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Hydrostatic fluid elements: Modeling an airspring

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Airsprings are rubber or fabric actuators that support and contain a column of compressed air. They are used as pneumatic actuators and vibration isolators. Airsprings are considerably more flexible than other types of isolators. The airspring's inflation pressure can be changed to compensate for different loads or heights without compromising isolation efficiency. Static analyses are performed in ABAQUS/Standard. A three-dimensional, half-symmetry model that uses finite-strain shell elements is used to model the rubber spring; three-dimensional, hydrostatic fluid elements is used to model the air-filled cavity; and rebar to model the multi-ply steel reinforcements in the rubber membrane. In addition, a three-dimensional, element-based rigid surface is used to define the contact between the airspring and the lateral metal bead. The cord-reinforced rubber membrane is modeled using a hyperelastic material model with steel rebar. In all analyses the air inside the airspring cavity has been modeled as a compressible or “pneumatic” fluid satisfying the ideal gas law.

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linear actuator said…
Valve actuators are really needed for complex tasks in the high power market.If the load requires accurate positioning, the electric actuators as well as the valve actuators has the advantage among others.That is why,to familiarize yourself in this kind of industrial application , knowing how an automation works is a wisely action and will positively keep us in track.
June 24, 2009 at 3:24 AM
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