Property profile of a laminated rubber bearing

Othman, Alias

doi:10.1016/s0142-9418(00)00017-9

Cited by 29 publications

(8 citation statements)

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“…In 2001, Othman et al [2] studied laminated rubber bearings consisting of alternate layers of rubber and metal plates. He found that prolonging exposure to heat may affect the physical properties of rubber.…”

Section: Introductionmentioning

confidence: 99%

Tribological Performance of a Polymer Blend of NBR Used for Stern Bearings

Qin¹

2012

TOMEJ

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Nitrile-butadiene rubber (NBR) and another polymer with an excellent self-lubricating property are blended to develop a new kind of polymer used for water-lubricated stern bearings. The tribological performance of the new Polymer Blend of NBR (PBN), with the comparison of a rubber common used for most stern bearings, was studied using a stern bearing test rig of SSB-100. The results showed that the friction coefficients of PBN are lower than those of NBR under water-lubricated conditions. And the difference is the most evident at speeds of 0.1 ~ 2.0m/s. So PBN will change to Plasto-Elastohydrodynamic (PEH) Lubrication at lower speed to reduce the critical speed of bearing squeal. This indicates blending rubber with other polymers is an effective means to develop low-friction stern bearing materials. Furthermore, test results revealed that reducing the rubber layer thickness and hardness will reduce the friction coefficients. So in the structure design of water-lubricated rubber bearings, selecting proper structural parameter will improve the tribological performance.

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Section: Introductionmentioning

confidence: 99%

Tribological Performance of a Polymer Blend of NBR Used for Stern Bearings

Qin¹

2012

TOMEJ

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“…The profile of the laminated rubber bearing was studied [1], and the mechanical properties of the isolation bearings were identified by using a visco-elastic model [2]. A macroscopic model for predicting the large-deformation behaviors of the laminated rubber bearing had been researched [3], and a study on the response during large deformation under seismic isolation was conducted [4], as well as the seismic performance of base-isolated structures using a shaking table and a pseudo-dynamic test was evaluated [5].…”

Section: Introductionmentioning

confidence: 99%

Dynamic response characteristics of seismic isolation systems for building structures

Kang

2009

J Mech Sci Technol

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Isolation is an effective method of reducing effects of seismic events on building structures. Steel-reinforced elastomeric isolator (SREI) is one kind of isolation system which is used extensively, but there are some problems associated with its use, such as cost and weight. Fiber-reinforced elastomeric isolator (FREI) has been developed in an attempt to solve the problems of high cost and heavy weight for SREI. In this study, mechanical properties for the SREI and the FREI are investigated. Systematic dynamic response analyses are performed for three different models such as a fixed based, an SREI based and an FREI based low-story building structures. Two-dimensional and threedimensional dynamic response analysis results for each model are compared in terms of displacement, drift, acceleration and shear force in this study. In the two-dimensional dynamic response analysis, the SREI and the FREI based structures are proven to be the more effective isolation systems against seismic events by comparing with the fixed based one. As a result, the FREI has shown better isolation performances than that of the SREI. Furthermore, to extract the characteristics of the FREI on building structure resisting the seismic effects, two models of three-dimensional framed structure with fixed bases and FREI isolated bases are built, respectively. After the dynamic response analysis of these two structures subjected to bi-directional ground motions, the analyzed results are compared with each other. It is shown that the FREI could effectively absorb the seismic energy, and decreases the destructive effects acting on a building structure due to ground horizontal motions that could occur in an earthquake.

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“…Compression set is a measure of the capacity of the rubber to retain their elastic properties after prolonged compression at a constant strain under a specified set of conditions, and it is a permanent set of rubber compounds . As a rubber material is compressed over time, it loses its ability to return to its original thickness.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of mechanical, thermal, electrical, and transport properties of MWCNT‐filled NR/NBR blend composites

Thomas

George²

2017

Polymer Engineering & Sci

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Carbon nanotube based polymer nanocomposites found versatile applications and hence studying its reinforcing effect on NR/NBR blend system is a promising step in developing flexible elastomer gadgets. In this study, attempts have been made to prepare multi-walled carbon nanotube (MWCNT)-filled nanocomposites of NR/NBR blends. Raman spectra and transmission electron microscopic analysis indicate that there has been a finer and uniform dispersion of carbon nanotubes within the polymer matrix. Mechanical properties like tensile strength, tear resistance, abrasion loss and compression set of pure and blend samples showed an improvement with the increase in the dosage of MWCNT from 0.5 to 4 phr. 70/30 NR/NBR blend with 4 phr of MWCNT showed an improvement of 83% in tensile strength and 72% in tear strength compared to pure NBR. This is attributed to the uniform dispersion, high surface area, nano level interaction, and compatibility of MWCNT with the polymeric molecular chains. MWCNT is acting as a compatibilizing agent as is manifest from the increased negative values of free energy. Electrical conduction and thermal stability of the mixes were increased with the concentration of MWCNT due to the increase in the interfacial interaction resulting from the pi-pi interaction with the nanotubes. POLYM. ENG. SCI., 58:961-972, 2018. V C 2017 Society of Plastics Engineers CHARACTERIZATION PROCEDURES Evaluation of Cure PropertiesThe optimum cure time (t 90 ) of the mixes (time to reach 90% of maximum torque) was determined on a Gottfert

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Property profile of a laminated rubber bearing

Cited by 29 publications

References 0 publications

Tribological Performance of a Polymer Blend of NBR Used for Stern Bearings

Tribological Performance of a Polymer Blend of NBR Used for Stern Bearings

Dynamic response characteristics of seismic isolation systems for building structures

Evaluation of mechanical, thermal, electrical, and transport properties of MWCNT‐filled NR/NBR blend composites

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