Relevant bibliographies by topics / Rubber behavior

Academic literature on the topic 'Rubber behavior'

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Published: 1 April 2023

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Journal articles on the topic "Rubber behavior"

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Tavio and Usman Wijaya. "Comparative behavior of local hyperelastic lowgrade rubbers for low-cost base isolation." MATEC Web of Conferences 276 (2019): 01001. http://dx.doi.org/10.1051/matecconf/201927601001.

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As the second largest rubber producer in the world, Indonesia has a very potential opportunity to support the development of rubber base isolation. Various grades of rubber are produced by the local rubber manufacturers starting from the low to high grade rubbers. In the study, the local rubbers were also compared to the rubbers from another developing country, e.g. India. The laboratory test results used to develop the suitable constitutive model for hyperelastic material and then compared to the hyperelastic model of Shahzad et al. Several tests on the local low-grade rubbers have been conducted, namely the uniaxial tensile, planar shear, and equibiaxial tensile tests. From the tests, it can be concluded the behavior of the local low-grade rubber can be fitted with the Ogden model different from the characteristic of rubber tested by Shahzad et al. which was fitted with the Yeoh model.
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Zhang, Tengfei, Jie Su, Yuanjie Shu, Fei Shen, and Liaoliang Ke. "Fretting Wear Behavior of Three Kinds of Rubbers under Sphere-On-Flat Contact." Materials 14, no. 9 (April 23, 2021): 2153. http://dx.doi.org/10.3390/ma14092153.

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Rubbers are widely used in various fields as the important sealing materials, such as window seal, door seal, valve, pump seal, etc. The fretting wear behavior of rubbers has an important effect on their sealing performance. This paper presents an experimental study on the fretting wear behavior of rubbers against the steel ball under air conditions (room temperature at 20 ± 2 °C and humidity at 40%). Three kinds of rubbers, including EPDM (ethylene propylene diene monomer), FPM (fluororubber), and NBR (nitrile–butadiene rubber), are considered in experiments. The sphere-on-flat contact pattern is used as the contact model. The influences of the displacement amplitude, normal force, frequency, and rubber hardness on the fretting wear behavior are discussed in detail. White light profiler and scanning electron microscope (SEM) are used to analyze the wear mechanism of the rubber surface. The fretting wear performances of three rubbers are compared by considering the effect of the displacement amplitude, normal force, frequency, and rubber hardness. The results show that NBR has the most stable friction coefficient and the best wear resistance among the three rubbers.
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Shin, Hyung Seop, Sung Su Park, and Joon Hong Choi. "Influence of Temperature on Dynamic Behavior of Rubber Materials by Taylor Impact Test." Materials Science Forum 673 (January 2011): 83–88. http://dx.doi.org/10.4028/www.scientific.net/msf.673.83.

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The understanding of the deformation behavior of rubber materials under high strain-rate or high loading-rate conditions will be important in their impact applications adopting significant viscoelastic behavior. Taylor impact test has originally used to determine the average dynamic yield strength of metallic materials at high strain rates, but it also can be used to examine the overall deformation behavior of rubbers representing large elastic deformation by using a high-speed photography technique. Taylor impact tests of rubber materials were carried out in the velocity range between 100~250 m/s using a 20 mm air gun. In order to investigate the overall dynamic deformation behavior of rubber projectiles during Taylor impact test, a 8-Ch high-speed photography system which provides a series of images at each elapsed time was incorporated. Three kinds of rubber materials with different Tg (glass transition temperature) were supplied. The bulging behavior of rubber projectile could be evaluated quantitatively by digitizing images taken. Taylor impact tests at various temperature levels were conducted to predict the bulging behavior of rubbers at high strain rate.
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Isayev, Avraam I., Tian Liang, and Todd M. Lewis. "EFFECT OF PARTICLE SIZE ON ULTRASONIC DEVULCANIZATION OF TIRE RUBBER IN TWIN-SCREW EXTRUDER." Rubber Chemistry and Technology 87, no. 1 (March 1, 2014): 86–102. http://dx.doi.org/10.5254/rct.13.87926.

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ABSTRACT Ultrasonic devulcanization of tire rubber particles of 10 and 30 meshes by means of a new ultrasonic twin-screw extruder was investigated. The ultrasonic amplitude and devulcanization temperature were varied at a fixed frequency of 40 kHz. The die pressure and ultrasonic power consumption during devulcanization were recorded. The degree of devulcanization was investigated by measuring the cross-link density, gel fraction, and revulcanization behavior. Rubber of 30 mesh exhibited a lower die pressure and higher degree of devulcanization than that of rubber of 10 mesh. Because of the higher level of devulcanization and lower viscosity of devulcanized rubbers at higher amplitudes, the temperature of devulcanized rubbers at the die was reduced with an increase of the ultrasonic amplitude. Generally, the torque at the start of curing and maximum torque on the curing curve measured during revulcanization is higher for rubber of 10 mesh and rubbers devulcanized at a lower temperature. Rheological properties of devulcanized and revulcanized rubbers and mechanical properties of revulcanizates were measured. The complex viscosity of devulcanized and revulcanized rubbers of both meshes as a function of frequency exhibited a power-law behavior, with the power-law index being 0.06 for devulcanized rubbers and 0.02 for revulcanized rubbers. The consistency index of devulcanized and revulcanized rubbers was higher for rubber of 10 mesh; however, both rubbers showed a higher consistency index at a lower temperature. Cole–Cole plots, cross-link density, and gel fraction of devulcanized and revulcanized rubbers, revulcanization behavior, and modulus of revulcanizates separated in two distinct groups based on the level of devulcanization and effect on molecular structure of devulcanized rubber. Revulcanizates with a greater degree of devulcanization exhibited a higher elongation at break, whereas those with a lower degree of devulcanization exhibited higher strength and modulus. Revulcanizates of rubber of 30 mesh exhibited a consistently higher elongation at break. The normalized gel fraction versus normalized cross-link density was described by a unique function independent of the processing conditions and rubber particle size.
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Soltani, Deng, Taheri, Mirzababaei, and Vanapalli. "Swell–Shrink Behavior of Rubberized Expansive Clays During Alternate Wetting and Drying." Minerals 9, no. 4 (April 9, 2019): 224. http://dx.doi.org/10.3390/min9040224.

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The present study examines rubber’s capacity of improving the swell–shrink potential of expansive clays. Two rubber types of fine and coarse categories with different geometrical features were considered. The test program consisted of standard Proctor compaction and cyclic wetting–drying tests. Scanning electron microscopy (SEM) analysis was also performed to identify the soil–rubber amending mechanisms, and to observe the evolution of fabric in response to alternate wetting and drying. Cyclic wetting–drying led to the reconstruction of the soil/soil–rubber microstructure by way of inducing aggregation and cementation of the soil grains. The greater the number of applied cycles, the lower the swell–shrink features, following a monotonically decreasing trend, with the rubberized blends holding a notable advantage over the virgin soil. The tendency for reduction, however, was in favor of a larger rubber size, and more importantly the rubber’s elongated form factor; thus, predicating a rubber size/shape-dependent amending mechanism. The soil–rubber amending mechanisms were discussed in three aspects—increase in non-expansive content, frictional resistance generated as a result of soil–rubber contact, and mechanical interlocking of rubber particles and soil grains. The swell–shrink patterns/paths indicated an expansive accumulated deformation for the virgin soil, whereas the rubberized blends manifested a relatively neutral deformational state, thereby corroborating the rubber’s capacity to counteract the heave and/or settlement incurred by alternate wetting and drying.
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Batistella, Marcos, Monica Francesca Pucci, Arnaud Regazzi, José-Marie Lopez-Cuesta, Ouassila Kadri, David Bordeaux, and Florence Ayme. "Fire Behavior of Polyamide 12/Rubber Formulations Made by Laser Sintering." Materials 15, no. 5 (February 26, 2022): 1773. http://dx.doi.org/10.3390/ma15051773.

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In the present work, the processability and fire behavior of parts made by the laser sintering (LS) of polyamide 12/rubber powder blends is studied. In order to evaluate some of the interactions that could take place during LS, three acrylonitrile butadiene rubbers (NBRs) were used, which included two that had different acrylonitrile (AN) contents, and one that had carboxylated rubber. The results show that the flowability of the powders is strongly dependent on the rubber used. For the carboxylated rubber, a good flowability of the blend was observed, whereas the use of rubbers with different AN contents led to significant changes in the powder flowability, with a heterogeneous powder bed, and differences in the porosity as a function of the AN content. Furthermore, the addition of rubbers to polyamide 12 (PA12) entails an increase in the sintering window and, in particular, a change in the melting temperature of PA12 is noticed. Even though some changes in the crystallization and melting temperatures are observed, formulations containing 10 and 20 wt.% of rubbers could be processed using the same process parameters as PA12. Furthermore, the formulations containing carboxylated rubber show improved fire behavior, which is measured by a cone calorimeter, with reductions of about 45 and 65% in the peak of the heat release rate, compared to the PA12. Moreover, almost all of the samples evaluated in this study are classed as “Good” by the Flame Retardancy Index. This result can be partially explained by the formation of an amide linkage between the polyamide and NBR during processing, which could result in increases in the melt viscosities of these samples.
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Sugihardjo, Hidajat, Tavio Tavio, and Yudha Lesmana. "FE Model of Low Grade Rubber for Modeling Housing’s Low-Cost Rubber Base Isolators." Civil Engineering Journal 4, no. 1 (February 7, 2018): 24. http://dx.doi.org/10.28991/cej-030966.

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An accurate selection of strain energy function (SEF) plays a very important role for predicting the actual behavior of rubber material in the finite element analysis (FEA). The common method for selecting the SEF is by using the curve fitting procedure. However, the behavior of some typical rubbers, such as low grade rubbers (average hardness value of 47.2), cannot be predicted well by only using the curve fitting procedure. To accurately predict the actual behavior of such specifically nearly incompressible material, a series of FEA were carried out to simulate the actual behavior of four physical testing materials, namely the uniaxial, the planar shear, the equibiaxial, and the volumetric tests. This FEA is intended to examine the most suitable constitutive model in representing the rubber characteristics and behavior. From the comparisons, it can be concluded that the Ogden model provides a reasonably accurate prediction compared to the remaining investigated constitutive material models. Finally, the appropriate SEF, i.e. the Ogden model, was adopted for modeling a low-cost rubber base isolator (LCRBI) in the finite element analysis (FEA). The simple uniaxial compression test of the LCRBI is required for validating that the selected SEF works for predicting the actual behavior of LCRBI.
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Kadhim, Ali Abdulameer, and Hayder M. K. Al-Mutairee. "An Experimental Study on Behavior of Sustainable Rubberized Concrete Mixes." Civil Engineering Journal 6, no. 7 (July 1, 2020): 1273–85. http://dx.doi.org/10.28991/cej-2020-03091547.

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In terms of recycling and reuse, today's global generation of waste tire well exceeds its consumption. This has resulted in the accumulation of large stocks of toxic rubber waste that raise health and safety risks. The use of waste tire rubber for the construction of the concrete structure was suggested to combat this challenge. This paper explores tests that were performed with samples of waste tire rubber concrete to evaluate compressive strength, flexural tensile strength, modulus of rupture, and impacts resistance. The main parameters investigated were the rubber ratio as a partial volumetric replacement with fine and coarse aggregate. Chip and crumb rubbers were used to replace coarse and fine aggregate respectively in four different amounts by volume (5%, 10%, 15%, and 20%). Even if the inclusion of waste tire rubber in concrete has specific apparent degradations, the potential benefit seems to overlook the adverse effects and also meet the primary significant value of resolution for rubber waste utilization problems. The results show that the substitution of natural fine or coarse aggregates with crump-chip tier rubber will reduce mechanical properties (compressive, flexural and splitting tensile strength), but increase the impacts resistance to 426% and 396% when 20% coarse aggregates and 20% fine aggregates are replaced by rubber respectively. The proposed mix shows an ability to replace 20% of the aggregate (coarse or fine), and the producing, rubcrete, still structural concrete.
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Ghosh, Arun, and S. K. De†. "Dependence of Physical Properties and Processing Behavior of Blends of Silicone Rubber and Fluororubber on Blend Morphology." Rubber Chemistry and Technology 77, no. 5 (November 1, 2004): 856–72. http://dx.doi.org/10.5254/1.3547856.

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Abstract The paper reports that the processing behavior and physical properties of the blends of silicone rubber and fluororubber based on tetrafluoroethylene/propylene/vinylidene terpolymer. The processing behavior of the fluororubber can be improved on blending with low viscous silicone rubber. The results indicate that the processing behavior, mechanical properties, surface energies, and flammability of the blends are controlled by the blend morphology. Surface morphology of the blends show that blends of two rubbers are microheterogeneous and biphasic structure, wherein silicone rubber acts as a continuous matrix with the fluororubber as a dispersed phase.
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Li, Yu Ming, Hong Bai Bai, and Jian Zheng. "Deformation Behavior of Metal Rubber Material." Key Engineering Materials 353-358 (September 2007): 571–74. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.571.

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Analysed the stress-strain test in the pressing direction of metal rubber specimen, the deformation process can be divided into three stages. Used the accumulative method of high step polynomial, the experience formula of metal rubber’s deformation character can be simply and effectively established. With the fabrication and formation technology, the microscopic physics mechanism has been analyzed in these deformation stages.
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Dissertations / Theses on the topic "Rubber behavior"

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Euchler, Eric, Radek Stocek, Michael Gehde, Jörg-Michael Bunzel, Wolfgang Saal, and Reinhold Kipscholl. "Fracture behavior of rubber powder modified rubber blends applied for conveying belt top covers." Universitätsbibliothek Chemnitz, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-198136.

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The aim of this study is concentrated on the experimental investigation of wear resistance of rubber powder modified rubber blends. Styrene-Butadiene-Rubber (SBR) blends applied for conveying belt top covers have been modified by ground rubber (rubber powder) based on SBR. We theoretically described the rubber wear mechanism due to loading conditions occurring at conveyor belts in the field, to simulate wear behavior of top cover rubber materials. An own developed testing equipment based on gravimetric determination of mass loss of rubber test specimen was used investigating dynamic wear with respect to fracture properties of top cover materials. Furthermore we investigated fatigue crack growth (FCG) data over a broad range of tearing energy by Tear Analyzer to characterize crack propagation behavior of rubber powder modified rubber blends. Thus, we demonstrate the influence of rubber powder on resistance against occurrence of fracture as well as dynamic wear as a function of the rubber powder content in rubber blends applied for conveying belt top covers.
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Euchler, Eric, Radek Stocek, Michael Gehde, Jörg-Michael Bunzel, Wolfgang Saal, and Reinhold Kipscholl. "Fracture behavior of rubber powder modified rubber blends applied for conveying belt top covers." Technische Universität Chemnitz, 2014. https://monarch.qucosa.de/id/qucosa%3A20409.

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The aim of this study is concentrated on the experimental investigation of wear resistance of rubber powder modified rubber blends. Styrene-Butadiene-Rubber (SBR) blends applied for conveying belt top covers have been modified by ground rubber (rubber powder) based on SBR. We theoretically described the rubber wear mechanism due to loading conditions occurring at conveyor belts in the field, to simulate wear behavior of top cover rubber materials. An own developed testing equipment based on gravimetric determination of mass loss of rubber test specimen was used investigating dynamic wear with respect to fracture properties of top cover materials. Furthermore we investigated fatigue crack growth (FCG) data over a broad range of tearing energy by Tear Analyzer to characterize crack propagation behavior of rubber powder modified rubber blends. Thus, we demonstrate the influence of rubber powder on resistance against occurrence of fracture as well as dynamic wear as a function of the rubber powder content in rubber blends applied for conveying belt top covers.
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Bacigalupo, Lauren N. "Fracture behavior of nano-scale rubber-modified epoxies." Thesis, Lehigh University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3598871.

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The primary focus of the first portion of this study is to compare physical and mechanical properties of a model epoxy that has been toughened with one of three different types of rubber-based modifier: a traditional telechelic oligomer (phase separates into micro-size particles), a core-shell latex particle (preformed nano-scale particles) and a triblock copolymer (self-assembles into nano-scale particles). The effect of modifier content on the physical properties of the matrix was determined using several thermal analysis methods, which provided insight into any inherent alterations of the epoxy matrix. Although the primary objective is to study the role of particle size on the fracture toughness, stiffness and strength were also determined since these properties are often reduced in rubber-toughened epoxies. It was found that since the CSR- and SBM-modified epoxies are composed of less rubber, thermal and mechanical properties of the epoxy were better maintained. In order to better understand the fracture behavior and mechanisms of the three types of rubber particles utilized in this study, extensive microscopy analysis was conducted. Scanning transmission electron microscopy (STEM) was used to quantify the volume fraction of particles, transmission optical microscopy (TOM) was used to determine plastic damage zone size, and scanning electron microscopy (SEM) was used to assess void growth in the plastic zone after fracture. By quantifying these characteristics, it was then possible to model the plastic damage zone size as well as the fracture toughness to elucidate the behavior of the rubber-modified epoxies. It was found that localized shear yielding and matrix void growth are the active toughening mechanisms in all rubber-modified epoxies in this study, however, matrix void growth was more prevalent. The second portion of this study investigated the use of three acrylate-based triblocks and four acrylate-based diblocks to modify a model epoxy system. By varying block lengths and the polarity of the epoxy-miscible blocks, a variety of morphologies were generated (such as spherical micelles, layer particles and worm-like micelles). It was found that in some cases, the epoxy-miscible block did not yield domains substantial enough to facilitate increases in toughness. Overall, the thermal and mechanical properties of the acrylate-based triblock- and diblock-modified epoxies were found to be similar to CTBN-modified epoxy, which was used as a control. However, there were properties that were improved with the acrylate-based diblock-modified epoxies when compared to the acrylate-based triblock modified epoxies. Specifically, the viscosity penalty of the diblock-modified epoxies was shown to be a marked improvement over the triblock-modified epoxies, especially given that the fracture toughness values are similar. This reduction in the viscosity penalty becomes an important criterion when considering processing procedures and applications. Additionally, comparing the morphology of the resulting modified-epoxies utilizing atomic force microscopy (AFM) and scanning electron microscopy (SEM) led to a better understanding of the relationship between the particle morphology obtained and the physical properties of the acrylate-based rubber-modified epoxy systems in this research.

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JARAMILLO, NATALIA ANDREA DURÁN. "MECHANICAL BEHAVIOR OF SOILS REINFORCED WITH TIRES RUBBER." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2016. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=27554@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO
COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE EXCELENCIA ACADEMICA
O volume de pneus inservíveis continua aumentando a cada ano, se tornando um tema de grande preocupação para a sociedade. Motivados por esta problemática ambiental, o presente estudo experimental propõe utilizar a borracha de pneu triturada como reforço de solos, em duas diferentes granulometrias (chips e fibras), como material alternativo para o reforço de dois tipos de solos (areia e solo argiloso). Com este fim realizaram-se ensaios mecânicos, tais como ensaios de compactação proctor standard, ensaios triaxiais do tipo consolidado e isotropicamente drenado e ensaios de adensamento unidimensional, para avaliar os efeitos da granulometria da borracha de pneu, triturada em chips e fibras (com os tamanhos médios de 4,6 mm e 2 mm, respectivamente) e do teor de borracha de pneu (5, 10 por cento e 15 por cento em relação à massa de solo seco), no comportamento mecânico de misturas de areia-borracha e de misturas solo argiloso-borracha. Os resultados mostraram que tanto os chips como as fibras de pneu de borracha contribuem no aumento dos parâmetros de resistência ao cisalhamento de ambos os solos e aumentam a energia de deformação absorvida durante o cisalhamento. Ao analisar a resposta obtida em ambos os solos, se evidencia que, tanto para a argila quanto para a areia, foi mais efetivo o reforço com 10 por cento de fibras de borracha de pneu. Todos os compósitos estudados possuem características de resistência que poderiam cumprir as exigências de determinadas obras geotécnicas (aterros sobre solos moles, reforço de taludes, solo de base de fundações superficiais), portanto o uso da borracha de pneu como reforço de solos contribuiria com o menor consumo de material natural e redução dos custos de transporte e volume de material mobilizado.
The volume of discarded tires continues to increase each year, becoming a major topic of concern for society. Motivated by this environmental issue, this experimental study proposes using tire chips and tire buffings as an alternative material to improve the shear strength of two types of soil (sand and clayey soil). Because of this, standard Proctor compaction tests, consolidated-drained triaxial tests and compressibility tests were performed to assess the influence of tire rubber particle size, (with average sizes of 4.6 mm and 2 mm, respectively) and tire rubber content (5, 10 percent and 15 percent by dry weight of soil) into the mechanical behavior of sand and clayey soil. The tests results showed that both, chips and buffings contribute increasing the shear strength parameters of both the soil and increase the strain energy absorbed during the shear phase. By analyzing, the mechanical response both for clayey soil and for sand was found that the best shear strength improvement was obtained at 10 percent of tire buffings. All the composites showed resistance characteristics that would ensure the requirements for many geotechnical applications (embankments over soft soils, slope reinforcement and surface foundations), so the use of waste tires as a reinforcement material would help solve problems associated with natural resources and reducing transportation costs and earthmoving.
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Euchler, Eric, Gert Heinrich, Hannes Michael, Michael Gehde, Radek Stocek, Ondrej Kratina, Reinhold Kipscholl, Jörg-Michael Bunzel, and Wolfgang Saal. "Fundamental studies on dynamic wear behavior of SBR rubber compounds modified by SBR rubber powder." Universitätsbibliothek Chemnitz, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-198870.

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The aim of this study is focused on the experimental investigation of dynamic wear behavior of carbon black filled rubber compounds comprising pristine styrene butadiene rubber (SBR) together with incorporated SBR ground rubber (rubber powder). We also analyzed and described quantitatively the service conditions of some dynamically loaded rubber products, which are liable to wear (e.g. conveyor belts, tires). Beside the well-known standard test method to characterize wear resistance at steady-state conditions, we used an own developed testing equipment based on gravimetric determination of mass loss of rubber test specimen to investigate the influence of rubber powder content on dynamic wear depending on varying impact energy levels. Incorporation of SBR rubber powder in SBR rubber compounds increases wear. With increasing rubber powder content the wear at steady-state conditions progressively increases. However, the level of wear at dynamic loading conditions increases only once, but stays constant subsequently even with contents of incorporated rubber powder.
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Euchler, Eric, Gert Heinrich, Hannes Michael, Michael Gehde, Radek Stocek, Ondrej Kratina, Reinhold Kipscholl, Jörg-Michael Bunzel, and Wolfgang Saal. "Fundamental studies on dynamic wear behavior of SBR rubber compounds modified by SBR rubber powder." Deutsche Kautschuk-Gesellschaft e.V, 2015. https://monarch.qucosa.de/id/qucosa%3A20419.

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The aim of this study is focused on the experimental investigation of dynamic wear behavior of carbon black filled rubber compounds comprising pristine styrene butadiene rubber (SBR) together with incorporated SBR ground rubber (rubber powder). We also analyzed and described quantitatively the service conditions of some dynamically loaded rubber products, which are liable to wear (e.g. conveyor belts, tires). Beside the well-known standard test method to characterize wear resistance at steady-state conditions, we used an own developed testing equipment based on gravimetric determination of mass loss of rubber test specimen to investigate the influence of rubber powder content on dynamic wear depending on varying impact energy levels. Incorporation of SBR rubber powder in SBR rubber compounds increases wear. With increasing rubber powder content the wear at steady-state conditions progressively increases. However, the level of wear at dynamic loading conditions increases only once, but stays constant subsequently even with contents of incorporated rubber powder.
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Suttipong, Angthong. "Role of the Rubber Cooperatives in Thailand in Improving Smallholders' Incomes: Empirical Study in Traditional and Non-traditional Rubber Production Areas." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263768.

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RIBEIRO, PHILLIPE MOURAO. "MECHANICAL BEHAVIOR OF BENTONITE REINFORCED WITH GROUND RUBBER AND PET FLAKES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2018. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=36542@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO
COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE EXCELENCIA ACADEMICA
As atuais técnicas propostas para a destinação final dos pneus não são 100 por cento eficientes, existindo um grande déficit do material em questão. Um outro material que necessita de uma destinação final é o PET (polietileno tereftalato), que hoje em dia, apesar da grande quantidade reciclada, necessita de mais opções de destinação. O estudo apresentado propõe a utilização da borracha triturada (em forma de fibras e em pó - granulometria inferior a 2mm) em diferentes teores (de 5 por cento e 10 por cento, em relação ao peso seco da bentonita) e do PET triturado (na forma de fibras e em pó), como reforço de uma bentonita, para aumento dos parâmetros de resistência desta. O objetivo da pesquisa consiste em avaliar a possibilidade da utilização da borracha e do PET como melhoramento de bentonita em obras geotécnicas, como por exemplo em camadas impermeabilizantes para aterros sanitários, visto que com a utilização da borracha e do PET em obras geotécnicas seria possível a destinação de um grande volume desses materiais. Para o desenvolvimento do estudo experimental foram realizados ensaios de caracterização física e de caracterização mecânica, como ensaios de cisalhamento direto e adensamento. Com resultados obtidos a partir dos ensaios de cisalhamento direto e ensaio de adensamento, pode se perceber que as misturas B90BF10 e B90PETT10 se mostraram mais favoráveis a utilização como barreira impermeabilizando para aterros sanitários, tendo em vista o aumento nas resistências de Pico, pós pico e residual, além do aumento do coeficiente de adensamento (cv) e redução da permeabilidade (k).
The current techniques proposed for the final destination of the tires are not 100 percent efficient, and there is a great deficit of the material in question. Another material that needs an end destination is the PET (polyethylene terephthalate), which nowadays, despite the large amount recycled, needs more disposal options. the present study proposes the use of crushed rubber (in the form of fibers and powder - granulometry of less than 2 mm) in different contents (5 percent and 10 percent, in relation to the dry weight of bentonite) and crushed PET (in the form of fibers and powder), as reinforcement of a bentonite, to increase the resistance parameters of this one. The objective of the research is to evaluate the possibility of using rubber and PET as an improvement of bentonite in geotechnical works, such as waterproofing layers for sanitary landfills, since with the use of rubber and PET in geotechnical works it would be possible to allocate a large volume of these materials. For the development of the experimental study, physical characterization and mechanical characterization tests were performed, such as direct shear tests and densification. With results obtained from the direct shear tests and the densification test, it can be seen that the mixtures B90BF10 and B90PETT10 were more favorable to use as a waterproofing barrier for sanitary landfills, in view of the increase in peak and residual, besides the increase of the coefficient of densification (cv) and reduction of the permeability (k).
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Warley, Russell Lee. "Silica-silicone interactions: Non-linear viscoelastic behavior of silica-filled silicone rubber." Case Western Reserve University School of Graduate Studies / OhioLINK, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=case1057089336.

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Broussard, Dylan W. "Cyclic Behavior of Small Scale Shear Panels Containing Fiber Reinforced Rubber Concrete." Thesis, University of Louisiana at Lafayette, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10002460.

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Shear beams and shear walls were constructed using varying amounts of steel fibers and rubber to determine the effect of these constituents on concrete when subject to shear loads and reversed cyclic loadings. 22 concrete beams were tested using mixes with differing amounts of fibers and rubber. The beams were designed to fail in shear by applying a single downward point load at midspan using a MTS Universal Testing Machine. Using the recorded load and displacement data the behavior of each beam and the shear strength contribution for each mix were determined. For all mixes that included fibers and/or rubber the shear strengths increased 12% to 56% in comparison to the plain concrete mixes. Four concrete walls were also tested using four of the 22 beam mixes. The four selected mixes were chosen based on the comparable compressive strengths and mix constituents. The walls were designed to fail in shear by applying a lateral load to a top block cast on top of the shear wall. The walls were tested on a modular strong-block test system within a rigid steel frame so that the load could be applied by a hydraulic actuator. During testing, the displacement at 10 selected locations, the loads placed on the walls at each displacement, and the behavior were recorded and analyzed. The walls containing rubber experienced lower strengths, a brittle failure with severe spalling and damage, and dissipated a low amount of energy. The walls containing fibers exhibited strain hardening characteristics leading to a ductile failure mode, higher strengths, and little web damage. Using the findings from this study, it can be concluded that both fibers and rubber can be used to increase shear strength but only fibers were found to be a viable option for application in walls subject to reverse cyclic loadings.

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Books on the topic "Rubber behavior"

1

Nagel, Karen Berman. The three young maniacs and the red rubber boots. New York, NY: HarperCollinsPublishers, 1993.

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Viscoelastic behavior of rubbery materials. Oxford: Oxford University Press, 2011.

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Hamilton, Janet L. Natural Rubber: Properties, Behavior and Applications. Nova Science Publishers, Incorporated, 2016.

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Dressing For Pleasure In Rubber Vinyl Leather The Best Of Atomage 19721980. Fuel Publishing, 2010.

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Canevarolo, S. V. Melt behaviour of thermoplastic rubbers. 1986.

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Yatim, Amir-Hashim Md. Effect of natural latex non-rubbers on the vulcanisation and physical behaviour of natural rubber latex films. 1997.

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M. Tahir bin Ab Rahman. Further studies of the stress relaxation behaviour of rubber in compression. 1985.

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Del Socorro Castañeda-Liles, María. The Making of Girls in the Mexican Catholic Imagination. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190280390.003.0005.

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Obedience and respect are typically defined as a positive (both at the level of feeling and as action) toward another person or entity. However, while engaging in this type of behavior may be perceived as positive, this does not necessarily mean that it is a positive experience for women. The performance of obedience and respect can also be actions exercised by a girl who, out of free will or obligation, is moved to not disrupt the status quo imposed by a given culture, society, and religion. The author argues that the Catholic culture in which the mothers socialized the participants also provides the parameters within which they learn how to be good girls in ways that reduces a girl’s agency to rubble.
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Book chapters on the topic "Rubber behavior"

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Bauman, Judson T. "Rubber Stress-Strain Behavior." In Fatigue, Stress, and Strain of Rubber Components, 9–18. München: Carl Hanser Verlag GmbH & Co. KG, 2008. http://dx.doi.org/10.3139/9783446433403.002.

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Freakley, Philip K. "Materials Behavior and Testing." In Rubber Processing and Production Organization, 15–41. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4613-2375-4_2.

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Wiessner, Sven. "Rheological Behavior and Rubber Processing." In Encyclopedia of Polymeric Nanomaterials, 1–10. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-36199-9_304-1.

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Wiessner, Sven. "Rheological Behavior and Rubber Processing." In Encyclopedia of Polymeric Nanomaterials, 2147–54. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-29648-2_304.

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Kelly, James M. "Buckling Behavior of Elastomeric Bearings." In Earthquake-Resistant Design with Rubber, 161–89. London: Springer London, 1997. http://dx.doi.org/10.1007/978-1-4471-0971-6_8.

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Kelly, James Marshall. "Buckling Behavior of Elastomeric Bearings." In Earthquake-Resistant Design with Rubber, 89–105. London: Springer London, 1993. http://dx.doi.org/10.1007/978-1-4471-3359-9_8.

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Li, Yu Ming, Hong Bai Bai, and Jian Zheng. "Deformation Behavior of Metal Rubber Material." In Key Engineering Materials, 571–74. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-456-1.571.

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Kirane, Kedar, and Surita Bhatia. "Structure-Property Relationships for the Mechanical Behavior of Rubber-Graphene Nanocomposites." In Graphene-Rubber Nanocomposites, 109–40. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003200444-5.

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Kelly, James M. "Behavior of Multilayered Bearings Under Compression and Bending." In Earthquake-Resistant Design with Rubber, 131–59. London: Springer London, 1997. http://dx.doi.org/10.1007/978-1-4471-0971-6_7.

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Kelly, James Marshall. "Behavior of Multilayer Bearings Under Compression and Bending." In Earthquake-Resistant Design with Rubber, 69–87. London: Springer London, 1993. http://dx.doi.org/10.1007/978-1-4471-3359-9_7.

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Conference papers on the topic "Rubber behavior"

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Liu, Ruofan, and Erol Sancaktar. "Dual-Stiffness Behavior of Fatigued Tire Rubber." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-47782.

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We report on duality in stiffness values for both carbon black and silica-filled SBR-based (styrene butadiene rubber) tire rubber materials after cyclic loading (and not with no-cycle, neat samples). We believe, this behavior is due to morphological changes occurring due to cycling and not necessarily due to larger scale void/crack initiation. Causes may be chain breakage, reduced crosslinking in all samples, and agglomerate break-up/particle redistribution in silica systems, which represent early damage initiation and morphological changes in these systems. Therefore, we get a dual stiffness vs. strain behavior which is essentially superposition of two separate stiffness vs. strain curves, each being similar to the stiffness-strain curves for the neat (no fatigue) samples. We believe that the second superposed portion represents the sections deteriorated/rearranged due to cyclic loading (lower crosslinking/rearranged particle distributions) coming in-line during the straining process, and when the non-deteriorated/non-rearranged sections weaken.
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Ohta, Takashi, Shigeyuki Ono, Kazuhiko Seki, and Kenya Nakamura. "Study of Rubber Flow Behavior Inside Mold." In SAE 2000 World Congress. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2000. http://dx.doi.org/10.4271/2000-01-0680.

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Giese, Ulrich. "Influence of Fillers on Thermal Oxidative Aging Behavior of Polydienes." In Technical Meeting of the Rubber Division, ACS. Akron, Ohio, USA: Rubber Division, ACS, 2022. http://dx.doi.org/10.52202/067657-0058.

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Narita, Hiromichi, Junji Yoshida, and Kouichi Takeya. "Experimental Investigation of Temperature-dependent Behavior of a Rubber Material for Base-Isolated Bridges under Multi-axial Loadings." In IABSE Conference, Seoul 2020: Risk Intelligence of Infrastructures. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2020. http://dx.doi.org/10.2749/seoul.2020.289.

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<p>This paper investigates temperature-dependent behavior of a natural rubber, which has been employed for bearings of base-isolation. At first, we develop a temperature-bath for our multi-axial loading machine to keep surface temperature of rubber specimens constant. Then, we conduct a series of bi-directional simple shear tests on cylindrical specimens at different temperature levels (- 15, 0, 20, 40, 60 [°C]), various strain amplitudes and strain rates. The experimental results show that stiffness and hysteretic area are gradually reduced with increase of the temperature. This fact indicates that variation of temperature gives effective change to behavior of the rubbers. In the future, we are going to construct a constitutive model of the rubber, based on the stress-strain relations obtained in the experiment.</p>
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Zhang, Linghong, Tianming Gao, Jiao Yang, Hongxing Gui, Ke Chen, and Maofang Huang. "Characterization the rheology behavior of modified skim rubber." In 3rd International Conference on Material, Mechanical and Manufacturing Engineering (IC3ME 2015). Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/ic3me-15.2015.384.

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David, N. V., X. L. Gao, and J. Q. Zheng. "Creep Behavior of a TWARON®/Natural Rubber Composite." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38079.

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The creep behavior of a Twaron CT709® fabric/natural rubber composite under a uniaxial constant stress is studied using three viscoelasticity models with different levels of complexity and a newly developed para-rheological model. The three models employed are a one-term generalized Maxwell (GMn = 1) model (consisting of one Maxwell element and an additional spring in parallel), a two-term generalized Maxwell (GMn = 2) model (including two parallel Maxwell elements and an additional spring in parallel), and a four-parameter Burgers model. The values of the parameters involved in each model are extracted from the experimental data obtained in this study. The creep tests reveal that the axial strain starts to increase exponentially during the primary stage and then continues to equilibrate linearly with time. The results show that the initial creep response of the composite is predicted fairly well by the GMn = 2 model, while the secondary creep is more accurately described by the GMn = 1 model. An implicit solution, together with a characteristic retardation time spectrum, obtained using the para-rheological model is found to provide more accurate predictions of the composite creep response than the three viscoelasticity models at both the primary and secondary stages.
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Tavio, Hidajat Sugihardjo, Agung Purniawan, and Yudha Lesmana. "Behavior of rubber base isolator with various shape factors." In PROCEEDINGS OF THE 3RD INTERNATIONAL CONFERENCE ON CONSTRUCTION AND BUILDING ENGINEERING (ICONBUILD) 2017: Smart Construction Towards Global Challenges. Author(s), 2017. http://dx.doi.org/10.1063/1.5011501.

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Cui, Yanan, and Lan Wang. "High-Temperature Behavior of Compound Crumb Rubber Modified Asphalt." In Third International Conference on Transportation Engineering (ICTE). Reston, VA: American Society of Civil Engineers, 2011. http://dx.doi.org/10.1061/41184(419)341.

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Lee, Changho, Yong-Hoon Byun, and Jong-Sub Lee. "Behavior of Sand-Rubber Mixtures According to Strain Level." In GeoFlorida 2010. Reston, VA: American Society of Civil Engineers, 2010. http://dx.doi.org/10.1061/41095(365)62.

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Zukas, Walter, Michael Sennett, Elizabeth Welsh, Axel Rodriguez, David Ziegler, and Paul Touchet. "PERMEATION BEHAVIOR AND PHYSICAL PROPERTIES OF NATURAL RUBBER NANOCOMPOSITES." In Proceedings of the 24th US Army Science Conference. WORLD SCIENTIFIC, 2006. http://dx.doi.org/10.1142/9789812772572_0061.

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Reports on the topic "Rubber behavior"

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Obata, Makoto, and Yoshiaki Goto. ANALYSIS OF RUBBER BEARING BEHAVIOR WITH MATERIAL DETERIORATION. The Hong Kong Institute of Steel Construction, December 2018. http://dx.doi.org/10.18057/icass2018.p.121.

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Quigley, Claudia J., and Joey L. Mead. Mode I Large Strain Viscoelastic Crack Behavior in Nitrile Rubber Sheets. Fort Belvoir, VA: Defense Technical Information Center, October 1994. http://dx.doi.org/10.21236/ada289984.

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Elmore, Monica, Joe Garner, Brian Richert, Don Lay, Anna K. Johnson, and Ed Pajor. The Impact of Rubber Mats on the Health, Behavior and Welfareof Group-Housed Sows at Breeding. Ames (Iowa): Iowa State University, January 2011. http://dx.doi.org/10.31274/ans_air-180814-773.

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Small, IV, W., and T. Wilson. Crystallization Behavior of Virgin TR-55 Silicone Rubber Measured Using Dynamic Mechanical Thermal Analysis with Liquid Nitrogen Cooling. Office of Scientific and Technical Information (OSTI), February 2010. http://dx.doi.org/10.2172/975213.

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Thornell, Travis, Charles Weiss, Sarah Williams, Jennifer Jefcoat, Zackery McClelland, Todd Rushing, and Robert Moser. Magnetorheological composite materials (MRCMs) for instant and adaptable structural control. Engineer Research and Development Center (U.S.), November 2020. http://dx.doi.org/10.21079/11681/38721.

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Magnetic responsive materials can be used in a variety of applications. For structural applications, the ability to create tunable moduli from relatively soft materials with applied electromagnetic stimuli can be advantageous for light-weight protection. This study investigated magnetorheological composite materials involving carbonyl iron particles (CIP) embedded into two different systems. The first material system was a model cementitious system of CIP and kaolinite clay dispersed in mineral oil. The magnetorheological behaviors were investigated by using parallel plates with an attached magnetic accessory to evaluate deformations up to 1 T. The yield stress of these slurries was measured by using rotational and oscillatory experiments and was found to be controllable based on CIP loading and magnetic field strength with yield stresses ranging from 10 to 104 Pa. The second material system utilized a polystyrene-butadiene rubber solvent-cast films with CIP embedded. The flexible matrix can stiffen and become rigid when an external field is applied. For CIP loadings of 8% and 17% vol %, the storage modulus response for each loading stiffened by 22% and 74%, respectively.
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