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Dissertations / Theses on the topic 'Plastics Compost'

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Published: 4 June 2021

Last updated: 16 February 2022

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1

Pickens, Mark Everett Vaidyanathan Vijay Varadarajan. "Design and validation of an automated multiunit composting system." [Denton, Tex.] : University of North Texas, 2009. http://digital.library.unt.edu/ark:/67531/metadc12184.

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2

Karamanlioglu, Mehlika. "Environmental degradation of the compostable plastic packaging material poly(lactic) acid and its impact on fungal communities in compost." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/environmental-degradation-of-the-compostable-plastic-packaging-material-polylactic-acid-and-its-impact-on-fungal-communities-in-compost(6caccf89-2f88-461c-999b-8d89c6be67e9).html.

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Conventional plastics have been used for decades in a diverse range of applications, however, many are resistant to degradation, leading to environmental pollution and their manufacture is dependent on non-renewable fossil fuels. Therefore, there has been an increasing need for eco-friendly biodegradable materials from renewable resources. Poly(lactic acid) (PLA) is a compostable polyester with a hydrolysable backbone that is susceptible to biodegradation and produced from renewable feedstocks. PLA has mechanical qualities comparable to non-biodegradable plastics, and currently is commercialized as food-packaging polymer for short shelf-life products. However, while PLA hydrolysis at elevated temperatures proceeds abiotically, ultimately releasing lactic acid and short chain oligomers, the role of microorganisms is unclear. Since PLA short-shelf life products are disposed after use, understanding the role of microorganisms and the effect of degradation on microbial populations in the environment is important. Therefore, the aims of this research was to (a) determine the relative importance of biotic and abiotic factors on PLA degradation; (b) to isolate putative fungal PLA degraders from the surface of PLA when buried in compost or soil and to test their ability to degrade PLA; (c) to assess the impact of PLA degradation on fungal communities when entering compost systems. The roles of abiotic and biotic factors in the degradation of high molecular weight PLA were investigated by comparing degradation rates in compost, soil and sterile water at temperatures of 25°, 37°, 45°, 50° and 55°C. Tensile strength loss and molecular weight decline of PLA in microorganism-rich compost and soil were greater than chemical hydrolysis in sterile water at elevated temperatures (above 45°C) indicating microorganisms can directly enhance PLA degradation. Since extensive fungal growth was observed on the surface of PLA when buried in compost and soil, putative fungal PLA degraders were isolated from PLA surface and their community profile on PLA surface was compared with the compost and soil community with a molecular method, terminal restriction fragment polymorphism (TRFLP). Among the identified fungi, Thermomyces lanuginosus was the dominant isolate recovered and shown to enhance PLA degradation in compost at 50°C. The fungal community profile on PLA surface was different than the fungal profile in compost and soil suggesting enrichment for PLA degraders on the surface of PLA. In order to determine the impact of PLA degradation on the fungal compost community, two different high molecular weight PLA sources, films and granules were buried in compost at 10%, 25% and 50% (w/w) concentration for 4 months at 25°C and 50°C and the community profile analysed by TRFLP and pyrosequencing. TRFLP revealed that when PLA did not degrade, the fungal community shifted back toward the initial compost community profile, however, when PLA degraded to its monomers releasing lactic acid at 50°C at a concentration of 50% (w/w) it changed the fungal community profile and decreased the fungal diversity. Pyrosequencing revealed that the presence of PLA enriched for Thermomyces in the compost population over time.

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3

Pickens, Mark Everett. "Design and Validation of an Automated Multiunit Composting System." Thesis, University of North Texas, 2009. https://digital.library.unt.edu/ark:/67531/metadc12184/.

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This thesis covers the design of an automated multiunit composting system (AMUCS) that was constructed to meet the experimental apparatus requirements of the ASTM D5338 standard. The design of the AMUCS is discussed in full detail and validated with two experiments. The first experiment was used to validate the operation of the AMUCS with a 15 day experiment. During this experiment visual observations were made to visually observe degradation. Thermal properties and stability tests were performed to quantify the effects of degradation on the polymer samples, and the carbon metabolized from the degradation of samples was measured. The second experiment used the AMUCS to determine the effect of synthetic clay nanofiller on the aerobic biodegradability behavior of poly (3-hydroxybutyrate-co-3-hydroxyvalerate).

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4

Sequeira, Liliana Lopes. "Compostagem de resíduos sólidos urbanos e avaliação da qualidade dos produtos obtidos - caso de estudo Amarsul S.A." Master's thesis, ISA, 2013. http://hdl.handle.net/10400.5/6130.

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Mestrado em Engenharia do Ambiente - Tecnologias Ambientais - Instituto Superior de Agronomia
The composting has proven a good alternative in the management, treatment and valorization of municipal solid waste. Depending on the raw materials used for its production, the product may be considered organic fertilizer/corrective to be used in agriculture activities. The present work was developed aiming the evaluation of the MSW composting evolution, by the determination of physical, physical-chemical and biological parameters, in biomass collected along the process, as well as the assessment of stability/maturation degree of the final compost. For each collected sample it was also introduced two different types of biodegradable/compostable plastics, each sample corresponding to a particular phase of stability/curing of composting process in order to evaluate the influence of these plastics in the samples that was obtained and the possible occurrence of biodegradation of plastics in the several phases analyzed. The results showed that the parameters fulfilled the existing literature, allowing the compound the designation of matured/stabilized. The biological characterization of the final compost showed that it presents phytotoxicity, which fact is related to the presence of ammoniacal nitrogen and high electrical conductivity. The introduction of biodegradable plastics in the process didn’t affect any parameter analyzed, showing increasing degree of biodegradability over the course of analysis.

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5

Dura, Matthew Jonathon. "Behavior of Hybrid Wood Plastic Composite-Fiber Reinforced Polymer Structural Members for Use in Sustained Loading Applications." Fogler Library, University of Maine, 2005. http://www.library.umaine.edu/theses/pdf/DuraMJ2005.pdf.

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6

Souza, Benjamin J. "Fracture Mechanics Characterization of WPC-FRP Composite Materials Fabricated by the Composites Pressure Resin Infusion System (Compris) Process Volume I (Chapters 1-7, Appendix A)." Fogler Library, University of Maine, 2005. http://www.library.umaine.edu/theses/pdf/SouzaBJ2005.pdf.

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7

Adhikary, Kamal Babu. "Development of Wood Flour-Recycled Polymer Composite Panels As Building Materials." Thesis, University of Canterbury. Chemical and Process Engineering, 2008. http://hdl.handle.net/10092/1795.

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Wood plastic composites (WPCs) were made using matrices of recycled high-density polyethylene (rHDPE) and polypropylene (rPP) with sawdust (Pinus radiata) as filler. Corresponding WPCs were also made using virgin plastics (HDPE and PP) for comparison with the recycled plastic based composites. WPCs were made through melt compounding and hot-press moulding with varying formulations based on the plastic type (HDPE and PP), plastic form (recycled and virgin), wood flour content and addition of coupling agent. The dimensional stability and mechanical properties of WPCs were investigated. Durability performances of these WPCs were studied separately, by exposing to accelerated freeze-thaw (FT) cycles and ultraviolet (UV) radiation. The property degradation and colour changes of the weathered composites were also examined. Dimensional stability and flexural properties of WPCs were further investigated by incorporation of nanoclays in the composite formulation. To understand the changes in WPCs stability and durability performance, microstructure and thermal properties of the composites were examined. Two mathematical models were developed in this work, one model to simulate the moisture movement through the composites in long-term water immersion and the other model to predict the temperature profile in the composites during hot-press moulding. Both rHDPE and rPP matrix based composites exhibited excellent dimensional stability and mechanical properties, which were comparable to those made from virgin plastics. Incorporation of maleated polypropylene (MAPP) coupling agent in composite formulation improved the stability and the mechanical properties. The incorporation of 3 wt. % MAPP coupling agent to WPCs showed an increase in tensile strength by 60% and 35 %, respectively, for the rHDPE based and rPP based composites with 50 wt. % wood flour. Scanning electron microscopy (SEM) images of the fractured surfaces of WPCs confirmed that the MAPP coupling improved the interfacial bonding between the plastic and the wood filler for both series of composites. Long-term water immersion tests showed that the water transport mechanism within the WPCs follows the kinetics of Fickian diffusion. Dimensional stability and flexural properties of the WPC were degraded after 12 accelerated FT cycles as well as 2000 h of UV weathering for both recycled and virgin HDPE and PP based composites. However, the MAPP coupled composites had improved stability and flexural property degradation. The surface of the weathered composites experienced a colour change, which increased with the exposure time. The MAPP coupled composites exhibited less colour change as compared to non-coupled composites. Regarding the effect of the plastic type, the PP based composites experienced higher colour change than those based on HDPE. With weathering exposure, flexural strength and stiffness of the WPCs were decreased, but elongation at break was increased regardless of plastic type and wood flour content. MAPP coupled rPP and rHDPE based UV weathered WPCs lowered the degradation of stiffness by 50% and 75%, respectively compared to non-coupled WPCs. SEM images of the fractured surfaces of FT and UV weathered WPCs confirmed a decrease in the interfacial bonding between the wood flour and matrix. Thermal properties of weathered composites changed with weathering, but the extent of the changes depended on WPCs formulation and matrix type. From the experimental studies on nanoclay-filled rHDPE composites, it is found that stability, flexural properties of WPCs could be improved with an appropriate combination of coupling agent, and nanoclay contents processed by melt blending. Incorporation of 1-5 wt. % nanoclay in the maleated polyethylene (MAPE) coupled wood plastic composite improved the dimensional stability and flexural properties. The thermal properties changed with the addition of nanoclay and MAPE in WPCs. In this work, a hot press-moulding model was proposed based on the one-dimensional transient heat conduction to predict the temperature profile of the WPCs during hot pressing cycle. The results from this work clearly show that rHDPE and rPP can be successfully used to produce stable and strong WPCs, which properties and performances are similar to or comparable to composites made of wood and virgin plastics. Therefore, WPCs based on recycled PP and HDPE matrix could have potential to use as construction materials.

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8

Ball, Ryan. "Experimental analysis of composite reinforced concrete beams." Ohio : Ohio University, 1998. http://www.ohiolink.edu/etd/view.cgi?ohiou1177002341.

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9

Butt, Arif. "Resin flow characterization during thermoplastic composite consolidation." Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/12010.

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10

Wang, Xuhui. "Heat transfer in composite prepreg tapes." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63880.

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11

Shi, Yibing. "Barely visible impact damage in polymer composite laminates." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334270.

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12

Thielman, Scott C. "Design and optimization of a material property distribution in a laminated composite flywheel /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/7031.

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13

Hong, Yong. "Fatigue and Fracture of the FRP-Wood Interface: Experimental Characterization and Performance Limits." Fogler Library, University of Maine, 2003. http://www.library.umaine.edu/theses/pdf/HongY2003.pdf.

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14

Jones, Nicola. "The pyrolysis of composite plastic waste." Thesis, University of Leeds, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396746.

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15

Smith, P. "Aspects of the static and fatigue behaviour of composite laminates, including bolted joints." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372919.

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16

Speake, Stephen David. "Prediction of the rate of degradation of a polyester glass composite by water." Thesis, Kingston University, 1986. http://eprints.kingston.ac.uk/20509/.

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17

Lutz, Ernst. "Design and analysis of a composite wire-socket attachment." Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06062008-164322/.

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18

Damiani, Thomas Miles. "A model to predict the long-term strength of e-glass fiber composites subjected to environmental exposure." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1517.

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Thesis (M.S.)--West Virginia University, 2000.
Title from document title page. Document formatted into pages; contains xiii, 86 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 81-84).

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19

Slaughter, Andrew Edward. "Design and fatigue of a structural wood-plastic composite." Online access for everyone, 2004. http://www.dissertations.wsu.edu/Thesis/Summer2004/a%5Fslaughter%5F072704.pdf.

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20

Yan, Jia-Hau. "Elastic-plastic fracture mechanics of compact bone." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011641.

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21

Shady, Ebraheen Hassan E. H. Gowayed Yasser. "Stress mapping of textile composite materials and its application in interfacial shear behavior." Auburn, Ala., 2005. http://hdl.handle.net/10415/1272.

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22

Bartus, Shane D. "Simultaneous and sequential multi-site impact response of composite laminates." Birmingham, Ala. : University of Alabama at Birmingham, 2006. http://www.mhsl.uab.edu/dt/2006p/bartus.pdf.

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Thesis (Ph. D.)--University of Alabama at Birmingham, 2006.
Additional advisors: James S. Davidson, Derrick R. Dean, Gregg M. Janowski, Mark L. Weaver. Description based on contents viewed Jan. 24, 2007; title from title screen. Includes bibliographical references (p. 235-246).

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23

Nayfeh, Jamal Faris. "Nonlinear dynamics of composite plates and other physical systems." Diss., This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-07282008-135756/.

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24

Jinka, Chandra Sekhar. "Dynamic response evaluation of fiber reinforced composite bridge decks and bridges." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=3182.

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Thesis (M.S.)--West Virginia University, 2003.
Title from document title page. Document formatted into pages; contains xvi, 167 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 144-148).

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25

Alvarez-Valencia, Daniel. "Structural Performance of Wood Plastic Composite Sheet Piling." Fogler Library, University of Maine, 2009. http://www.library.umaine.edu/theses/pdf/AlvarezValenciaD2009.pdf.

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26

An, Wei 1963. "Strengthening of concrete beams with composite plastic plates." Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/277246.

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This study investigates the feasibility of strengthening reinforced concrete beams with epoxy-bonded Glass-Fiber-Reinforced-Plastic (GFRP) plates. The composite plate is epoxy-bonded to the tension flange of the beam to increase its stiffness and strength. Seven rectangular and one T-beam, retrofitted with composite plates, were tested to failure under symmetrical 4-point bending. The load versus deflection and the load versus strain in the composite plate, steel rebar and the extreme compression fiber of concrete were measured and plotted for the midspan section throughout the entire range of loading up to failure. Analytical models based on the equilibrium of forces and compatibility of deformations were developed to predict the stresses and deformations of the beam in the linear and nonlinear regions. The predicted and measured results correlated well. The analytical models were used in a parametric study to investigate the effects of design variables such as, plate area, plate strength and stiffness, reinforcement ratio, etc., on the moment-curvature relationships of typical rectangular and T cross sections.

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27

Kim, Sungmin Mech E. Massachusetts Institute of Technology. "A study on cork-based plastic composite material." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/68899.

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Thesis (Mech. E.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2011.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 115-116).
Sandwich panels are mainly used in construction for lightweight structures since their concept is appropriate due to extremely high in-plane and flexural stiffness to weight ratios. However, low structural freedom and high environmental burdens of core material in sandwich panels such as fiberglass, and chemically synthesized foams have retarded a wide use in various areas. Recently it has been suggested that the better performance and economic, environmental benefits could be possibly achieved by using hybrid sandwich panels comprising non-traditional pairs of materials for sandwich panels. Therefore, in this paper, a cork-based plastic composite material has been proposed as a new core material and the possibility for substituting existing core materials have been explored by investigation on its mechanical properties, economic benefit, and environmental impact. Several mechanical testing were carried out on the cork composite and Glass Fiber Reinforced Plastic (GFRP) to determine the mechanical properties and compare their relative performances. By conducting property-limited design cases with the obtained mechanical properties, how they will perform in light, stiff panel application was investigated. Economic analysis was demonstrated with a table top application by using rigidity equality condition. Finally, Eco-impact of the cork composite was investigated by conducting Life Cycle Assessment. The result proved that the cork composite is competitive with other core materials.
by Sungmin Kim.
Mech.E.

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28

Gandhe, Gajanan V. "Impact response of interleaved composite materials." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43859.

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The need for better impact resistant composites has resulted in the development of many toughened resin systems. A combination of a tougher resin system along with higher strength fibers increases the impact resistance of the composite. The use of an adhesive layer between two plies of the improved prepreg system has been found to considerably increase the impact resistance. This concept is known as "Interleafing." This investigation studies the response of the interleaf materials to instrumented drop weight impact as compared with the response of non-interleaved materials. Two non-destructive quality evaluation techniques, namely, ultrasonics and eddy currents, are used to qualitatively evaluate the damage developed in the specimens. Several different energy levels of damage are studied. The interleaved laminate had significantly better impact response than the non-interleaved laminate for the same impact energy. The onset of delamination was delayed by the use of the interleaf. Whereas damage could be detected at an impact energy as low as 1.75 ft-lb in the baseline laminate; the interleaved laminate did not show any ultrasonic C-scan indication up to an impact of 2.45 ft-lb. The increase of delamination with increasing impact energy was slower in the interleaved specimen. The eddy current method is not effective in detecting damage in the interleaved laminate because of the shielding effect of the interleaf. Compression Strength After Impact (CSAI) could not be used for the test laminates in this project, but the Tensile Strength After Impact test provided useful results. The tensile strength after impact of the interleaved specimen was between 20%-80% more than the baseline laminate up to impact energy of 10 ft-lb. The advantage of the interleaved specimen reduced at higher energy levels of impact.
Master of Science

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29

Carruthers, Joseph John. "Some aspects of the energy absorption of composite materials." Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267188.

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30

Bangalore, Gurudutt S. "Nondestructive evaluation of FRP composite members using infrared thermography." Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2419.

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Thesis (M.S.)--West Virginia University, 2002.
Title from document title page. Document formatted into pages; contains viii, 101 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 98-101).

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31

Punyamurthula, Deepthi. "Structural performance of low-profile FRP composite celluar modules." Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3815.

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Thesis (M.S.)--West Virginia University, 2005
Title from document title page. Document formatted into pages; contains xi, 91 p. : ill. (some col.) Includes abstract. Includes bibliographical references (p. 83-85).

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32

Leach, David W. "An experimental study of the processing parameters in thermoplastic filament winding." Thesis, Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/16030.

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33

Gabertan, Michael Yandoc. "A comparison of woven fiber composite models to determine coefficients of thermal expansion." Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/17309.

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34

Eisenheld, Leopold. "Measuring the Adhesive Bond Quality of Vinyl Ester-Glass Composites on Novolak HMR Treated Wood." Fogler Library, University of Maine, 2003. http://www.library.umaine.edu/theses/pdf/EisenheldL2003.pdf.

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35

Thibodeau, Elisabeth Gabrielle. "Static and Fatigue Fracture Characterization of Primary and Secondary Bonded Woven E-Glass Composites." Fogler Library, University of Maine, 2007. http://www.library.umaine.edu/theses/pdf/ThibodeauEG2007.pdf.

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36

Schleinitz, Armin, Sven Eichhorn, and Christine Schubert. "Hängefördersystem mit Trag- und Gleitelement aus Wood Plastic Composite (WPC)." Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-230689.

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Erneuerbare Werkstoffe (z.B. WPC) können metallische substituieren, indem eine Kombination aus technischen, wirtschaftlichen und ökologischen Vorteilen in Bauweise und Bauteilen in der Intralogistik Anwendung finden. Vorgestellt werden die wichtigsten Schritte zur Entwicklung eines Hängefördersystems mit einem Trag- und Gleitprofil aus WPC. Schwerpunkte sind die Verbindungsstellen, die Kurvensegmente und die Weiche. Es erfolgt eine Beurteilung der Gebrauchstauglichkeit des Gesamtsystems.

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37

Brown, Jessica H. "A machine system for the rapid production of composite structures." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/19452.

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38

Wagner, Matthew L. "An investigation of fiber reinforced recycled plastic/composite railroad crossties." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/19571.

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39

Lombardi, John Lang 1968. "Injection solid freeforming of polymer and ceramic composite materials." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/282251.

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Solid freeform fabrication processes (SFF) have been the subject of much research and discussion within recent years. Unlike other near net shape manufacturing processes (i.e. conventional injection molding, casting, or bulk machining), SFF techniques fabricate parts "from the ground up" by the sequential deposition and curing of raw material slurry layers upon each other until the final part results. Precise spatial control of deposited layers is achieved through CAD software and hardware interfaced with the SFF apparatus. The development of suitable SFF compatible raw material formulations and appropriate processing parameters are discussed in this dissertation. In particular, a wide range of materials have been fabricated and characterized at AML and ACR using this technique including alumina., crosslinked acrylate, and high molecular weight Nylon 6 thermoplastics. Comparisons are made between the mechanical properties of the SFF and corresponding commercial conventionally processed materials. Finally, the heat transfer and polymerization kinetics associated with three model SFF resin formulations are discussed and compared to corresponding empirical SFF process observations.

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40

Chen, Lee-Wen. "Extrudable melamine resin for wood plastic composites." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Summer2009/L_Chen_071709.pdf.

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Thesis (M.S. in civil engineering)--Washington State University, August 2009.
Title from PDF title page (viewed on Aug. 10, 2009). "Department of Civil and Environmental Engineering." Includes bibliographical references.

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41

Meyer, David Gilbert. "Industrial plastics technologist's duties and tasks to meet employer needs in the greater Dayton, Ohio area." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1222033831.

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42

Li, Wei 1970 May 26. "Yield and geodesic properties of random elasto-plastic materials." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115877.

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Two topics, i.e., the scale effects and the geodesics of random heterogeneous materials will be discussed in this work.
When the separation of scales in random media does not hold, the representative volume element (RVE) of deterministic continuum mechanics does not exist in the conventional sense, and new concepts and approaches are needed. This subject is discussed here in the context of microstructures of two types - planar random chessboards, and planar random inclusion-matrix composites -- with microscale behavior being elastic-plastic-hardening (power-law). The microstructure is assumed to be spatially homogeneous and ergodic. Principal issues under consideration are those of yield and incipient plastic flow of statistical volume elements (SVE) on mesoscales, and the scaling trend of SVE to the RVE response on macroscale. Indeed, the SVE responses under uniform displacement (or traction) boundary conditions bound from above (respectively, below) the RVE response, and we show via extensive simulations in plane stress that the larger is the mesoscale, the tighter are both bounds. However, the mesoscale flows under both kinds of loading do not, in general, display normality. Also, with the limitation imposed by currently available computational resources, we do not recover normality (or even a trend towards it) when studying the largest possible SVE domains.
The second topic is the geodesic (i.e., shortest path) character of strain fields occurring in elasto-plastic response of planar inclusion-matrix composites. The composites' spatially random morphology is created by generating the disk centers through a sequential inhibition process based on a poisson point field in plane. Both phases (inclusions and matrix) are elastic-plastic-hardening with the matrix being more compliant and weaker than the inclusions, and perfect bonding everywhere. A quantitative comparison of a response pattern obtained by computational micromechanics with that found only by mathematical morphology indicates that (i) the regions of plastic flow are very close to geodesics, and (ii) a purely geometric, and orders of magnitude more rapid than by computational mechanics assessment of these regions is possible.

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43

Munagala, Praveenkumar. "Fatigue life prediction of GFRP composite material at coupon and component level." Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4437.

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Thesis (M.S.)--West Virginia University, 2005.
Title from document title page. Document formatted into pages; contains xi, 101 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 84-89).

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44

Augustine, Steven. "Sound Attenuation Performance of Fiber-reinforced Polymer Composite Circumaural Hearing Protection Devices." Thesis, University of South Florida, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1595804.

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Personnel who work on the flight deck of an aircraft carrier are exposed to extreme levels of jet engine noise often in excess of 140 decibels (dB). The current circumaural hearing protective devices (CAHPD) employed by flight deck crewmen are inadequate for the level of protection required for these extreme levels of noise. Fiber-reinforced thermoset polymer composite (FRPC) materials such as aramid fibers used in body armor, have high theoretical values of acoustic impedance due to a fundamentally high modulus of elasticity and may offer a superior level of hearing protection over original equipment (OE) thermoplastic CAHPDs. The objective of this project was to measure and evaluate the attenuation of CAHPD’s constructed from FRPC materials. FRPC CAHPD ear cups were paired with OE thermoplastic CAHPD ear cups of equal shape and thickness, and the protected and unprotected A-weighted sound pressure level (SPL) was measured in continuous and impulse noise environments >80 dBA using a JOLENE manikin. These data were evaluated for paired differences between the protected and unprotected mean SPL, and OE protected and FRPC protected mean SPL and indicates that OE thermoplastic CAHPDs provide greater sound attenuation of continuous noise >80 dBA and aramid FRPC CAHPDs provide greater sound attenuation of impulse noise >80 dBA.

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45

Vasudevan, Archana. "Application of digital infrared thermography for nondestructive evaluation of composite bridge components." Morgantown, W. Va. : [West Virginia University Libraries], 2004. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3347.

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Thesis (M.S.)--West Virginia University, 2004.
Title from document title page. Document formatted into pages; contains ix, 217 p. : ill. (some col.), col. maps. Includes abstract. Includes bibliographical references (p. 213-217).

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QUINI, JOSUE G. "Adesivos estruturais uretânicos aplicados a combinações de compósitos plásticos e metais." reponame:Repositório Institucional do IPEN, 2011. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9995.

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Made available in DSpace on 2014-10-09T12:33:38Z (GMT). No. of bitstreams: 0
Made available in DSpace on 2014-10-09T14:04:04Z (GMT). No. of bitstreams: 0
Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP

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Cameron, Tony Ray. "Alaskan timber resources for wood-plastic composites." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Summer2009/t_cameron_070209.pdf.

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Thesis (M.S. in civil engineering)--Washington State University, August 2009.
Title from PDF title page (viewed on Aug. 12, 2009). "Department of Civil and Environmental Engineering." Includes bibliographical references.

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Tascioglu, Cihat. "Impact of Preservative Treatments and Fungal Exposure on Phenolic Fiber Reinforced Polymer (FRP) Composite Material Utilized in Wood Reinforcement." Fogler Library, University of Maine, 2002. http://www.library.umaine.edu/theses/pdf/TasciogluC2002.pdf.

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Weaver, Craig Aaron. "Behavior of FRP-Reinforced Glulam-Concrete Composite Bridge Girders." Fogler Library, University of Maine, 2002. http://www.library.umaine.edu/theses/pdf/WeaverCA2002.pdf.

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Luk, Herman Chi Yung. "FRP-strengthened beam : interfacial failure and development of empirical design approach /." View Abstract or Full-Text, 2002. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202002%20LUK.

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Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2002.
Includes bibliographical references (leaves 216-222). Also available in electronic version. Access restricted to campus users.

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