic elastic materials. In particular, Chapter 1 mainly consists of existing preliminary remarks on the continuum (phenomenological) approach used here to study the mechanical response of elastic materials under large strains. More …
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The Deformation of Grade One Hyperelastic Isotropic Solids
Made available in DSpace on 2014-12-10T17:25:51Z (GMT). No. of bitstreams: 1 7000936.pdf: 2042278 bytes, checksum: 76d35cf61ce2d25e9769908fdd7cc078 (MD5) Previous issue date: 1969
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A virtual element method for transversely isotropic elasticity
… of plane problems concerning transversely isotropic elasticity, using a low-order virtual element method (VEM). The VEM is an alternative finite element method characterised by complete freedom in determining element geometries that are otherwise polygonal in two dimensions, or polyhedral …
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Restriction to hypersurfaces of non-isotropic Sobolev spaces
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1993.
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Variational constitutive updates for strain gradient isotropic plasticity
In the past decades, various strain gradient isotropic plasticity theories have been developed to describe the size-dependence plastic deformation mechanisms observed experimentally in micron-indentation, torsion, bending and thin-film bulge tests in metallic materials. Strain gradient plasticity …
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Particle ejection and suspension due to isotropic turbulence
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1993.
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In-plane vibrations of a transversely isotropic arch
A model for the dynamic response of a laminated composite arch is developed from classical shell theory. The problem is reduced from a shell to an arch by making an assumption that the variation of the field of variables in the direction of the width of the arch is small compared to those in other …
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Beyond the isotropic two-dimensional Heisenberg model: Raman scattering studies of the transition between isotropic and anisotropic spin dynamics in Sr2IrO4
… model. However, for H<1.5 T, it shows anisotropic behavior as a function of external field due to interlayer couling. Ths study showed that while for even for moderate field, the magentic behavior is consistent with suggested two-dimensional effective S=1/2 Hamiltonian, for in low fields …
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Natural frequencies of isotropic circular plates of variable thickness
Digitized by Kansas Correctional Industries
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