Academic literature on the topic 'Materials – Creep'

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Journal articles on the topic "Materials – Creep"

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McDowell, G. R., and J. J. Khan. "Creep of granular materials." Granular Matter 5, no. 3 (December 1, 2003): 115–20. http://dx.doi.org/10.1007/s10035-003-0142-x.

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Zhai, Peng Cheng, Gang Chen, and Qing Jie Zhang. "Creep Property of Functionally Graded Materials." Materials Science Forum 492-493 (August 2005): 599–604. http://dx.doi.org/10.4028/www.scientific.net/msf.492-493.599.

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The present paper investigates the creep phenomenon of the functionally graded materials under high temperature environment by the computational micromechanical method (CMM). Based on the real microstructure of the functionally graded interlayer with different component volume fractions, the emulation experiment is implemented for the creep test numerically and the creep parameters are obtained. A further series of simulation works are carried out to investigate the creep phenomenon of FGM interlayers in more detail. Numerical results show that the creep phenomenon is obvious not only for the metal-rich interlayers but also for the ceramic-rich interlayers. The creep property of ceramic/metal interlayer depends on the material’s properties of the ceramic obviously. It is remarkable that the creep strain rate of the ceramic/metal interlayer is larger than the corresponding one of pure metal under the same load when the modulus of the ceramic component is lower than the one of the metal component.
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Widjaja, Sujanto, Karl Jakus, Revti Atri, John E. Ritter, and Sandeepan Bhattacharya. "Residual surface stress by localized contact-creep." Journal of Materials Research 12, no. 1 (January 1997): 210–17. http://dx.doi.org/10.1557/jmr.1997.0028.

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When a ceramic material creeps under a localized stress and then cools under load, a portion of the creep flow stress is retained as a residual compressive stress due to elastic rebound being constrained by the creep zone. Localized contact-creep was used to generate residual compressive surface stress in soda-lime glass and two sintered aluminas. The Vickers indentation technique was used to measure the residual stress within the contact-creep area. Alumina with a higher elastic modulus than glass retained higher residual compressive surface stress. The results were in reasonable agreement with the predicted stress distribution given by finite element analysis.
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Dorčáková, Františka, Vít Jan, Lucia Hegedűsová, and Ján Dusza. "Impression Creep in TBC and Advanced Ceramics Materials." Key Engineering Materials 333 (March 2007): 281–84. http://dx.doi.org/10.4028/www.scientific.net/kem.333.281.

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The indentation creep of free-standing Y-ZrO2 layer and 20Sc-60Si-20Mg-80O-20N oxynitride glass has been investigated. Creep experiment has been performed with flat cylindrical indenter (hot pressed SiC) in the temperature range from 860 °C to 1300 °C at the loads from 20 to 100 MPa. The strain-time relationship was registered and the creep exponent and activation energy of creep have been calculated. The microstructure changes have been observed and documented. Viscosity as a function of temperature and the glass transition temperature (Tg) were determined in oxynitride glass and compared with values from compressive creep.
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Hyde, C. J., Thomas H. Hyde, and Wei Sun. "Small Ring Testing of High Temperature Materials." Key Engineering Materials 734 (April 2017): 168–75. http://dx.doi.org/10.4028/www.scientific.net/kem.734.168.

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In service components such as steam pipes, pipe branches, gas and steam turbine blades, etc. which operate in engineering applications such as power plant, aero-engines, chemical plant etc., can operate at temperatures which are high enough for creep to occur. Often, only nominal operating conditions (i.e. pressure, temperatures, system load, etc.) are known and hence precise life predictions for these components, which may be complex in terms of geometry or weld characteristics, are not possible. Within complex components it can also be the case that the proportion of the material creep life consumed may vary from position to position within the component. It is therefore important that non-destructive techniques are available for assisting in the making of decisions on whether to repair, continue operating or replace certain components. Small specimen creep testing is a technique which can allow such analyses to be performed. Small samples of material are removed from the component to make small creep test specimens. These specimens can then be tested to give information on the remaining creep life of the component. This paper presents the results of small ring specimens tested under creep conditions and shows the comparison to standard (full size) creep testing for materials used under high temperature in industry.
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Ascione, Luigi, Valentino Paolo Berardi, and Anna D’Aponte. "Creep phenomena in FRP materials." Mechanics Research Communications 43 (July 2012): 15–21. http://dx.doi.org/10.1016/j.mechrescom.2012.03.010.

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Taratorin, B. I. "Creep theory of aging materials." Soviet Applied Mechanics 21, no. 2 (February 1985): 195–99. http://dx.doi.org/10.1007/bf00886722.

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Lindström, Stefan B., Erdem Karabulut, Artem Kulachenko, Houssine Sehaqui, and Lars Wågberg. "Mechanosorptive creep in nanocellulose materials." Cellulose 19, no. 3 (February 16, 2012): 809–19. http://dx.doi.org/10.1007/s10570-012-9665-9.

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Gollapudi, S., K. V. Rajulapati, I. Charit, K. M. Youssef, C. C. Koch, R. O. Scattergood, and K. L. Murty. "Understanding creep in nanocrystalline materials." Transactions of the Indian Institute of Metals 63, no. 2-3 (April 2010): 373–78. http://dx.doi.org/10.1007/s12666-010-0050-9.

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Lilholt, H. "Creep of fibrous composite materials." Composites Science and Technology 22, no. 4 (January 1985): 277–94. http://dx.doi.org/10.1016/0266-3538(85)90065-x.

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Dissertations / Theses on the topic "Materials – Creep"

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De, Voy Julian David James. "Failure of creep brittle materials." Thesis, University of Leicester, 1993. http://hdl.handle.net/2381/34757.

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Abdallah, Zakaria. "Creep lifing methods for components under high temperature creep." Thesis, Swansea University, 2010. https://cronfa.swan.ac.uk/Record/cronfa43065.

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Prakash, Om. "Creep deformation of metal analogue materials." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239561.

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Feng, Gang. "Creep effects in nanoindentation." Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk/hkuto/record.jsp?B23273288.

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Feng, Gang, and 封剛. "Creep effects in nanoindentation." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31224350.

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Stracey, Muhammad Ghalib. "Continuum Damage Mechanics (CDM) modelling of dislocation creep in 9-12% Cr creep resistant steels." Master's thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/22994.

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The generation of electricity to meet an ever-growing demand has become a defining characteristic of the modern world for both developed and developing nations alike. This, coupled with the intensifying concern with pollution and its effects on the environment has put immense pressure on how quickly and efficiently power is produced. Being the most prevalent source of electricity generation, coal fired power plants have been subject to increasing scrutiny and study in an effort to improve the efficiency at which they operate. Hence, coal fired power plants are being run at increased temperatures and pressures such as those observed in Super-critical and Ultra-super-critical plants. This has by extension put excessive demand on materials used in these plants specifically within the boiler and superheater pipe sections where the most extreme thermodynamic conditions are experienced. The most commonly used materials for these applications are in the family of ferritic/martensitic 9-12% Cr steels chosen for their superior material properties especially during long-term exposure as coal fired power plants typically operate for over 20 years before being decommissioned. One of the lesser understood aspects of 9-12%Cr steels is with regard to their long-term material properties specifically that of creep degradation and deformation. This has been partially due to the reliance of creep life predictions in the past being based on accelerated creep testing and empirically based modelling. With the relatively recent revelations of empirically based modelling shown to be inaccurate when extrapolated to the long-term, a need has been identified amongst researchers to develop more accurate models based on physical relationships and material microstructure. Moreover, the insight obtained from modern experimental techniques and technologies as well as ever-expanding computing capabilities provide an opportunity to produce microstructurally based models with a high degree of complexity. Thus motivated, the focus of this dissertation was to develop a physically based dislocation creep model using the Continuum Damage Mechanics (CDM) approach. A dislocation CDM model was developed and implemented in the current work for uniaxial creep loading using the numerical modelling software Matlabᵀᴹ. The CDM approach was built upon fundamental dislocation theory as well as other microstructural considerations pertaining to dislocation creep including subgrain coarsening, M₂₃C₆ precipitate coarsening and stress redistribution. The CDM model was found to require calibration in order to be applied to specific 9- 12% Cr steels which was implemented using a parameter optimisation routine. The results obtained were compared with experimentally obtained, long-term creep-time and microstructural data for the 11% Cr steel CB8 and the 9% Cr steel P92. The CDM creep-time predictions were found to vary in accuracy depending upon the experimental data against which the model was calibrated. Upon further investigation, it was hypothesised that the discrepancy observed was due to the formation of the Modified Z-phase in some of the long term creep data but not in others which was based primarily on the differing creep exposure times of the various samples. The CDM creep-time predictions for P92 were found to be accurate when compared with experimental results regardless of creep exposure times. The apparent difference in the approximation of the creep deformation for the two steels was concluded as being due to the formation of the Modified Z-phase in CB8 but not in P92 as Modified Zphase formation is intrinsically linked with the Cr content of the steel.
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Ramteke, Ashok Lahanuji. "Multiaxial creep of isotropic and anisotropic materials." Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/47770.

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Isogai, Takeshi. "Creep-fatigue crack growth in engineering materials." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627408.

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Osiroff, Ricardo. "Damorheology: creep-fatigue interaction in composite materials." Diss., Virginia Tech, 1990. http://hdl.handle.net/10919/38757.

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This investigation addresses the interaction mechanisms of time dependent material behavior and cyclic damage during fatigue loading of fiber reinforced composite laminates. A new term 'damorheology' has been coined to describe such physical behavior. The lamina has been chosen as the building block and a cross ply laminate configuration was the selected test case. The chosen material system is the Radel X/T65-42 thermoplastic composite by Amoco. The fatigue performance at the lamina level is represented by the dynamic stiffness, residual strength and fatigue life of unidirectional laminates. The time dependent behavior is represented at the lamina level by a Pseudo-Analog Mechanical model. The thermo-rheological characterization procedure combines mechanical (creep) and thermal (dynamic mechanical analysis) techniques.
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Falkeström, Oskar, Kevin Coleman, and Malin Nilsson. "Micromechanical modelling of creep in wooden materials." Thesis, Uppsala universitet, Tillämpad mekanik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-444796.

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Wood is a complex organic orthotropic viscoelastic material with acellular structure. When stressed, wood will deform over timethrough a process called creep. Creep affects all wooden structureand can be difficult, time-consuming and expensive to measure. For this thesis, a simple computer model of the woodenmicrostructure was developed. The hypothesis was that the modelledmicrostructure would display similar elastic and viscoelasticproperties as the macroscopic material. The model was designed by finding research with cell geometries ofconiferous trees measured. The model considered late- and earlywoodgeometries as well as growth rings. Rays were ignored as they onlycomposed 5-10% of the material. By applying a finite element method, the heterogeneous late- andearlywood cells could be homogenized by sequentially loading thestrain vector and calculating the average stress. The computer model produced stiff but acceptable values for theelastic properties. Using the standard linear solid method to modelviscoelasticity, the computer model assembled creep curvescomparable to experimental results. With the model sufficiently validated, parametric studies on thecell geometry showed that the elastic and viscoelastic propertieschanged greatly with cell shape. An unconventional RVE was alsotested and shown to give identical result to the standard RVE. Although not perfect, the model can to a certain degree predict theelastic and viscoelastic characteristics for wood given itscellular geometry. Inaccuracies were thought to be caused byassumptions and approximations when building the model.
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Books on the topic "Materials – Creep"

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Creep in metallic materials. Amsterdam: Elsevier, 1988.

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service), SpringerLink (Online, ed. Creep Mechanics. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2008.

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Betten, Josef. Creep Mechanics. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002.

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Penny, R. K. Design for creep. 2nd ed. London: Chapman & Hall, 1995.

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1938-, Ohtani Ryuichi, Ohnami Masateru 1931-, and Inoue Tatsuo 1939-, eds. High temperature creep-fatigue. London: Elsevier Applied Science, 1988.

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Creep mechanics. 2nd ed. Berlin: Springer, 2005.

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Scheidt, Bast Callie Corinne, and United States. National Aeronautics and Space Administration., eds. Computational simulation of coupled material degradation processes for probabalistic lifetime strength of aerospace materials. [Washington, DC]: National Aeronautics and Space Administration, 1992.

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United States. National Aeronautics and Space Administration., ed. Creep and creep rupture of strongly reinforced metallic composites. [Washington, DC]: National Aeronautics and Space Administration, 1990.

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Evans, R. W. Introduction to creep. London: Institute of Materials, 1993.

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E, Tuttle M., and United States. National Aeronautics and Space Administration., eds. Compression creep of filamentary composites. [Washington, DC: National Aeronautics and Space Administration, 1988.

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Book chapters on the topic "Materials – Creep"

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Betten, Josef. "Viscoelastic Materials." In Creep Mechanics, 187–235. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04971-6_11.

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Betten, Josef. "Viscoplastic Materials." In Creep Mechanics, 237–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04971-6_12.

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John, Vernon. "Creep and Creep Testing." In Testing of Materials, 78–89. London: Macmillan Education UK, 1992. http://dx.doi.org/10.1007/978-1-349-21969-8_7.

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Chawla, Krishan K. "Fatigue and Creep." In Composite Materials, 451–83. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-0-387-74365-3_13.

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Chawla, Krishan K. "Fatigue and Creep." In Composite Materials, 404–35. New York, NY: Springer New York, 1998. http://dx.doi.org/10.1007/978-1-4757-2966-5_13.

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Chawla, Krishan K. "Fatigue and Creep." In Composite Materials, 455–89. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-28983-6_13.

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Betten, Josef. "Creep Behavior of Isotropic and Anisotropic Materials; Constitutive Equations." In Creep Mechanics, 49–75. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04971-6_4.

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John, V. B. "Fracture, Fatigue and Creep." In Engineering Materials, 188–207. London: Macmillan Education UK, 1990. http://dx.doi.org/10.1007/978-1-349-10185-6_10.

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Mićunović, M. V. "A Viscoplasticity Theory of Irradiated Materials." In Creep in Structures, 139–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-84455-3_17.

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Blum, Wolfgang. "Creep Simulation." In Continuum Scale Simulation of Engineering Materials, 607–20. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2005. http://dx.doi.org/10.1002/3527603786.ch31.

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Conference papers on the topic "Materials – Creep"

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Boumerzoug, Zakaria. "Creep Behavior of Metallic Materials." In International Congress on Human-Computer Interaction, Optimization and Robotic Applications. SETSCI, 2019. http://dx.doi.org/10.36287/setsci.4.5.015.

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Ramos, Roberto, and Ronaldo B. Salvagni. "Creep Predicting in Polymeric Materials." In SAE Brasil '94. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1994. http://dx.doi.org/10.4271/942425.

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Millot, T. "Creep and Creep Cracking of A Heat Exchanger Component of." In Advanced Marine Materials: Technology & Application. RINA, 2003. http://dx.doi.org/10.3940/rina.amm.2003.8.

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Sathiyanarayanan, S., Srinivasan M. Sivakumar, C. Lakshmana Rao, and V. N. Shankar. "Electromechanical creep of PVDF." In Smart Materials, Structures, and Systems, edited by S. Mohan, B. Dattaguru, and S. Gopalakrishnan. SPIE, 2003. http://dx.doi.org/10.1117/12.514842.

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Jensen, Eric M., and Ray S. Fertig. "Combined Multiscale Creep Strain and Creep Rupture Modeling for Composite Materials." In 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-1360.

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Sakai, Shinsuke, Yu Watanabe, Satoshi Izumi, Atsushi Iwasaki, and Takeshi Ogawa. "Determination of Creep Constitutive Law of Solder Materials Using Indentation Creep Test." In ASME 2005 Pressure Vessels and Piping Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pvp2005-71645.

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Authors reported in the previous paper [1] that indentation creep test is effective to evaluate the creep power law from small specimen. We derived the formulation and applied the proposed method to turbine rotor materials. Eventually, it was shown that the method is applicable for the evaluation of creep constitutive law especially under high stress region. Under the low stress region, however, the applicability of the method was not confirmed since it requires much time for the confirmation. As most necessary property for creep deformation is that for low stress region, the extension of the proposed method for the low stress region is considered extremely important. For this purpose, it is not appropriate to use steel materials for the confirmation because it consumes too much time to conduct creep indentation test under low stress. For solder materials, however, it is rather easier to conduct the creep indentation test under low stress because the creep phenomena occur even at room temperature. In this paper, we report the results of creep indentation test for solder materials and examine the applicability of the proposed method. Besides finite element analysis is performed to evaluate stress conversion factor which enables us to evaluate Norton’s law only from creep indentation tests.
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Tahir, Fraaz, and Yongming Liu. "Development of creep-dominant creep-fatigue testing for Alloy 617." In 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2016. http://dx.doi.org/10.2514/6.2016-0668.

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KATOGI, HIDEAKI, and KENICHI TAKEMURA. "CREEP RUPTURE OF WATER-ABSORBED GREEN COMPOSITE." In MATERIALS CHARACTERISATION 2017. Southampton UK: WIT Press, 2017. http://dx.doi.org/10.2495/mc170291.

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Bouttes, David, and Damien Vandembroucq. "Creep of amorphous materials: A mesoscopic model." In 4TH INTERNATIONAL SYMPOSIUM ON SLOW DYNAMICS IN COMPLEX SYSTEMS: Keep Going Tohoku. American Institute of Physics, 2013. http://dx.doi.org/10.1063/1.4794621.

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"Predicting Long-Term Creep from Short-Term Creep Test." In SP-229: Quality of Concrete Structures and Recent Advances in Concrete Materials and Testing. American Concrete Institute, 2005. http://dx.doi.org/10.14359/14728.

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Reports on the topic "Materials – Creep"

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Ferber, M. K., A. Wereszczak, and J. A. Hemrick. Comprehensive Creep and Thermophysical Performance of Refractory Materials. Office of Scientific and Technical Information (OSTI), June 2006. http://dx.doi.org/10.2172/885151.

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Sutton, Michael A., Bill Y. Chao, Xiaomin Deng, and Jed S. Lyons. Creep, Damage and Life Prediction for High Temperature Materials. Fort Belvoir, VA: Defense Technical Information Center, December 1997. http://dx.doi.org/10.21236/ada340457.

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Hyers, Robert W. Non-contact Measurement of Creep in Ultra-High-Temperature Materials. Fort Belvoir, VA: Defense Technical Information Center, November 2009. http://dx.doi.org/10.21236/ada524249.

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Thembeka Ncube, Ayanda, and Antonio Bobet. Use of Recycled Asphalt. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317316.

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The term Reclaimed Asphalt Pavement (RAP) is used to designate a material obtained from the removal of pavement materials. RAP is used across the US in multiple applications, largely on asphalt pavement layers. RAP can be described as a uniform granular non-plastic material, with a very low percentage of fines. It is formed by aggregate coated with a thin layer of asphalt. It is often used mixed with other granular materials. The addition of RAP to aggregates decreases the maximum dry unit weight of the mixture and decreases the optimum water content. It also increases the Resilient Modulus of the blend but decreases permeability. RAP can be used safely, as it does not pose any environmental concerns. The most important disadvantage of RAP is that it displays significant creep. It seems that this is caused by the presence of the asphaltic layer coating the aggregate. Creep increases with pressure and with temperature and decreases with the degree of compaction. Creep can be mitigated by either blending RAP with aggregate or by stabilization with chemical compounds. Fly ash and cement have shown to decrease, albeit not eliminate, the amount of creep. Mechanical stabilizing agents such as geotextiles may also be used.
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Meyer, Mitch. Oxidation and creep behavior of Mo*5*Si*3* based materials. Office of Scientific and Technical Information (OSTI), June 1995. http://dx.doi.org/10.2172/108132.

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Liebowitz, Harold. Creep and Fracture Characteristics of Materials and Structures at Elevated Temperatures. Fort Belvoir, VA: Defense Technical Information Center, May 1988. http://dx.doi.org/10.21236/ada196831.

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Starbuck, J. M. Compressive Creep Response of T1000G/RS-14 Graphite/Polycyanate Composite Materials. Office of Scientific and Technical Information (OSTI), January 1998. http://dx.doi.org/10.2172/657696.

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Li, M., S. Majumdar, W. K. Soppet, D. Rink, and K. Natesan. Status report on improved understanding of creep-fatigue damage in advanced materials. Office of Scientific and Technical Information (OSTI), August 2012. http://dx.doi.org/10.2172/1054496.

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Biner, S. B. An analysis of creep crack growth of interface cracks in layered/graded materials. Office of Scientific and Technical Information (OSTI), July 1997. http://dx.doi.org/10.2172/505289.

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Li, M., W. K. Soppet, S. Majumdar, D. Rink, and K. Natesan. Final report on improved creep-fatigue models on advanced materials for SFR applications. Office of Scientific and Technical Information (OSTI), November 2012. http://dx.doi.org/10.2172/1054495.

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