The Dynamic Characteristics of O-Rings

Smalley, A. J.; Darlow, Mark S.; Mehta, Ruhi

doi:10.1115/1.3453877

Cited by 19 publications

(24 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Stiffness and damping coefficients increase both with diameter and cross diameter Φ, although the influence of Φ is almost negligible when is high. This is in accordance with data of paper [10], in which the influence of the cross section diameter is negligible with an O-ring of internal diameter of about 73 mm. Literature data on these coefficients are very difficult to be found.…”

Section: Frequency Dependence the Results Are Summarized Insupporting

confidence: 78%

“…Considering that stiffness and damping should increase with the Shore hardness and with both and Φ, coefficients from [11] are compatible with that of = 41 mm, as their Shore hardness and their cross section diameter are lower. Furthermore the coefficients from [10] are greater than that of = 41 mm and squeeze 15% and also this comparison is good. Considering that the sensitivity of rubber properties on temperature is very high, the discrepancies on the data from different test benches are acceptable.…”

Section: Frequency Dependence the Results Are Summarized Inmentioning

confidence: 70%

“…Literature data on these coefficients are very difficult to be found. Table 6 shows details about O-rings from [10,11] tested with the mass resonant method. Figure 8 compares these results with that of the present paper, with Viton material and a squeeze level of 15%.…”

Section: Frequency Dependence the Results Are Summarized Inmentioning

confidence: 99%

“…In [18] axial forces transmitted by O-rings subjected to a reciprocating drag were measured for various amplitudes and frequencies. Papers [10,19] describe some test benches used to measure the viscoelastic properties of O-rings. In paper [20] a simplified approach for the proper selection of elastomers is proposed.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Dynamic Characterization of Rubber O-Rings: Squeeze and Size Effects

Al‐Bender

Colombo

Reynaerts

et al. 2017

Advances in Tribology

View full text Add to dashboard Cite

This paper concerns the dynamic characterization of rubber O-rings used to introduce damping in high speed gas bearing systems. O-shaped rubber rings composed of high temperature rubber compounds are characterized in terms of stiffness and damping coefficients in the frequency range 100-800 Hz. Simple formulas with frequency independent coefficients were identified to express the viscoelastic properties of the O-rings. The formulas proposed approximate the stiffness and damping coefficients of O-rings of general size.

show abstract

Section: Frequency Dependence the Results Are Summarized Insupporting

confidence: 78%

Section: Frequency Dependence the Results Are Summarized Inmentioning

confidence: 70%

Section: Frequency Dependence the Results Are Summarized Inmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dynamic Characterization of Rubber O-Rings: Squeeze and Size Effects

Al‐Bender

Colombo

Reynaerts

et al. 2017

Advances in Tribology

View full text Add to dashboard Cite

show abstract

“…Hence, analytical prediction of the dynamic properties of rubber components has not been successfully achieved so far. Instead, the dynamic properties of O-rings have been measured experimentally using the actual O-ring structure (Belforte et al 2008;Smalley 1977;Smalley, Darlow, and Mehta 1978;Tomioka and Miyanaga 2008;Darlow and Zorzi 1981;Al-bender et al 2017). These studies clarified that the material, temperature, vibration frequency, and amplitude have significant effects on the high-frequency viscoelasticity of rubber materials.…”

Section: Introductionmentioning

confidence: 99%

Calculation of high-frequency dynamic properties of squeezed O-ring for bearing support

Shoyama

Fujimoto

2018

Mechanical Engineering Journal

View full text Add to dashboard Cite

Determination and prediction of the dynamic properties of an O-ring for bearing support were performed. Utilizing O-rings as supporters of bearing is a promising way to suppress severe vibrations such as resonance and self-excited whirl experienced in high-speed turbo machinery. However, analytical prediction of the dynamic properties of O-rings has not been very successful so far because of its non-linear dependence on many parameters. In this study, focusing on the incompressibility of rubber materials, the isochoric shear viscoelasticity of an O-ring material was measured for high frequencies of up to 1 kHz. In measuring the viscoelasticity, a testing method developed by the authors was used. This method enables obtaining high-frequency shear viscoelasticity directly without assuming the temperature-frequency superposition principle. The obtained dynamic shear properties were modeled as functions of the frequency and hydrostatic pressure. Finite element models of squeezed O-rings were constructed with the material model assuming uniform property distribution, and dynamic analyses were conducted. The dynamic properties of O-rings were determined from the time-series data for the applied force and displacement. The data agreed with the experimental results of an actual O-ring. It was found that the dynamic properties of rubber components can be analytically predicted by considering the frequency and hydrostatic pressure dependence on the viscoelasticity.

show abstract