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Dissertations / Theses on the topic 'In situ testing'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Williams, Valorie Sharron 1960. "In situ microviscoelastic measurements by polarization interferometry." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276691.

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A new type of computer-controlled instrument has been developed to measure microviscoelastic properties of thin materials. It can independently control and measure indentation loads and depths in situ revealing information about material creep and relaxation. Sample and indenter positions are measured with a specially designed polarization interferometer. Indenter loadings can be varied between 0.5 and 10 grams and held constant to ±41 mg. The resulting indentation depths can be measured in situ to ±1.2 nm. The load required to maintain constant indentation depths from 0.1 to 5.0 microns can b

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2

Hagen, Anette Brocks. "In-situ Compession Testing of Nanosized Pillars." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for materialteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25618.

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Applications of nanomechanical testing methods have become increasingly important in all fields of material research. There is a significant interest in obtaining information about material features at small scales, in order to get a detailed characterization of the materials deformation behavior. To meet the needs, various experimental techniques have been developed to explore mechanical properties at micro-and nanoscale. So far, most small-scale mechanical testing methods have been done at room temperature, since it does not require the special modification of equipment. However, engineering

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3

Crouthamel, David Roger 1963. "In-situ flow testing of borehole plugs." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/291331.

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A cement borehole plug and a crushed tuff/bentonite clay mixture borehole plug were tested insitu in highly welded tuff. The hydraulic performance of the cement plug was evaluated through steady-state and transient hydraulic tests with a hydraulic conductivity in the range of 10⁻¹⁰ cm/s. A crushed tuff/bentonite mixture plug was tested through a steady-state flow test with a measured hydraulic conductivity of 10⁻⁹ cm/s. The plug was installed in a fractured borehole which was grouted to reduce the overall rockmass permeability. Installation procedures were evaluated in the laboratory prior to

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4

Jailin, Clément. "Projection-based in-situ 4D mechanical testing." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLN034/document.

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L'analyse quantitative de volumes 3D obtenus par tomographie permet l’identification et la validation de modèles. La séquence d’analyse consiste en trois problèmes inverses successifs : (i) reconstruction des volumes (ii) mesure cinématique par corrélation d'images volumiques (DVC) et (iii) identification. Les très longs temps d’acquisition nécessaires interdisent de capter des phénomènes rapides. Une méthode de mesures, Projection-based Digital Volume Correlation (P-DVC), raccourcit la séquence précédente en identifiant les quantités clés sur les projections. Cette technique réduit jusqu'à 2

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5

Greina, Kristine. "IN-SITU FRACTURE MECHANICAL TESTING OF MICROSIZED CANTILEVERS." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for materialteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25617.

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The arctic is an appealing new ventures area for the oil and gas industry. However the climate is extremely demanding, and more technically challenging than any other environment. With design temperatures down to -60°C the ductile to brittle transition temperature (DBTT) is an important concern. The propagation of a brittle fracture in iron and steel requires much less energy than that associated with a ductile fracture. Once a material is cooled below the DBTT, it has a much greater tendency to shatter on impact instead of bending or deforming. The brittle-ductile behavior of BCC crystal

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6

Akbar, Aziz. "Development of low cost in-situ testing devices." Thesis, University of Newcastle Upon Tyne, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364801.

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7

Zhao, Yueyang. "In situ soil testing for foundation performance prediction." Thesis, University of Cambridge, 2008. https://www.repository.cam.ac.uk/handle/1810/283842.

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8

Li, Jingyun Evans John L. "Alternate in-situ environmental testing system by matrix design." Auburn, Ala, 2009. http://hdl.handle.net/10415/1619.

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9

Oswald, Louisa Jane, and n/a. "Usefulness of Macroinvertebrates for In Situ Testing of Water Quality." University of Canberra. Institute for Applied Ecology, 2008. http://erl.canberra.edu.au./public/adt-AUC20090107.130047.

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For various reasons, existing methods for the assessment of aquatic pollution do not always adequately address the way in which contaminants affect receiving environments and their component ecosystems. The main advantage of biological assessment over the measurements of physical and chemical aspects of water quality is that biota provide an integrated response to all prevailing influences in their environment. Biological assessment protocols have been developed for a range of test organisms, from bacteria to mammals using measurement from molecular biomarkers to indicators at the population o

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10

Daniel, Christopher Ryan. "Energy transfer and grain size effects during the Standard Penetration Test (SPT) and Large Penetration Test (LPT)." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/775.

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The Standard Penetration Test (SPT) is the most widely used in-situ soil test in the world. "Large Penetration Test" (LPT) is a term used to describe any scaled up version of the SPT. Several types of LPT have been developed around the world for the purpose of characterizing gravel deposits, as SPT blow counts are less reliable in gravels than in sands. Both tests suffer from the lack of a reliable means of determining transferred energy. Further, the use of LPT blow counts is generally limited to calculation of equivalent SPT blow counts using correlation factors measured in sands. Varia

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11

Hess, Jeremy. "In-Situ Testing of Uretek's Injectable Barrier as a Mechanism for Groundwater Control." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6095.

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Construction projects involving the installation or repair of subsurface structures or utilities often require dewatering to induce a temporary lowering of the local groundwater elevation to facilitate construction. In the event that a known contaminant plume is present in an adjacent area, this dewatering may inadvertently draw the contaminant into the previously uncontaminated work area. Uretek Holdings, Inc. has developed its Injectable BarrierSM to be installed prior to dewatering exercises to provide a groundwater cut-off by reducing the potential movement of groundwater due to the hydr

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12

Lynch, Alan Gerald. "Trends in back-calculated stiffness of in-situ recycled and stabilised road pavement materials." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85857.

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Thesis (MEng)-- Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: Two common methods of road pavement, granular material stabilisation used in road construction throughout South Africa today include Cold in Place Recycling (CIPR) and stabilisation with cement or bitumen and an active filler to create Bitumen Stabilised Materials (BSM). As part of the updating of the South African Pavement Design Method (SAPDM) an experimental section, investigating the structural capacity of cement and lime stabilised and BSM pavement layers, was constructed and will be monitored over a two year period.

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13

Richardson, Sarah. "In-Situ Testing of a Carbon/Epoxy IsoTruss Reinforced Concrete Foundation Pile." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1280.pdf.

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14

Davies, Michael Paul. "Predicting axially and laterally loaded pile behaviour using in-situ testing methods." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26689.

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The prediction of axial and lateral pile behaviour is a complex engineering problem. Traditional methods of data collection and subsequent analyses are frequently in error when compared to full-scale, load tests. In-situ testing, using advanced electronic tools, provides a means by which representative field data may be obtained. This study investigates the use of such in-situ data in predicting axially loaded pile capacity and laterally loaded pile load-deflection behaviour. A total of twelve static axial pile capacity methods were evaluated to predict the results obtained from eight full-s

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15

Briston, Kevin James. "The functional testing of individual nano-objects using in-situ electron miicroscopy." Thesis, University of Sheffield, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555646.

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Nano-objects, such as nanowires and carbon nanotubes, are very important for the future of the electronics industry due to their potential for creating novel devices and to continue increasing the densities of devices on microchips. In-situ electron microscopy techniques are ideal for performing functional testing of these nanoobjects, since they allow functional properties and behaviour of the nano-objects to be directly related to dynamic observations of their structure. In this work tools and techniques have been developed for the investigation of nano-objects using in-situ electron microsc

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16

Farrington, Robert. "Testing mixed phase cloud parametrizations through confronting models with in-situ observations." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/testing-mixed-phase-cloud-parametrizations-through-confronting-models-with-insitu-observations(e2b7e31b-fa4a-4501-9f30-2ca2452c58fa).html.

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Accurate representations of clouds are required in large-scale weather and climate models to make detailed and precise predictions of the Earth's weather and climate. Representations of clouds within these models are limited by the present understanding of the role of aerosols in the microphysical processes responsible for cloud formation and development. As part of a NERC funded CASE studentship with the Met Office, this thesis aims to test new aerosol-dependent mixed-phase cloud parametrizations by obtaining extensive cloud microphysical measurements in-situ and comparing and contrasting the

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17

Kidd, David Alan 1956. "In situ testing of Gila Conglomerate with application to probabilistic slope stability." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/277060.

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In this study the shear strength parameters for a consolidated, well-cemented boulder conglomerate at the Cyprus Miami Copper Mine are determined by a newly developed field test. The values obtained are used to investigate the probability of failure of pit slopes cut into the conglomerate. Any boulder conglomerate is impossible to test accurately with conventional laboratory techniques due to its large particle sizes and the destruction of cementation by conventional sampling methods. For these reasons a simple in situ test was developed which could be used in conjunction with laboratory techn

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18

Pavic, Aleksandar. "Vibration serviceability of long-span cast in-situ concrete floors." Thesis, University of Sheffield, 1999. http://etheses.whiterose.ac.uk/3486/.

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This thesis describes an investigation into the vibration serviceability of long-span and slender in-situ concrete floors, which are typically post-tensioned. The motivation for the research is the present trend towards increased slenderness of post-tensioned floors supporting open-plan high- quality offices where vibration serviceability may easily become the governing design criterion. The vibration serviceability issue in post-tensioned floors is now also recognised by the UK Concrete Society which proposed, for the first time, guidelines for performing a vibration serviceability check when

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19

Gray, Jody D. "In situ determination of strength and stiffness of structural lumber and composite products." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=2817.

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Thesis (M.S.)--West Virginia University, 2003.<br>Title from document title page. Document formatted into pages; contains xi, 154 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 112-122).

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20

Evenden, M. P. "Assessment of the cutting characteristics of coal seams by in situ testing methods." Thesis, University of Nottingham, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381170.

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21

Ehret, Steven J. "Instrumentation for anodization and in-situ testing of titanium alloys for capacitor anodes." Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1311612394.

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22

Arnegard, Matthew E. "Toxicant-releasing substrates : a new method for delivering copper to microbial communities in SITU /." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-12162009-020200/.

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23

Ashok, Mahima. "Analysis of HER2 testing in breast cancer." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29711.

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Thesis (Ph.D)--Biomedical Engineering, Georgia Institute of Technology, 2010.<br>Committee Chair: Griffin, Paul; Committee Member: Butera, Robert; Committee Member: Halpern, Michael; Committee Member: Nichols, Richard; Committee Member: Vidakovic, Brani. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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24

Salsbury, Duane. "In-situ testing of radiation effects on VLSI capacitors using the NPS linear accelerator." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1996. http://handle.dtic.mil/100.2/ADA326761.

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Thesis (M.S. in Electrical Engineering) Naval Postgraduate School, December 1996.<br>Thesis advisor(s): Sherif Michael. "December 1996." Includes bibliographical references (p. 95-96). Also Available online.

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25

Allan, Peter Gerard. "Development of a self-boring pressuremeter for the in situ testing of weak rocks." Thesis, University of Newcastle Upon Tyne, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238944.

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26

Ren, Zhe. "Nanomechanics : combining mechanical testing in situ with focused X-ray diffraction on a synchroton beamline." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4387.

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Les nanostructures ont des propriétés mécaniques qui diffèrent de celles des matériaux massifs. La compréhension des propriétés mécaniques aux échelles nanométriques requièrent la mise en place d’essais mécaniques combinés à des observations structurales. Au cours de cette thèse nous avons développé un microscope à force atomique (AFM) dédié permettant de solliciter mécaniquement un nano-objet unique sur une ligne de lumière synchrotron. Les possibilités offertes par cette nouvelle approche expérimentale sont démontrées sur deux exemples de sollicitation mécanique in situ: (i) la nanoindentati

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27

Ozyurt, Gokhan. "Cataloging And Statistical Evaluation Of Common Mistakes In Geotechnical Investigation Reports For Buildings On Shallow Foundations." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615084/index.pdf.

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Information presented in site investigation reports has a strong influence in design, project costs and safety. For this reason, both the quality and the reliability of site investigation reports are important. However in our country, geotechnical engineering is relegated to second place and site investigation studies, especially parcel-basis ground investigation works<br>do not receive the attention they deserve. In this study, site investigation reports, that are required for the license of design projects, are examined and the missing/incorrect site investigations, laboratory tests, geotech

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28

Ren, Zhe. "Nanomechanics : combining mechanical testing in situ with focused X-ray diffraction on a synchroton beamline." Electronic Thesis or Diss., Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4387.

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Les nanostructures ont des propriétés mécaniques qui diffèrent de celles des matériaux massifs. La compréhension des propriétés mécaniques aux échelles nanométriques requièrent la mise en place d’essais mécaniques combinés à des observations structurales. Au cours de cette thèse nous avons développé un microscope à force atomique (AFM) dédié permettant de solliciter mécaniquement un nano-objet unique sur une ligne de lumière synchrotron. Les possibilités offertes par cette nouvelle approche expérimentale sont démontrées sur deux exemples de sollicitation mécanique in situ: (i) la nanoindentati

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29

Foscan, Tiziana. "Mechanical characterization of double-wythe masonry walls with a view to in-situ testing methods." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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Unreinforced masonry is one of the most commonly used structure typologies for the construction of residential buildings, which is why the estimation of its mechanical parameters is of primary importance. The main techniques to acquire them are based on destructive methods, however less invasive tests have been studied in the past years in order to obtain the same parameters in-situ: the core testing method is one of those. While monotonic compression tests on single-wythe cores provided good results, tests performed on double-wythe cores have given a significant overestimation of the compress

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30

Chapman, Michael James. "Experimental determination of in-situ serviceability of Sitka spruce timber by ultrasonic non-destructive testing." Thesis, University of Ulster, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370087.

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31

Böhm, Jochen. "In situ tensile testing at the limits of X-ray diffraction a new synchrotron-based technique." Stuttgart Max-Planck-Inst. für Metallforschung, 2004. http://deposit.d-nb.de/cgi-bin/dokserv?idn=972182810.

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32

Lingwanda, Mwajuma. "In-situ Penetration as Alternative to Extensive Boreholes and Lab Testing for Exploration in Sandy Soils." Licentiate thesis, KTH, Jord- och bergmekanik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-161217.

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33

Fennessy, Michael Jim. "Development and testing of an instrument to measure estuarine floc size and settling velocity in situ." Thesis, University of Plymouth, 1994. http://hdl.handle.net/10026.1/1836.

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An instrument has been developed to observe the settling of individual flocs in turbid water in order to to measure size and settling velocity spectra of estuarine cohesive suspended sediments. INSSEV - IN Situ SEttling Velocity instrument - is bed mounted and comprises a computer controlled decelerator chamber that collects a sample of water from which some of the suspended matter is allowed to enter the top of a settling column. The settling flocs are viewed using a miniature video system. Subsequent analysis of video tapes provides direct measurements of size and settling velocity of indivi

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34

Grippo, Christian P. (Christian Patrick) 1969. "Design and manufacturing of a tensile text machine for in-situ atomic force microscope mechanical testing." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/89386.

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35

Evans, John T. IV. "DEVELOPMENT OF A METHOD FOR IN-SITU TESTING OF OXYGEN CONCENTRATIONS IN COMPOST BEDDED PACK BARNS." UKnowledge, 2015. http://uknowledge.uky.edu/bae_etds/30.

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Compost bedded pack barns are a relatively new type of dairy housing system that is being implemented in Kentucky. Extensive research has been done on the composting of animal manure, however, little has been done on composting animal manure in place. One of the most concerning challenges is aeration. Improper aeration can cause system failure. The ability to quickly and accurately measure the oxygen concentration would allow researchers the ability to determine which methods of tillage/aeration are most effective in compost bedded pack barns. The research in this thesis focused on the develop

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36

Glorian, Heinrich, Viktor Schmalz, Pawel Lochyński, et al. "Portable Analyzer for On-Site Determination of Dissolved Organic Carbon — Development and Field Testing." Molecular Diversity Preservation International (MDPI), 2018. https://tud.qucosa.de/id/qucosa%3A33327.

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Dissolved organic carbon (DOC) is a sum parameter that is frequently used in water analytics. Highly resolved and accurate DOC data are necessary, for instance, for water quality monitoring and for the evaluation of the efficiency of treatment processes. The conventional DOC determination methods consist of on-site sampling and subsequent analysis in a stationary device in a laboratory. However, especially in regions where no or only poorly equipped laboratories are available, this method bears the risk of getting erroneous results. For this reason, the objective of the present study was to se

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37

Watring, Dillon S. "Development of Novel, Microscale Fracture Toughness Testing for Adhesives." FIU Digital Commons, 2017. http://digitalcommons.fiu.edu/etd/3474.

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The purpose of this thesis was to develop microscale fracture toughness tests to be performed in situ based off previously used macroscale fracture toughness tests. The thesis also was to use these tests to perform in situ analysis and imaging of reinforced adhesives during crack propagation. Two different fracture toughness tests were developed for this thesis through developing fixtures and sample geometry. A microscale double cantilever beam (DCB) test was developed for mode I fracture (opening mode). A microscale end notch flexure (ENF) test was developed for mode II fracture (sliding mode

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38

de, Vaulx Thomas. "Determination of the first damage criterion of a glass/epoxy composite material using an in-situ test system." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/17608.

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39

Barrett, Anthony R. "Dynamic Testing of In-Situ Composite Floors and Evaluation of Vibration Serviceability Using the Finite Element Method." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/28879.

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The presented research examined three areas: best practices in high quality dynamic testing of in-situ floor systems, extensive dynamic testing of three bare (non-fit out) in-situ multi-bay steel composite floors to estimate their dynamic parameters/response and to identify trends in dynamic behavior, and development of a set of fundamental finite element (FE) modeling techniques to adequately represent the dynamic response of steel composite floors for the purpose of evaluating vibration serviceability. The measurement, analysis, and computation of a floor's accelerance frequency response fu

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40

Vennapusa, Pavana Kumar Reddy. "Investigation of roller-integrated compaction monitoring and in-situ testing technologies for characterization of pavement foundation layers." [Ames, Iowa : Iowa State University], 2008.

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41

Mehmannavaz, Reza. "A laboratory study on the development and testing of a bioaugmentation system for contaminated soils." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0028/NQ50221.pdf.

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42

Kemerling, Brandon L. "Development of a Weldability Testing Strategy for Laser Powder-Bed Fusion Applications." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu152380570674288.

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43

Butler, Joseph Edmund. "In-situ Fiber Strength Distribution in NextelTM 610 Reinforced Aluminum Composites." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/32433.

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MetPreg, a composite developed by Touchstone Research Laboratories (Tridelphia, WV), is an aluminum metal matrix composite reinforced by continuous NextelTM 610 alumina fibers. The question is, after processing, are the NextelTM fibers affected in any way that their strengthening contribution to the composite is reduced? From experimentation and statistical analysis, a strength distribution of pre-processed NextelTM 610 fibers is formed and an empirical correlation is developed relating strength to the observed flaw size on the failed single fibers. This correlation is then independently ap

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44

Meijer, Gerrit Johannes. "New methods for in situ measurement of mechanical root-reinforcement on slopes." Thesis, University of Dundee, 2016. https://discovery.dundee.ac.uk/en/studentTheses/c8857b54-36cb-4e68-83b1-cf1e78df30d9.

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Vegetation can increase the resistance of slopes against landsliding. The mechanical contribution of roots to the shear strength of the soil is however difficult to measure in situ. Existing methodologies are time-consuming and therefore not suitable to quantify spatial variability on the slope. Furthermore, some existing methods, for example large in situ shear box testing, can be difficult to apply on remote sites with difficult access, e.g. steep slopes. Therefore in this thesis novel, simple and portable methods to quantify mechanical root-reinforcement in the field were developed. The ‘bl

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45

Swett, Lauren J. "Seasonal Variations of Pavement Layer Moduli Determined Using In Situ Measurements of Pavement Stress and Strain." Fogler Library, University of Maine, 2007. http://www.library.umaine.edu/theses/pdf/SwettLJ2007.pdf.

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46

Hinterman, Eric Daniel. "System modeling, graphical user interface development, and sensors testing for the Mars Oxygen In-Situ Resource Utilization Experiment (MOXIE)." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119301.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 79-80).<br>The Mars Oxygen In-Situ Resource Utilization Experiment (MOXIE) represents the first time that NASA is demonstrating In-Situ Resource Utilization (ISRU) on the surface of another planetary body. MOXIE will produce oxygen from atmospheric CO 2 on Mars. It is being developed for NASA's 2020 Mars Rover and will produce greater than 99.6% pure oxygen through solid oxide electrolysis. MOXIE is roughly

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47

Ali, Arfan. "System modelling and testing of a magnetic susceptibility device and effect of downhole in-situ temperatures on magnetic susceptibility." Thesis, Heriot-Watt University, 2009. http://hdl.handle.net/10399/2232.

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Magnetic techniques have so far been under exploited in the petroleum industry. Recently scientists have published some results on laboratory based magnetic susceptibility data for reservoir rock minerals which show strong correlations with key petrophysical parameters including permeability. However, such laboratory based experiments are not representative of in-situ reservoir conditions. Part of this thesis investigates the in-situ magnetic properties of reservoir rocks and minerals at reservoir temperatures via laboratory experiments to model downhole conditions. The shapes of hysteresis cu

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48

Renner, Axel, Uwe Marschner, and Wolf-Joachim Fischer. "A new imaging approach for in situ and ex situ inspections of conductive fiber–reinforced composites by magnetic induction tomography." Sage, 2014. https://tud.qucosa.de/id/qucosa%3A35619.

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Fiber-reinforced plastics for industrial applications face constantly increasing demands regarding efficiency, reliability, and economy. Furthermore, it was shown that fiber-reinforced plastics with tailored reinforcements are superior to metallic or monolithic materials. However, a trustworthy description of the load-specific failure behavior and damage evolution of composite structures can hardly be given, because these processes are very complex and are still not entirely understood. Among other things, several research groups have shown that material damages like fiber fracture, delaminati

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49

Brewer, Michael D., and Michael D. Brewer. "Column Leaching Experiments and Mass Balance Modeling Simulating In-Situ Leaching within the Oxide Zone of the Florence Porphyry Copper Deposit, Pinal County, Arizona." Thesis, The University of Arizona, 1998. http://hdl.handle.net/10150/191367.

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Column leaching experiments were conducted to simulate in-situ leaching processes and to provide information on the mechanisms and extent of copper recovery, acid consumption, and chemical composition of recycled raffinate. Two 1.52-meter by 0.30-meter columns, each loaded with approximately 150 kilograms of copper oxide ore from the Florence porphyry copper deposit, were leached with a dilute sulfuric acid solution for 84 days. Computer simulation of the saturation state and aqueous mass transfer of predominant elements during the column tests was performed using EQ3NR, an aqueous solution sp

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Brashear, Kyle Thomas. "The Assessment of Sonic Waves and Tracer Gases as Non-Destructive Testing (NDT) Methods for In-Situ Underground Mine Seals." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/50519.

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Abstract:

Since the MINER Act of 2006, the minimum static load of in-situ underground mine seals has been increased from 20-psi to either 50-psi if monitoring is conducted or 120-psi if left unmonitored. These minimum strength requirements in seals must be designed, built, and maintained throughout the lifetime of the seal. Due to this, it has become necessary to assess the effectiveness of non-destructive testing (NDT) technologies to determine seal integrity, which in this case, are explored using sonic waves and tracer gases. Through both small and large scale testing, two NDT methods were evaluated

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