Study on dynamic mechanical properties of O-ring with large ring diameter ratio based on metal rubber

Abstract The demand for High temperature resistant metal rubber seals (MRS) with large ring-to-diameter ratio is very urgent in the industrial field. In this work, an O-type MRS with a large ring-to-diameter ratio was developed by embedding the spiral network metal rubber into the stainless steel ring with a special preparation process. The effects of frequency, porosity, and amplitude on the dynamic experimental performance of O-type MRS were studied in detail. The mechanical properties of the MRS were characterized by dynamic tests, and the damping sensitivity were analyzed by orthogonal tests. The results show that MRS has better stability under different frequencies of vibration. The energy consumption and loss factor of the sample increase with increases of porosity. With an increase in loading amplitude, the energy consumption and loss factor of the same porosity test sample increases, whereas the dynamic average stiffness of the specimen gradually decreases. Furthermore, the range analysis of the orthogonal experiment shows that the factors affecting the damping performance of the seal are porosity>amplitude>frequency. This study fills in the dynamic mechanical properties of O-shaped MRS, and provides a certain foundation for the engineering application of O-shaped MRS.

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Study on the Mechanical Properties of Metal Rubber Inner Core of O-Type Seal with Large Ring-to-Diameter Ratio

Advances in Materials Science and Engineering ◽

10.1155/2020/2875947 ◽

2020 ◽

Vol 2020 ◽

pp. 1-12

Author(s):

Yangyang Yang ◽

Zhi Ying Ren ◽

Hongbai Bai ◽

Ding Shen ◽

Bin Zhang

Keyword(s):

Mechanical Properties ◽

Energy Dissipation ◽

Loss Factor ◽

Diameter Ratio ◽

Raw Material ◽

Uniaxial Tensile ◽

Heat Treated Sample ◽

Large Ring ◽

Uniaxial Tensile Testing ◽

Metal Rubber

In view of the problems of ordinary rubber seals, such as high- and low-temperature resistance, easy aging, and insufficient load-bearing performance, O-type metal rubber seals with large ring-to-diameter ratio were prepared by the cold stamping method using stainless steel wire as raw material. The effects of heat treatment and porosity on the compression and tensile properties of test samples were investigated. Under uniaxial compression testing, it was found that the test sample had typical hysteresis characteristics, and the loss factor and energy dissipation of the sample with the same size and different porosity increased with the decrease of porosity. The loss factor and energy dissipation of the heat-treated sample were lower than those of the untreated sample. Thus, the smaller the porosity, the greater the change of loss factor and energy dissipation. Under uniaxial tensile testing, obvious stage changes were found during the tensile process, which included a linear elasticity stage, the formation and development stage of wire breakage, the one-by-one fracture stage of wires, and the complete failure stage of the sample. The yield strength, ultimate tensile strength, and modulus of elasticity of four samples with different porosity were measured, and it was found that the three parameters increased with the decrease of porosity. Moreover, the thermal treatment conductivity increased with the decrease of porosity. The aforementioned three parameters were generally increased. This indicated that metal rubber materials have good mechanical properties under high-temperature environments, which effectively solves the problem of vulnerability to aging and failure of ordinary rubbers under normal working conditions and has strong practical engineering significance.

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Experimental Investigation on the Electrical and Dynamic Mechanical Properties of PMN/Electrically Conductive Carbon Black/Butyl Composites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.351.171 ◽

2007 ◽

Vol 351 ◽

pp. 171-175 ◽

Cited By ~ 3

Author(s):

Yan Bing Wang ◽

Zhi Xiong Huang ◽

Yan Qin ◽

Ming Du ◽

Lian Meng Zhang

Keyword(s):

Mechanical Properties ◽

Carbon Black ◽

Loss Factor ◽

Dynamic Mechanical Properties ◽

Polymer Materials ◽

Electrically Conductive ◽

Dynamic Mechanical ◽

Temperature Range ◽

Conductive Carbon Black ◽

Three Phase

In this paper, a three-phase composite with electrically conductive carbon black (ECCB) and piezoelectric ceramic particles, PMN, embedded into butyl (PMN/ECCB/IIR) was prepared by simple blend and mold-press process. Dynamic mechanical properties with various ECCB loading were tested by dynamic mechanical analysis (DMA). DMA shows that the ECCB loading has remarkable effect on the dynamic mechanical properties of the three-phase composite. The temperature range of loss factor (tanδ) above 0.3 the composite was broadened by almost 100°C and the maximum of loss factor shifts to higher temperature in the testing temperature range respectively with increasing the ECCB loading. The piezoelectric damping theory was used to explain the experimental results. The three-phase composites with proper composition can be used as high damping polymer materials.

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Static and Dynamic Mechanical Properties of Chlorobutyl Rubber Composites with Variable Sulfur/Accelerator Ratio

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.284-286.1938 ◽

2011 ◽

Vol 284-286 ◽

pp. 1938-1941

Author(s):

Yan Bing Wang ◽

Hao Yan ◽

Zhi Xiong Huang

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Tensile Properties ◽

Loss Factor ◽

Dynamic Mechanical Properties ◽

Rubber Composites ◽

Dynamic Mechanical ◽

Chlorobutyl Rubber

The Composite based on CIIR and variable sulfur/accelerator ratio were prepared by compounding and vulcanizing process. Tensile properties and dynamic mechanical properties of CIIR were studied. The results indicate that tensile strength and loss factor are influenced by sulfur/ accelerator ratio. Tensile strength and modulus are improved with increasing sulfur/accelerator ratio while loss factor decrease with increasing sulfur/ accelerator ratio.

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Investigation of Mechanical and Damping Performances of Cylindrical Viscoelastic Dampers in Wide Frequency Range

Actuators ◽

10.3390/act10040071 ◽

2021 ◽

Vol 10 (4) ◽

pp. 71

Author(s):

Teng Ge ◽

Xing-Huai Huang ◽

Ying-Qing Guo ◽

Ze-Feng He ◽

Zhong-Wei Hu

Keyword(s):

Mechanical Properties ◽

Energy Consumption ◽

Loss Factor ◽

Dynamic Mechanical Properties ◽

Wide Frequency Range ◽

Equivalent Stiffness ◽

Frequency Range ◽

Viscoelastic Damper ◽

Equivalent Damping ◽

Viscoelastic Dampers

This paper aims to develop viscoelastic dampers, which can effectively suppress vibration in a wide frequency range. First, several viscoelastic materials for damping performance were selected, and different batches of cylindrical viscoelastic dampers were fabricated by overall vulcanization. Second, the dynamic mechanical properties of the cylindrical viscoelastic dampers under different amplitudes and frequencies are tested, and the hysteretic curves under different loading conditions are obtained. Finally, by calculating the dynamic mechanical properties of the cylindrical viscoelastic dampers, the energy dissipation performance of these different batches of viscoelastic dampers is compared and analyzed. The experimental results show that the cylindrical viscoelastic damper presents a full hysteretic curve in a wide frequency range, in which the maximum loss factor can reach 0.57. Besides, the equivalent stiffness, storage modulus, loss factor, and energy consumption per cycle of the viscoelastic damper raise with the frequency increasing, while the equivalent damping decreases with the increase of frequency. When the displacement increases, the energy consumption per cycle of the viscoelastic damper rises rapidly, and the equivalent stiffness, equivalent damping, storage modulus, and loss factor change slightly.

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Analysis of the dynamic mechanical property of multiple direction impact protection structure inspired by C60 molecule

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406219862302 ◽

2019 ◽

Vol 233 (17) ◽

pp. 5919-5932

Author(s):

Xinhui Shen ◽

Jinguo Liu ◽

Pengwei Zhang ◽

Zhiyu Ni ◽

Yuwang Liu

Keyword(s):

Molecular Structure ◽

Mechanical Properties ◽

Mechanical Property ◽

Dynamic Mechanical Properties ◽

Diameter Ratio ◽

Dynamic Mechanical Property ◽

Dynamic Mechanical ◽

Good Ability ◽

Impact Protection ◽

Hollow Ball

The natural structures have excellent dynamic mechanical properties. In this work, an impact protection structure inspired by the C60 molecule was proposed. And a model of a hollow ball protected by the bio-inspired C60 molecular structure during a drop testing was built. For the bio-inspired C60 molecular structure, the drop process and the dynamic mechanical property was investigated by LS-DYNA software. The results indicate that the bio-inspired C60 molecular structure has a good ability to protect against impact. Furthermore, the effects of the diameter ratio, materials, drop height, and angle were discussed. These variations of geometry and material can influence the dynamic mechanical properties of the bio-inspired C60 molecular impact protection structure.

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