Thematische Bibliographien / Spallings

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Auswahl der wissenschaftlichen Literatur zum Thema „Spallings“

Autor: Grafiati

Veröffentlicht am 25. Juni 2021

Zuletzt aktualisiert am 29. Juli 2025

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Zeitschriftenartikel zum Thema "Spallings"

Lee, Chang Soon, In Shik Cho, Young Shik Pyoun, and In Gyu Park. "Study of Inner Micro Cracks on Rolling Contact Fatigue of Bearing Steels Using Ultrasonic Nano-Crystalline Surface Modification." Key Engineering Materials 462-463 (January 2011): 979–84. http://dx.doi.org/10.4028/www.scientific.net/kem.462-463.979.

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The purpose of this study is to analyze the effect of ultrasonic nano-crystalline surface modification (UNSM) treatment on rolling contact fatigue (RCF) characteristics of bearing steels. It was found that severe plastic deformation occurred at surface by over 100 µm after UNSM treatment. The micro surface hardness was increased by 18%, and the measured compressive residual stress was as high as -700~-900MPa. The polymet RCF-2 roller type RCF test showed over 2 times longer fatigue lifetime after UNSM treatment under Hertzian contact stress of 425.2kg/mm2 and 8,000 rpm. And SEM study showed a

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Ai, Alan Xiaolan, and Herbert S. Cheng. "Numerical Simulation of Elastohydrodynamically Lubricated Contacts With Rough Surfaces." Applied Mechanics Reviews 47, no. 6S (1994): S221—S227. http://dx.doi.org/10.1115/1.3124411.

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Transient numerical analysis to elastohydrodynamically lubricated point contacts with rough surfaces is described. The numerical simulation is based on the multigrid method. Three types of surface roughness: single dent or bump, oblique waviness and random roughness are reviewed. Under heavily loaded conditions, results reveal a strong domination of Couette flow (convective flow). The presence of sliding greatly increases pressure fluctuation and as a consequence may lead to surface-initiated spallings. For obliquely orientated roughness, lubricant flow intends to deform the ridges and create

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Hu, Pan, Haitao Wang, Guiyun Tian, Zeyu Dong, Fasheng Qiu, and Billie F. Spencer. "Wireless Localization of Spallings in Switch-Rails With Guided Waves Based on a Time–Frequency Method." IEEE Sensors Journal 19, no. 23 (2019): 11050–62. http://dx.doi.org/10.1109/jsen.2019.2934159.

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Franke, L., and R. Reimann-Oenel. "Beobachtungen zum Stofftransport und zu einhergehenden Schädigungseffekten in porösen Baustoffen / Observations of mass transport and related deterioration mechanisms in porous building materials." Restoration of Buildings and Monuments 6, no. 4 (2000): 451–62. http://dx.doi.org/10.1515/rbm-2000-5492.

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Abstract It is reported about substance migration problems and their consequences, which have been investigated experimentally and which could be particularly relevant with regard to repair and restoration of historic buildings. One aim of the investigations was to find out, whether facades, treated with water repellent agents, showing non treated areas, can be affected in their long time behaviour. Such lacks can be due to non careful application of the repellent agent. In addition, investigations were made to find out. of coatings on salt containing mineral substrates, especially natural sto

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Knowles, M. K., F. D. Hansen, T. W. Thompson, J. F. Schatz, and M. Gross. "Review and perspectives on spallings release models in the 1996 performance assessment for the Waste Isolation Pilot Plant." Reliability Engineering & System Safety 69, no. 1-3 (2000): 331–41. http://dx.doi.org/10.1016/s0951-8320(00)00037-5.

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Berglund, J. W., J. W. Garner, J. C. Helton, J. D. Johnson, and L. N. Smith. "Direct releases to the surface and associated complementary cumulative distribution functions in the 1996 performance assessment for the Waste Isolation Pilot Plant: cuttings, cavings and spallings." Reliability Engineering & System Safety 69, no. 1-3 (2000): 305–30. http://dx.doi.org/10.1016/s0951-8320(00)00036-3.

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Hadinata, Patrick Nicholas, Djoni Simanta, Liyanto Eddy, and Kohei Nagai. "Multiclass Segmentation of Concrete Surface Damages Using U-Net and DeepLabV3+." Applied Sciences 13, no. 4 (2023): 2398. http://dx.doi.org/10.3390/app13042398.

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Monitoring damage in concrete structures is crucial for maintaining the health of structural systems. The implementation of computer vision has been the key for providing accurate and quantitative monitoring. Recent development uses the robustness of deep-learning-aided computer vision, especially the convolutional neural network model. The convolutional neural network is not only accurate but also flexible in various scenarios. The convolutional neural network has been constructed to classify image in terms of individual pixel, namely pixel-level detection, which is especially useful in detec

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Guo, Y. S. H., Wei Shen Zhu, Shu Cai Li, R. H. C. Wong, and B. Sin. "Growth Pattern Study of Closed Surface Flaw under Compression." Key Engineering Materials 353-358 (September 2007): 158–61. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.158.

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Under extra compressive stress, some phenomena of rock spallings and fractures often exist on rock mass located in sidewalls of underground house and tunnels. It is the reason that the crack growth and coalescence initiation from original flaws (or faults) in rock mass. In the previous studies, many researchers took a flaw as a through flaw (2-dimentional model), but the flaws are not always through the whole rock mass in fact, most of them are only near the surface of rock mass, These are so named as surface flaws. They belong to three dimensional (2-D) flaws. Now, the reports on initiation a

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Kuznetsov, R. V., V. E. Kormyshev, V. E. Gromov, Yu F. Ivanov, and Yu A. Shlyarova. "Transformation of structural-phase states in rail head at extremely long-term operation." Izvestiya. Ferrous Metallurgy 65, no. 3 (2022): 209–15. http://dx.doi.org/10.17073/0368-0797-2022-3-209-215.

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Quantitative transformations of the structure at a depth of 0, 2, 5, 10 mm along the central and symmetry axis of the fillet of long differentially quenched rails head after extremely long-term operation (passed tonnage of 1770 mln. gross tons) were identified at macro-, micro- and nanoscale levels by methods of optical, scanning and transmission electron diffraction microscopy. At a macroscale level, the numerous shallow parallel cracks of contact fatigue are detected on the surface of working fillet, and on the surface of inoperative fillet there are only small spallings. The lateral wear of

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Kong, Xiangxi, Ye Yuan, Shuai Sun, Yi Xin, and Qiang Meng. "Time-Varying Meshing Stiffness Calculation and Dynamics Simulation of Multi-Spalling Gear." Machines 13, no. 4 (2025): 299. https://doi.org/10.3390/machines13040299.

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Spalling alters a gear’s time-varying meshing stiffness (TVMS), thereby affecting its vibration characteristics. However, most studies focus on single-spalling gears and overlook the possibility of multi-spalling gears. Additionally, because most spalls are irregular, traditional analytical models neglect the torsional effects that are caused by asymmetric spalling. In this study, a shape-independent model for calculating the TVMS of multi-spalling gears, which considers torsional stiffness, was developed. A 16-degree-of-freedom dynamic model was established to analyze the dynamic response, in

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Dissertationen zum Thema "Spallings"

Darth, Pontus. "Simulation of Rolling Mill to Computeand Improve Load Distribution." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-85595.

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This master thesis was done at Swerim AB in cooperation with SSAB and the Technical University of Luleå in the purpose of preventing spalling problems in hot rolling mills. Spallings are a fatigue damage that occurs on the rolls due to extreme loads and unfavorable conditions between the rolls in a mill. This report describes how the roughing mill, which is the first of a series of hot rolling mills is modelled and simulated in order to compute and improve the load distribution between the rolls. The load distribution tells a lot where the spalling problems occurs. By computer aided design and

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MOTTA, BERNARDO HEISLER. "THE CONTEMPORARY NARRATIVE AND INTERACTIVE DIGITAL TECHNOLOGIES: SPALLING, DECENTRALIZATION, SLIDING AND MULTIPLICATION OF CHARACTERS` SPALLING." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=7661@1.

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FUNDAÇÃO DE APOIO À PESQUISA DO ESTADO DO RIO DE JANEIRO<br>Essa pesquisa tem como objetivo analisar a descentralização, fragmentação, deslizamento e multiplicação da identidade dos personagens na ficção literária e cinematográfica contemporânea. A hipótese que norteia o trabalho é a de que estas transformações, na forma em que vêm se apresentando, estão intimamente relacionadas a um outro fenômeno, decorrente das possibilidades criadas pelas novas tecnologias digitais, o da interatividade. Assim, a pesquisa debruça-se sobre a inter-relação entre as narrativas de ficção digitais e as na

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Connolly, Raymond J. "The spalling of concrete in fires." Thesis, Aston University, 1995. http://publications.aston.ac.uk/14310/.

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The occurrence of spalling is a major factor in determining the fire resistance of concrete constructions. The apparently random occurrence of spalling has limited the development and application of fire resistance modelling for concrete structures. This Thesis describes an experimental investigation into the spalling of concrete on exposure to elevated temperatures. It has been shown that spalling may be categorised into four distinct types, aggregate spalling, corner spalling, surface spalling and explosive spalling. Aggregate spalling has been found to be a form of shear failure of aggregat

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Jansson, Robert. "Fire Spalling of Concrete : Theoretical and Experimental Studies." Doctoral thesis, KTH, Betongbyggnad, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-128378.

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Fire spalling of concrete is not a new phenomenon. To some degree there has always been a risk during rapid heating of concrete. Therefore, to a certain degree the effect of fire spalling is included in the bank of data from fire tests and fires on which our understanding of the fire resistance of concrete is based. However, the development and modern use of more dense concrete mixes have produced cases of very severe fire spalling which have increased the urgency to understand this phenomenon. In this context, the use of an addition of polypropylene (PP) fibres to the mix to limit the amount

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Nguyen, Thang Dinh. "Theoretical study of thermal spalling of brittle materials." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/77905.

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In this work several problems related to thermal spalling are considered. First, a novel approximate technique to solve general linear heat-conduction problems with changing boundary conditions and locations is proposed. The technique is based on the concept of linear superposition and the possibility to transform the initial condition into a time-varying boundary condition. The proposed technique is evaluated and compared_to some of the existing techniques. The individual contribution of several stress components and their combined effects on the risk of failure are then considered for a theo

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Jansson, Robert. "Material properties related to fire spalling of concrete /." Lund : Division of Building Materials, Lund Institute of Technology, Lund University, 2008. http://www.byggnadsmaterial.lth.se/.

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Jerabek, Jakub, Allessandra Keil, Jens Schoene, Rostislav Chudoba, Josef Hegger, and Michael Raupach. "Experimental and Numerical Analysis of Spalling Effect in TRC Specimens." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1244046893347-05461.

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The paper presents the study of spalling effect occurring under tensile loading in thin-walled TRC specimens. The experimentally observed failure patterns are first classified and the performed experiment design is explained and discussed. A parameter study of spalling effect with varied thickness of concrete cover and reinforcement configurations including both the textile fabrics and the yarns provided the basis for numerical analysis of the effect. The applied numerical model was designed in order to capture the initiation and propagation of longitudinal cracks leading to the separation of

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Thiruchelvam, Chellathurai. "Deterioration and spalling of high strength concrete at elevated temperatures." Thesis, City University London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274476.

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Lopes, Christian Raposo. "Spalling e DoP em alvos metálicos : estudos analíticos e numéricos." Master's thesis, Universidade de Aveiro, 2009. http://hdl.handle.net/10773/2493.

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Mestrado em Engenharia Mecânica<br>As constantes formas de ameaça requerem o desenvolvimento constante de mecanismos de protecção, capazes de suster ataques de diversos tipos. Estes mecanismos devem possuir qualificações de segurança elevadas, visando a protecção de pessoas, veículos ou infraestruturas. O desenvolvimento tecnológico de sistemas de protecção inovadores permite acompanhar a evolução do tipo, tecnologia e performance das ameaças (armas, projécteis, explosivos, etc.). Consequentemente, é de grande importância o desenvolvimento de meios capazes de avaliar a capacidade de absorção d

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Yanko, William Andrew. "Experimental and numerical evaluation of concrete spalling during extreme thermal loading." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0006380.

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Bücher zum Thema "Spallings"

Connolly, Raymond John. The spalling of concrete in fires. Aston University. Department of Civil Engineering, 1995.

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Center, NASA Glenn Research, ed. A deterministic interfacial cyclic oxidation spalling model. National Aeronautics and Space Administration, Glenn Research Center, 2002.

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Center, NASA Glenn Research, ed. A deterministic interfacial cyclic oxidation spalling model. National Aeronautics and Space Administration, Glenn Research Center, 2002.

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Center, Lewis Research, ed. The effect of 0.1 atomic percent Zirconium on the cyclic oxidation behavior of b□-s□gbb□-s□s-NiAl for 3000 hours at 1200b□-s□p0b□-s□sC. National Aeronautics and Space Administration, Lewis Research Center, 1988.

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Kelkar, Ajit Dhundiraj. Analyses of quasi-isotropic composite plates under quasi-static point loads simulating low-velocity impact phenomena. Old Dominion University, 1985.

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Center, Lewis Research, ed. The effect of 0.1 atomic percent Zirconium on the cyclic oxidation behavior of Ý-NiAl for 3000 hours at 1200⁰C. National Aeronautics and Space Administration, Lewis Research Center, 1988.

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Blickensderfer, Robert. Laboratory tests of spalling, breaking, and abrasion of wear-resistant alloys used in mining and mineral processing. U.S. Dept. of the Interior, Bureau of Mines, 1985.

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D, Sheffler K., Ortiz Milton, and Lewis Research Center, eds. Thermal barrier coating life prediction model development: Phase 1, final report. NASA Lewis Research Center, 1989.

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BV, Hoogovens Groep. Mathematical model for the determination of thermal spalling in refractory material on basis of the practical relationship of the appearance of rupture, physical properties and physical conditions. Commission of the European Communities, 1985.

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Buchteile zum Thema "Spallings"

Silverton, Craig D., and Paul Dougherty. "Spalling." In Encyclopedia of Trauma Care. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-29613-0_401.

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Han, Baoguo, Liqing Zhang, and Jinping Ou. "Anti-Spalling Concrete." In Smart and Multifunctional Concrete Toward Sustainable Infrastructures. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4349-9_10.

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Hu, Huan, Renwei Mao, and Katsuyuki Sakuma. "Controlled Spalling Technology." In Flexible, Wearable, and Stretchable Electronics. CRC Press, 2020. http://dx.doi.org/10.1201/9780429263941-7.

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Bidžević, Irfan, Sanin Džidić, and Ahmed El Sayed. "Spalling of Concrete." In Lecture Notes in Networks and Systems. Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-43056-5_7.

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Bidžević, Irfan, and Sanin Džidić. "Fire Spalling of Concrete." In New Technologies, Development and Application VII. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-66271-3_68.

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Rawat, S., Y. X. Zhang, and C. K. Lee. "Spalling Resistance of Hybrid Polyethylene and Steel Fiber-Reinforced High-Strength Engineered Cementitious Composite." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-3330-3_33.

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AbstractWe analyzed the effect of elevated temperatures on the integrity of high-strength engineered cementitious composite (ECC) made with a hybrid combination of polyethylene (PE) and steel fibers. The 50 mm cube specimens were subjected to temperature ranging from 200 to 800 °C at three different heating rates: 1, 5, and 10 °C/min. Five different types of mixes with varying content of supplementary cementitious materials and fibers were evaluated. No spalling was observed at 1–5 °C/min heating rate and <400 °C. However, at a heating rate of 10 °C/min for temperature 600–800 °C, all ECC s

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Lo Monte, F., and R. Felicetti. "Spalling Sensitivity Test on Concrete." In Lecture Notes in Civil Engineering. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78936-1_37.

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Woodburn, Peter, Mike Deevy, Ivy Wang, Jiajie Zhu, Michael Boyd, and Nicole Hoffman. "Train fire spalling risk assessment." In High Speed Two (HS2): Infrastructure Design and Construction (Volume 1). ICE Publishing, 2021. http://dx.doi.org/10.1680/hs2.65765.193.

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Jiang, Ruiyi, Jiang Feng, and Min Hou. "Preparation and Blast Responses of Basalt Fiber-Reinforced Polymer (BFRP) Bar Reinforced Shield Tunnelling Segments." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-4090-1_38.

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AbstractBFRPs has the advantages of light weight, corrosion resistance and good durability compared with steels, which is expected to solve the above problems when applied to shield tunnelling segments. In this study, the preparation process of basalt fiber-reinforced polymer (BFRP) bar reinforced shield tunnelling segment (BSTS) is described in detail against the background of shield tunnelling segment actually used in engineering. In order to investigate the blast resistance performance of the BSTS under blast loading, the test process is simulated using LS-DYNA finite element analysis softw

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Both, C., G. M. Wolsink, and A. J. Breunese. "Spalling of concrete tunnel linings in fire." In (Re)Claiming the Underground Space. Routledge, 2022. http://dx.doi.org/10.1201/9780203741184-41.

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Konferenzberichte zum Thema "Spallings"

Rishel, D. M., F. S. Pettit, and N. Birks. "The Role of Spalling in the Erosion-Corrosion of Metals at High Temperatures." In CORROSION 1992. NACE International, 1992. https://doi.org/10.5006/c1992-92135.

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Abstract The disruption of a protective oxide scale, by spalling or exfoliation, from the metallic substrate of components can be very detrimental with respect to the useful lifetimes of components used for high temperature applications. An important contribution to spalling is the existing stress state of the oxide/metal system. In actual service conditions, such stresses may be generated as a result of oxide growth processes, thermal cycling or erosive particle impact. The results of an extensive study of the erosion-corrosion response of pure iron illustrate the influence of erosion induced

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Sacchitella, Elijah, Stephen Polly, Seth Hubbard, Pablo Coll, and Mariana Bertoni. "Demonstration of Substrate Reuse using Acoustic Spalling in GaAs based Photovoltaics." In 2024 IEEE 52nd Photovoltaic Specialist Conference (PVSC). IEEE, 2024. http://dx.doi.org/10.1109/pvsc57443.2024.10749591.

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Kitamura, Kazuyuki, Yoshitaka Nishiyama, Nobuo Otsuka, and Takeo Kudo. "Stress and Adhesion of Protective Oxide Scales on a Stainless Steel." In CORROSION 2007. NACE International, 2007. https://doi.org/10.5006/c2007-07466.

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Abstract In-situ acoustic emission (AE) and Raman measurements, focusing on the adhesion of a protective oxide scale, were conducted to clarify the breakaway behavior under cyclic condition. The AE measurement showed that the scale failure such as spalling and/or cracking occurred even after one cycle of 3 hr heating at 1173 °K. It was also clarified that the scale stress without the creep-deformation and spalling corresponded to calculated thermal stress. The critical adhesion force of the scale on 25Cr-20Ni steel heated for 3 hr at 1173 °K was estimated to be 1.7± 0.2 GPa in the range of 573

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Schmitt, G., T. Gudde, and E. Strobel-Effertz. "Fracture Mechanical Properties of CO2 Corrosion Product Scales and Their Relation to Localized Corrosion." In CORROSION 1996. NACE International, 1996. https://doi.org/10.5006/c1996-96009.

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Abstract For the first time fracture mechanical properties of scales from wet corrosion were considered with respect to the initiation steps of flow induced localized corrosion (FILC) of steel under conditions of scale forming corrosion processes. Fracture mechanical data for iron carbonate scales from carbon dioxide corrosion, assessed by first principle considerations, were compared with own experimental data in a failure mode diagram which correlates the tendency of scale spalling with scale thickness related critical strains. Inhibitors influence the fracture mechanical properties of corro

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Jiang, Han, Aijun Yan, Zhe Zhai, and Xiaohui Wang. "Control and prediction of oxidation layer spalling in supercritical power boiler tubes." In International Conference on Mechatronics and Mechanical Engineering (ICMME 2024), edited by Yucheng Jiang. SPIE, 2024. http://dx.doi.org/10.1117/12.3038343.

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Allan, M. L., and B. W. Cherry. "Mechanical Simulation of Corrosion Induced Cracking in Reinforced Concrete." In CORROSION 1989. NACE International, 1989. https://doi.org/10.5006/c1989-89377.

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Abstract Although it has long been accepted that the spalling of concrete from corroded reinforcing bars occurs as a result of the pressure generated because the volume of rust produced is so much larger than the volume of metal which is dissolved, there have been few previous attempts to develop this model quantitatively. Apparatus has therefore been set up to determine the pressure which is necessary to cause spalling to take place. This consists of a concrete encased reinforcing bar with a void at the steel/concrete interface which simulates an active anodic area. This void may be pressuriz

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Yoo, Nicholas J., Sarah Collins, Gavin P. Forcade, et al. "Full Wafer Spalling and Cell Processing of Devices Grown on GaAs(100) Substrates." In 2024 IEEE 52nd Photovoltaic Specialist Conference (PVSC). IEEE, 2024. http://dx.doi.org/10.1109/pvsc57443.2024.10749563.

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Schmitt, G., M. Mueller, M. Papenfuss, and E. Strobel-Effertz. "Understanding Localized CO2 Corrosion of Carbon Steel from Physical Properties of Iron Carbonate Scales." In CORROSION 1999. NACE International, 1999. https://doi.org/10.5006/c1999-99038.

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Abstract New data on the fracture mechanical properties (Young’s modulus, fracture stress, fracture strain, internal stress, intrinsic stress, and adhesion) and electrical resistance of iron carbonate scales from CO2 corrosion of carbon steel are reported and discussed with respect to mechanistic considerations on localized attack in CO2 corrosion. The cracking and spalling of iron carbonate scales is primarily due to intrinsic stresses. Inhibitors influence the fracture mechanical properties by reducing the thickness of the scales and their intrinsic growth stresses. FILC is initiated at site

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Cabatit, Kyle, Nobuhiro Chijiwa, Kunihiko Uno, Yutaka Tanaka, and Toru Yamaji. "Experimental and Analytical Study of RC Beams with Combined Steel Mass Loss and Spalling." In IABSE Symposium, Tokyo 2025: Environmentally Friendly Technologies and Structures: Focusing on Sustainable Approaches. International Association for Bridge and Structural Engineering (IABSE), 2025. https://doi.org/10.2749/tokyo.2025.3361.

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<p>The corrosion of reinforcing steel bars in concrete threatens the performance of reinforced concrete structures. This study investigates the structural performance of severely corroded RC beams, focusing on rebar section loss, bond loss, and concrete spalling. Seven beam specimens were constructed with varying corrosion levels using the impressed current method, and different cover levels using paper clay. Loading tests provided the mid-span deflection curves, while digital image correlation showed the crack patterns. Flexural capacity decreased with greater corrosion and cover loss,

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Cummings, Scott M., and Cameron P. Lonsdale. "Wheel Spalling Literature Review." In ASME 2008 Rail Transportation Division Fall Technical Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/rtdf2008-74010.

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As a means of determining the conditions under which a patch of martensite (and eventually a spall) is formed on a wheel tread, the Wheel Defect Prevention Research Consortium (WDPRC) has conducted a review of wheel slide test reports and analytical models for the prediction of contact patch temperature due to wheel slide. The relative merits of the analytical models are discussed and applied to the known/assumed conditions, i.e., speed, axle load, and wheel/rail coefficients of friction (COF) for each of the wheel slide tests. The accuracy of the analytical models is evaluated with respect to

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Berichte der Organisationen zum Thema "Spallings"

Gilkey, Amy P., Clifford W. Hansen, John F. Schatz, David Keith Rudeen, and David L. Lord. DRSPALL :spallings model for the Waste Isolation Pilot Plant 2004 recertification. Office of Scientific and Technical Information (OSTI), 2006. http://dx.doi.org/10.2172/883469.

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Kicker, Dwayne Curtis, Courtney G. Herrick, Todd Zeitler, Bwalya Malama, David Keith Rudeen, and Amy P. Gilkey. DRSPALL: Impact of the Modification of the Numerical Spallings Model on Waste Isolation Pilot Plant Performance Assessment. Office of Scientific and Technical Information (OSTI), 2016. http://dx.doi.org/10.2172/1235212.

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Bertoni, Mariana. Sound Assisted Low Temperature Spalling: Upscaling and Throughput. Office of Scientific and Technical Information (OSTI), 2023. http://dx.doi.org/10.2172/1963713.

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Tibbetts, Caitlin, Dylan Scott, Jameson Shannon, and Jeb Tingle. Sliver Spall Mitigation Field Investigation, Laboratory Study, and Mixture Proportioning Analysis. Engineer Research and Development Center (U.S.), 2024. http://dx.doi.org/10.21079/11681/48756.

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A combined field and laboratory study was conducted to identify factors contributing to sliver spall of concrete pavements and recommend avenues for prevention. In this study, spall density maps of eight airfields were created, and cores were taken for petrographic analysis. A companion laboratory study evaluated nondestructive testing equipment for identifying concrete prone to sliver spalling. Concrete mix designs with good and poor performance were analyzed for trends in mixture proportioning and aggregate gradation. Spall density mapping indicated sliver spalling was more likely to occur o

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Varma, Amit H., Jan Olek, Christopher S. Williams, Tzu-Chun Tseng, Dan Huang, and Tom Bradt. Post-Fire Assessment of Prestressed Concrete Bridges in Indiana. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317290.

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This project focused on evaluating the effects of fire-induced damage on concrete bridge elements, including prestressed concrete bridge girders. A series of controlled heating experiments, pool fire tests, material tests, and structural loading tests were conducted. Experimental results indicate that the portion of concrete subjected to temperatures higher than 400°C loses significant amounts of calcium hydroxide (CH). Decomposition of CH increases porosity and causes significant cracking. The portion of concrete exposed to temperatures higher than 400°C should be repaired or replaced. When s

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Tseng, Tzu-Chun, and Amit H. Varma. Synthesis Study: Repair and Durability of Fire-Damaged Prestressed Concrete Bridge Girders. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317378.

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Recent research results from INDOT research project SPR-4221 indicate that the damage to prestressed concrete bridge girders from an intense hydrocarbon fire is limited to concrete material degradation up to a depth of 1 inch from the surface. Additionally, concrete cracking and spalling occur in the fire-damaged region, but the structural strength (flexure and shear) of fire-exposed prestressed concrete bridge girders is not compromised. The findings open the possibility for repairing damaged bridge girders and answers questions regarding the durability of damaged-unrepaired and damaged-repai

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Schulte, Kevin. High-Efficiency, Low-Cost III-V Solar Cells by Dynamic Hydride Vapor Phase Epitaxy Coupled with Rapid, Polishing-Free Wafer Reuse through Orientation-Optimized (110) Spalling. Office of Scientific and Technical Information (OSTI), 2021. http://dx.doi.org/10.2172/1806554.

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Robinson, W., Jeremiah Stache, Jeb Tingle, Carlos Gonzalez, Anastasios Ioannides, and James Rushing. Naval expeditionary runway construction criteria : P-8 Poseidon pavement requirements. Engineer Research and Development Center (U.S.), 2023. http://dx.doi.org/10.21079/11681/46857.

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A full-scale airfield pavement test section was constructed and trafficked by the US Army Engineer Research and Development Center to determine minimum rigid and flexible pavement thickness requirements to support contingency operations of the P-8 Poseidon aircraft. Additionally, airfield damage repair solutions were tested to evaluate the compatibility of those solutions with the P-8 Poseidon. The test items consisted of various material thickness and strengths to yield a range of operations to failure allowing development of performance predictions at a relatively lower number of design oper

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Baah, Prince. Implementing Epoxy Injection in Concrete Overlaid Bridge Decks. Purdue University, 2023. http://dx.doi.org/10.5703/1288284317588.

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Concrete overlays have proven to be an effective maintenance treatment as they slow de-icing chemical and water penetration into the original deck surface. Typically, due to vibration, structural flexibility, and weak bond between the concrete overlay and deck concrete potentially due to poor construction, de-bonding develops at the boundary between the original deck and overlay. This de-bonding creates voids, providing reservoir for chloride laden water to fill after it penetrates cracks in the surface. Displacing this liquid solution and filling these cracks with epoxy helps reduce freeze/th

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Ko, Yu-Fu, and Jessica Gonzalez. Fiber-Based Seismic Damage and Collapse Assessment of Reinforced Concrete Single-Column Pier-Supported Bridges Using Damage Indices. Mineta Transportation Institute, 2023. http://dx.doi.org/10.31979/mti.2023.2241.

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Near-fault earthquakes can have major effects on transportation systems due to the structural damage they impose on bridges. Therefore, it is imperative to assess the seismic damage of bridges appropriately, and this research focuses on reinforced concrete (RC) bridges. This research advances the seismic performance assessment of RC single-column pier-supported bridges with flexural failure under near-fault ground motion by use of ductility coefficients and damage indices. The methodology included modeling fiber-based nonlinear beam-column elements to simulate the damage development process of

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