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Dissertations / Theses on the topic 'Volumetric strain'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

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1

Bilge, Habib Tolga. "Cyclic Volumetric And Shear Strain Responses Of Fine-grained Soils." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/3/12611819/index.pdf.

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Although silt and clay mixtures were mostly considered to be resistant to cyclic loading due to cohesional components of their shear strength, ground failure case histories compiled from fine grained soil profiles after recent earthquakes (e.g. 1994 Northridge, 1999 Adapazari, 1999 Chi-Chi) revealed that the responses of low plasticity silt and clay mixtures are also critical under cyclic loading. Consequently, understanding the cyclic response of these soils has become a recent challenge in geotechnical earthquake engineering practice. While most of the current attention focuses on the assess
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2

Jensen, Elisabeth Rose. "In vivo quantification of three dimensional volumetric strain in the human tibialis anterior." Thesis, College of Medicine - Mayo Clinic, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10111521.

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<p> Intramuscular pressure (IMP), which is closely correlated with both active and passive muscle tension, may become a useful supplement to current clinical tools as a means to quantify individual muscle-generated force. A continuing challenge associated with this measure is its non-uniform distribution, which is not yet fully understood. Several studies have observed that pressure increases with muscle depth. Conservation of mass suggests that these regional pressure differences may result from non-uniformly distributed changes in local tissue volume. Therefore, the overarching goal of this
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3

Quinn, Turlough. "Rate effects in fine grained soils." Thesis, University of Dundee, 2013. https://discovery.dundee.ac.uk/en/studentTheses/92451824-2c3f-4162-8626-502cfe9424d6.

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The strain rate dependent behaviour of fine grained soils is an important aspect of geotechnical engineering. During dynamic or rapid events such as earthquakes and rapid pile testing, a fine grained soil will display significantly different behaviour than may be observed over the long life span of a structure. There is currently little understanding of the factors which influence the behaviour of fine grained soils during dynamic events (extremely high strain rates), making their response difficult to predict. This research investigates the behaviour of fine grained soils subjected to a wide
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4

Augustine, Daniel. "Cardiovascular magnetic resonance deformation imaging by feature tracking for assessment of left and right ventricular structure and function." Thesis, Queen Mary, University of London, 2014. http://qmro.qmul.ac.uk/xmlui/handle/123456789/7872.

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Cardiac magnetic resonance (CMR) imaging is the gold standard imaging technique for assessment of ventricular dimensions and function. CMR also allows assessment of ventricular deformation but this requires additional imaging sequences and time consuming post processing which has limited its widespread use. A novel CMR analysis software package, ‘feature tracking’ (Tom Tec, Germany) can measure ventricular deformation directly from cine CMR images. This thesis seeks to further our understanding of the feasibility of feature tracking to assess myocardial deformation and volumetric measures. Cha
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5

Kinney, Landon Scott. "Pore Pressure Generation and Shear Modulus Degradation during Laminar Shear Box Testing with Prefabricated Vertical Drains." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/7709.

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Liquefaction is a costly phenomenon where soil shear modulus degrades as the generation of excess pore pressures begins. One of the methods to mitigate liquefaction, is the use of prefabricated vertical drains. Prefabricated vertical drains provide a drainage path to effectively mitigate the generation of pore pressures and aid in shear modulus recovery. The aims of this study were to define shear modulus degradation vs. shear strain as a function of excess pore pressure ratio; define the effects of prefabricated vertical drains on the behavior of pore pressure generation vs. shear strain; and
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6

Champiré, Florian. "Étude expérimentale du comportement hydro-mécanique de la terre crue compactée pour la construction." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSET007/document.

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Le matériau terre peut apporter une réponse face aux problèmes que les constructions modernes rencontrent en termes d’enjeux sociétaux, économiques et écologiques. Cependant, les difficultés à comprendre et à prédire son comportement représente un obstacle au développement de cette technique dans les pays développés. Cette thèse s’insère dans un projet de recherche appelé « Primaterre » et financé par l’Agence Nationale de la Recherche française (ANR). Il vise à apporter les connaissances scientifiques nécessaires afin de pallier ce manque et aider à établir des règlementations adaptées. Ce tr
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7

Jakel, Roland. "Analysis of Hyperelastic Materials with Mechanica - Theory and Application Examples." Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-201000705.

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Part 1: Theoretic background information - Review of Hooke’s law for linear elastic materials - The strain energy density of linear elastic materials - Hyperelastic material - Material laws for hyperelastic materials - About selecting the material model and performing tests - Implementation of hyperelastic material laws in Mechanica - Defining hyperelastic material parameters in Mechanica - Test set-ups and specimen shapes of the supported material tests - The uniaxial compression test - Stress and strain definitions in the Mechanica LDA analysis Part 2: Application examples - A test specimen
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8

Zhang, Lei. "Sur une approche isogéométrique pour problèmes multi-champs couplés en grandes transformations." Thesis, Ecole centrale de Marseille, 2016. http://www.theses.fr/2016ECDM0012/document.

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La méthode isogéométrique (IGA) récemment proposée en tant que méthode numérique générique offre de réelles perspectives dans l’unification des modèles géométriques et computationnel. La méthode isogéométrique est intiment liée à la méthode des éléments finis (FEM) étant donné que la méthode est basée sur le même cadre variationnel. Cette méthode a montré dans de nombreuses circonstances de très bonne qualités numériques notamment avec des maillages grossiers (précision numérique, capacité à supporter de grandes déformations…). Notre objectif final dans ce travail est de fournir un environneme
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9

Batagini, Nayara Cioffi. "Volumetria e parâmetros biomecânicos detectados pela Ultrassonografia 3D e 2D em aortas abdominais de pacientes com e sem aneurisma." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/5/5132/tde-06012017-105117/.

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INTRODUÇÃO: O diâmetro transverso máximo (DTM) de um aneurisma da aorta abdominal (AAA), a medida mais comumente utilizada para determinar quando uma intervenção cirúrgica está indicada nos portadores desta afecção, tem limitações e não reflete o exato risco de rotura. Parâmetros biomecânicos e morfológicos detectados pelo ultrassom (US) com propriedades tridimensionais (3D), podem ajudar a melhor entender o comportamento dos AAA e a determinar o melhor momento para o tratamento cirúrgico deste grupo de pacientes. OBJETIVOS: Verificar a capacidade e a viabilidade do ultrassom bidimensional (US
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10

Wu, Ji-Wei, and 吳繼偉. "Volumetric Strain of Large Specimen in Shaking Table Test." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/67326146503512688592.

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碩士<br>國立臺灣大學<br>土木工程學研究所<br>93<br>Volumetric Strain of Large Specimen in Shaking Table Test ABSTRACT The shaking due to earthquakes or vibrations will generate excess pore water pressure in saturated sand. After shaking, the excess pore water pressure in the saturated sand layer dissipates with time, and the volume of the sand layer decreases and settlement occurs. In 1999, Chi-Chi Earthquake caused liquefaction in many areas with sandy soil layer in mid-Taiwan, for example, Taichung Seaport, Yuanlin, Wufeng and Nantou area. This experience alarms us that there is necessity to study further t
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11

Hung-TungHsu and 許紘東. "A Study on Volumetric Strain Behavior of Low Plasticity Silty Sand." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/85243946670773476533.

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碩士<br>國立成功大學<br>土木工程學系碩博士班<br>101<br>Many severe natural disasters resulted from soil liquefaction during earthquakes in the world. The ground subsidence due to the soil liquefaction was also resulted in secondary damage of the structures. In recent years, soil liquefaction induced from the earthquakes was found in many strata with low-plastic silts around the world. Therefore the study of the dynamic behavior of low-plasticity silt of is necessary. The major difficulty during investigating the low-plasticity silt was unable to obtain the soil specimen which can represent the field conditions;
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12

Sheng-YuanHong and 洪聖淵. "A Study on Post-Liquefaction Volumetric Strain Behavior of Low Plasticity Silty Sand." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/80188039484250960790.

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碩士<br>國立成功大學<br>土木工程學系碩博士班<br>100<br>In recent years, many severe disasters resulted from soil liquefaction during major earthquakes in the world and ground subsidence due to the rearrangement of soil grains after earthquake was also resulted in secondary damage of the structures. Previous literatures were focused on the volume change of remolded clean sand during liquefaction. However, soil liquefaction induced from earthquake was also found in strata other than clean sand, especially in many strata with low-plastic silts. In this study, the undisturbed low-plastic soil specimens are obtained
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13

Berry, Alan David. "Development of a volumetric strain influence ground improvement prediction model with special reference to impact compaction." Diss., 2001. http://hdl.handle.net/2263/29942.

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Aubrey Berrangé, a South African roads engineer, invented the impact compactor in 1949 with the intention of achieving improved compaction to greater depths than possible with conventional equipment available at the time. The aim of this dissertation is to present a simple prediction model for the profile of improvement in the ground, using surface settlement as the main input parameter. The model is based on the information reviewed, observation of field data and a static numerical analysis. For simplicity sake, no attempt is made to predict the energy requirement to achieve the input value o
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14

Wu, Sin-Mei, and 吳欣玫. "Coseismic Velocity Reduction Correlated with Volumetric Strain Change Induced by Recent Large Earthquakes in the Central Range of Taiwan." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/56364838011536761584.

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碩士<br>國立臺灣大學<br>地質科學研究所<br>102<br>Coseismic velocity reduction has been considered to be mediated by perturbations of stress and strain conditions in the crust and/or increased permeability/porosity of fractured rocks within the quake-damaged zones. To investigate potential changes and causes in crustal strains and rock properties of areas impacted by the earthquake ruptures of the two recent large events, Jiasian and Nantou, (Mw > 6 and focal depth > 20 km) occurring in the south Central Range of Taiwan, we construct empirical Green’s functions (EGFs) from cross-correlation functions (CCFs) o
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15

Das, Pradipta Kumar. "Extensional subsidence, inversion and volumetric contraction in the Bass Basin of Australia : a seismic study / Pradipta Kumar Das." 2001. http://hdl.handle.net/2440/21781.

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"August, 2001"<br>Bibliography: leaves 173-183.<br>xvi, 184, 12 leaves : ill. (some col.), maps, plates (some col.) ; 30 cm.<br>Title page, contents and abstract only. The complete thesis in print form is available from the University Library.<br>"The primary objective of the study was to gain a better understanding of the tectonostratigraphic evolutionary history of the Bass Basin. In particular, the study has focussed on mapping and analysing all the faults and fault patterns in the Bass Basin in relation to the subsidence history and its influence on sedimentation and hydrocarbon potential
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16

Zhao, Yufeng. "Stress-induced permeability evolution in coal: Laboratory testing and numerical simulations." 2020. https://tubaf.qucosa.de/id/qucosa%3A71758.

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Mining operations produce a multiscale network of fractures in the coal seams. Permeability evolution in rocks is important for coal bed methane (CBM) and shale gas exploitation as well as for greenhouse gas storage. Therefore, this work presents laboratory tests and a coupled model using PFC3D and FLAC3D to simulate the stress induced permeability evolution in coal samples. Basic mechanical properties are determined via lab testing. The spatial distributions of different components inside the reconstructed samples produce a significant heterogeneity based on CT technique. A newly developed ex
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17

Mullan, Sean. "Tidal sedimentology and geomorphology in the central Salish Sea straits, British Columbia and Washington State." Thesis, 2017. https://dspace.library.uvic.ca//handle/1828/8943.

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Intra-archipelago waterways, including tidal strait networks, present a complex set of barriers to, and conduits for sediment transport between marine basins. Tidal straits may also be the least well understood tide-dominated sedimentary environment. To address these issues, currents, sediment transport pathways, and seabed sedimentology & geomorphology were studied in the central Salish Sea (Gulf and San Juan Islands region) of British Columbia, Canada and Washington State, USA. A variety of data types were integrated: 3D & 2D tidal models, multibeam bathymetry & backscatter, seabed video, gr
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