Frictionless SLIPRING connectors
Elements tested
CONN3D2
Problem description
The SLIPRING connection type is verified via a frictionless pulley and inextensible belt system. Results are compared against well-known analytical results.
A high elastic modulus is specified for the belt of the SLIPRING via the connector elasticity procedure to achieve inextensible behavior. The analysis compares the results of two separate pulley-belt systems, each displacing similar loads though the same distance. Each system models the belt passing over the pulley using two SLIPRING connector elements sharing a common node. A load of 10 units is applied at the common node of the SLIPRING-type connector elements. In each system one of the ends of the belt is fully fixed, and different sets of boundary conditions are applied at the other free end to displace the applied load by similar distance, as described below.
System 1:
Apply boundary conditions to constrain degrees of freedom 1, 2, 3, and 10 (the material flow degree of freedom) at the left end of the belt system.
Apply boundary conditions at the right end to constrain degrees of freedom 1, 2, and 3.
Apply velocity-type boundary conditions on degree of freedom 10 at the free end (to pull out 2.25 units of belt material).
System 2:
Apply boundary conditions to constrain degrees of freedom 1, 2, 3, and 10 at the left end of the belt system.
Apply boundary conditions at the right end to constrain degrees of freedom 1, 3, and 10.
Apply velocity-type boundary conditions on degree of freedom 2 at the free end (to displace the node by 2.25 units).
Results and discussion
The load displaces by 1.125 units in both systems, which is half the 2.25 unit length of belt material pulled out at the free end, a well-known analytical result. The belt tension in each SLIPRING is 5 units, half the 10 unit load applied to each system and again matching analytical results. In all cases the material flowing out of the first connector element equals the material flowing into the second connector element.
Input files
Abaqus/Standard input file
- misc_elasslipring_std_conn3d.inp
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SLIPRING with linear elastic connector behavior.
Abaqus/Explicit input file
- misc_elasslipring_xpl_conn3d.inp
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SLIPRING with linear elastic connector behavior.