Effect of Previous Stress-Strain History on the Dynamic Hysteresis Loop for Rubber in Compression

Davies, D.; McCallion, H.

doi:10.1038/173262a0

Cited by 2 publications

(2 citation statements)

References 1 publication

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“…Figure 9d shows the shear force-deformation curves of the bearing samples. The area of the hysteresis loop can reflect the energy dissipation of the bearing samples during shear deformation [26]. The new bearing sample obviously has a larger area of the hysteresis loop.…”

Section: Test Of Isolation Bearings Samples On a Pressure Shear Testimentioning

confidence: 99%

Development of high damping natural rubber/butyl rubber composites compatibilized by isobutylene-isoprene block copolymer for isolation bearing

Li¹,

Zhang²,

Zhao³

et al. 2019

Express Polym. Lett.

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Natural rubber (NR) and butyl rubber (IIR) blends were compatibilized by isobutylene-isoprene block copolymer (IIBC) which was specifically synthesized with a relatively high content of isoprene (14.5% mole fraction). Aiming at high damping elastomers, the IIR acts as the high damping phase dispersed in the natural rubber (NR) matrix in this blend. The morphology and microstructure was characterized by atomic force microscope (AFM) and transmission electron microscope (TEM). The results indicated that the IIBC as a compatibilizer could greatly increase the interfacial thickness. Damping property was studied by dynamic mechanical thermal analyzer (DMTA) and rubber processing analyzer (RPA). The results showed that the loss factor greatly increased with adding IIBC, and this may be due to the improved stress transfer promoting the IIR phase to deform and then dissipate energy. The tensile test demonstrated that the tensile strength and modulus increased when 4 parts per hundred rubber [phr] of IIBC was added. Finally, the NR and new NR/IIR isolation bearing samples were prepared and tested on a pressure shear testing machine that could simulate the actual situation during an earthquake. The results showed that hysteretic loss (for one cycle) of the new NR/IIR sample is 83% higher than that of the NR sample, rendering the compatibilized blends potential in isolation rubber bearings application.

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Section: Test Of Isolation Bearings Samples On a Pressure Shear Testimentioning

confidence: 99%

Development of high damping natural rubber/butyl rubber composites compatibilized by isobutylene-isoprene block copolymer for isolation bearing

Li¹,

Zhang²,

Zhao³

et al. 2019

Express Polym. Lett.

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show abstract

“…5 Understanding hysteresis loss in rubber compounds can provide valuable insight into their performance. As is well known, various factors, such as strain level, [6][7][8] strain rate, 9,10 and strain history, 11 affect the hysteresis loss of a vulcanized rubber. However, most research has been performed using homogeneous rubbers that contain uniformly distributed fillers and have uniform crosslink density.…”

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confidence: 99%

Hysteresis manifestation of graded rubber

Do,

Yamaguchi,

Washizu

et al. 2023

Polymers for Advanced Techs

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In the present study, hysteresis loss in the cyclic stress–strain curves of graded styrene–butadiene rubber (SBR) was compared with that of homogenously crosslinked SBR. The graded SBR was prepared by vulcanization in a temperature gradient, which provided a gradient of crosslink density in the thickness direction of the sheet. The graded SBR had a higher hysteresis loss ratio than the homogenously crosslinked SBR, even though they had similar Young's moduli. The large energy loss must be attributed to the viscous response of the low‐crosslink‐density side of the rubber sheet. After the unloading process, the graded rubber exhibited a large instantaneous residual strain. However, its actual residual strain was small after waiting for a long time, indicating good rubber elasticity, which was attributed to the elastic response of the high‐crosslink‐density side of the rubber.

show abstract

Effect of Previous Stress-Strain History on the Dynamic Hysteresis Loop for Rubber in Compression

Cited by 2 publications

References 1 publication

Development of high damping natural rubber/butyl rubber composites compatibilized by isobutylene-isoprene block copolymer for isolation bearing

Development of high damping natural rubber/butyl rubber composites compatibilized by isobutylene-isoprene block copolymer for isolation bearing

Hysteresis manifestation of graded rubber

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