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Dynamic deformation of strongly nonlinear toroidal rubber elements
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10.1063/1.4819107
/content/aip/journal/jap/114/8/10.1063/1.4819107
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/8/10.1063/1.4819107
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Equipment set up and schematic presentation of loading assembly and gauges for dynamic testing of o-ring.

Image of FIG. 2.
FIG. 2.

High speed camera images of dynamically deformed Buna-N o-ring (initial outer diameter of o-ring  = 20 mm, mean diameter  = 15 mm, and diameter of circular cross section,  = 5 mm). Drop mass had initial velocity 1.04 m/s.

Image of FIG. 3.
FIG. 3.

Displacements of drop mass and upper piston from optical images recorded by high speed camera and change of compressed o-ring height (). Buna-N o-ring (initial outer diameter of o-ring  = 20 mm, mean diameter  = 15 mm, and diameter of circular cross section,  = 5 mm). Drop mass had initial velocity 1.04 m/s.

Image of FIG. 4.
FIG. 4.

Force history recorded by strain gauges in the load cell together with characteristic times observed from optical images of Buna-N o-ring (initial outer diameter of o-ring  = 20 mm, mean diameter  = 15 mm, and diameter of circular cross section,  = 5 mm). Drop mass had initial velocity 1.04 m/s.

Image of FIG. 5.
FIG. 5.

Comparing force data from an accelerometer and from a load cell with impact velocity of 1 m/s. The similarity between the two measurements demonstrates force equilibrium during dynamic testing. Data correspond to Buna-N o-ring (initial outer diameter of o-ring  = 20 mm, mean diameter  = 15 mm, and diameter of circular cross section,  = 5 mm).

Image of FIG. 6.
FIG. 6.

Velocity of drop mass derived from integration of acceleration values based on load cell data, gravitation force is included. Data correspond to Buna-N o-ring (initial outer diameter of o-ring  = 20 mm, mean diameter  = 15 mm, and diameter of circular cross section,  = 5 mm).

Image of FIG. 7.
FIG. 7.

Comparing the displacement of drop mass derived from a record from strain gauge in a load cell and images recorded by the high speed camera. Data correspond to Buna-N o-ring (initial outer diameter of o-ring  = 20 mm, mean diameter  = 15 mm, and diameter of circular cross section,  = 5 mm). Drop mass had initial velocity 1.04 m/s.

Image of FIG. 8.
FIG. 8.

Displacements of drop mass and upper piston from optical images recorded by high speed camera and change of compressed o-ring height (). The dashed black line is integrated from strain gauge data with correction obtained from the optical images of upper piston movement. Buna-N o-ring (initial outer diameter of o-ring  = 20 mm, mean diameter  = 15 mm, and diameter of circular cross section,  = 5 mm). Drop mass had initial velocity 1.04 m/s.

Image of FIG. 9.
FIG. 9.

Force (from load cell record) over engineering strain (based on change of height of o-ring from optical images), the dynamic response of o-ring corresponding to impact with initial velocity 1.04 m/s. Data correspond to Buna-N o-ring (initial outer diameter of o-ring  = 20 mm, mean diameter  = 15 mm, and diameter of circular cross section,  = 5 mm).

Image of FIG. 10.
FIG. 10.

Engineering strain rate from integrated acceleration based on force measurements by strain gage versus strain (from optical images). Data correspond to Buna-N o-ring (initial outer diameter of o-ring  = 20 mm, mean diameter  = 15 mm, and diameter of circular cross section,  = 5 mm). Drop mass had initial velocity 1.04 m/s.

Image of FIG. 11.
FIG. 11.

Force versus strain, comparing results of linear viscous models and static force with two coefficients with experimental data. Data correspond to Buna-N o-ring (initial outer diameter of o-ring  = 20 mm, mean diameter  = 15 mm, and diameter of circular cross section,  = 5 mm). Drop mass had initial velocity 1.04 m/s.

Image of FIG. 12.
FIG. 12.

Force versus strain for dynamic deformation of o-ring based on Eq. (6) together with static empirical equation (Eq. (3) ) in comparison with experimental results (  = 7.6 MPa and  = 7.5 [KPa s/m]). Data correspond to Buna-N o-ring (initial outer diameter of o-ring  = 20 mm, mean diameter  = 15 mm, and diameter of circular cross section,  = 5 mm). Drop mass had initial velocity 1.04 m/s.

Image of FIG. 13.
FIG. 13.

Dynamic and static equations for force together with experimental result for o-ring (  = 7.6 MPa and  = 7.5 KPa s/m). Buna-N o-ring (initial outer diameter of o-ring  = 23 mm, mean diameter  = 20 mm, and diameter of circular cross section,  = 3 mm). Drop mass had initial velocity 0.6 m/s.

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/content/aip/journal/jap/114/8/10.1063/1.4819107
2013-08-26
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Dynamic deformation of strongly nonlinear toroidal rubber elements
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/8/10.1063/1.4819107
10.1063/1.4819107
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