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 77 for “"Small-strain"”.
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Small strain stiffness of fine grained soils
Dynamic measurements of very small strain stiffness (c - 0.001% and less) were carried out both in the laboratory, using piezoceramic bender elements of the type developed at the Norwegian Ceotechnical Institute and at the University College of North Wales, and in situ, using surface wave …
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The measurement and interpretation of small strain stiffness of soils
The measurement of soil stiffness at very small strains (Gmax) has been carried out under both dynamic and continuous loading in the triaxial apparatus up to high stresses. A new system of LVDTs has been used to measure axial strain locally during continuous loading while dynamic stiffnesses were …
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Variational formulations and numerical analysis of some problems in small strain elastoplasticity
… approximation of two boundary-value problems in small strain elastoplasticity. The first problem, which we call the incremental holonomic problem, is based on a consistent incremental holonomic constitutive law, which in turn derives from the notion of extremal paths in stress and strain space as …
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Influence of some particle characteristics on the small strain response of granular materials
The key parameters representing the small strain response of geomaterials are the very small strain shear modulus, Gmax, shear modulus degradation G/Gmax, and damping ratio. These are also important parameters in the design of foundations where only small deformation takes place. A review of the …
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A small strain, large rotation theory and finite element formulation of thin curved beams
… beam elements has been developed by using the constraint technique to include the convective coordinate system. The elements are relatively simple and the minimum number of degrees of freedom necessary has been used. The Total Lagrangian formulation has been shown to be numerically more effective …
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Uncertainties in the Estimation of the Shear-Wave Velocity and the Small-Strain Damping Ratio from Surface Wave Analysis
L'abstract è presente nell'allegato / the abstract is in the attachment
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An improved method for determinig the influence of temperature on the rate of development of insect eggs using eggs of the small strain of Calandra Oryzae L. (Coleptera)
Papers on the physiology of insect populations in relation to the physical environment
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An Experimental Study on the Aging of Sands
… property changes during the aging process: small strain shear modulus using bender elements, electrical conductivity, and mini-cone penetration resistance. At the end of each test, detailed mineralogical tests were performed to assess changes in the chemistry of the samples and pore fluids. …
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Factors affecting the initial stiffness and stiffness degradation of cohesive soils
This research investigated the pre-failure stress-strain behavior of cohesive soils through an ex.tensive testing program conducted on Resedimented Boston Blue Clay (RBBC). The uniformity and reproducibility in the behavior of this soil permitted a detailed study of the role of the following …
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A Mathematical Discussion of Corotational Finite Element Modeling
… (EICR) Method and the more general Unified Small-Strain Corotational Formulation. The former was developed by Rankin, Brogan and Nour-Omid [106]. The latter, created by Felippa and Haugen [49], provides a theoretical frame work for the EICR and similar methods and its own enhanced methods. …
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Simulation of Batch Thickening Phenomenon for Young Sediments
… by Papanicolaou (1992) to solve the governing small strain consolidation equation of second order non-linear transit partial differential equation of parabolic type. This program is modified to integrate the settling and consolidation processes together in order to provide continuous results …
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Kinetics and Pathways for Crystallization of Amorphous Mullite and YAG
… inclusions and the elimination of internal strain. Additionally, recrystallization of numerous, small, strain- and inclusion-free, 3:2 mullite grains was observed to occur as the process proceeded to completion.
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The modelling of natural fibre-reinforced composites using a multi-scale methodology
A multi-scale methodology for small strain linear elasticity is presented in this thesis. The homogenisation process is discussed in general, with particular attention to the required boundary constraints on the micro-domain and the extraction of an effective elastic modulus. For the case of a …
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Design and Additive Manufacturing of Carbon-Fiber Reinforced Polymer Microlattice with High Stiffness and High Damping
… damping performance, mechanical properties at small-strain and large-strain regimes are measured through dynamic material analysis (DMA) and quasi-static cyclic compression tests respectively. It is seen that both intrinsic (small-strain) and structural (large-strain) damping in terms of a …
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Overall results in second-order elasticity
… overall load-deformation relations for small-strain elastic deformations with large displacements has been adapted so that second-order elastic effects can be included in certain overall quantities such as bending stiffness without explicit determination of the second-order solution. The …
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Towards mechanism-based constitutive modelling of L1₂ crystal plasticity
… yield stress, tensioncompression asymmetry, and small strain rate sensitivity. Some ideas on revising the plasticity model have been presented. Though not completed, the new approach points to promising future directions in simulating both the yield behavior and the strain hardening properties of …
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Geometrically nonlinear finite element analysis of space frames
… for large displacement and large rotation, but small strain analysis. A beam-column element or finite element can be used to model geometrically nonlinear behavior of space frames. The two element models are compared on the basis of their efficiency, accuracy, economy and limitations. An …
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Ambrose Bierce: Between politics and philosophy
… others claim there has always existed a small strain of Burkean conservatism throughout American political history. This study supports the latter view by holding the political thought of Ambrose Bierce closely follows the conservative philosophy of Burke and other British conservatives.
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Parallel multilevel procedures for elastoplasticity computations in solid mechanics
… then used to recursively compute this error. A small strain, von Mises elasto-plastic material model with both kinematic and isotropic hardening rules has been implemented. A simple interpolation procedure to determine the state variables for all the coarse meshes in the hierarchy is …
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