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CONN3D Element witt *CONNECTOR MOTION - How to stop when reach certain force limit

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nabilishes

Mechanical
Jan 23, 2011
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Hi,

Is it possible to add a *CONNECTOR LOCK to a CONN3D Element (type Axial) to make it stop when it reaches certain forces limit?
The CONN3D element is applied with a *CONNECTOR MOTION. This element is connected to a solid indenter via MPC and used for indentation analysis.

I've tried the following but my when i check the connector forces CTF1 values, it goes beyond my set limit of 300N

*CONNECTOR SECTION, ELSET=P49002001;Load_Application_CONNECTOR, BEHAVIOR=M49002001;Load_Application_CONNECTOR
AXIAL,
*CONNECTOR BEHAVIOR, NAME=M49002001;Load_Application_CONNECTOR
*CONNECTOR LOCK, COMPONENT=1, LOCK=ALL
, , -300., 300.
*CONNECTOR ELASTICITY, COMPONENT=1, NONLINEAR
300., 0., 0.
300., 20., 0.
0., 100., 0.

in *STEP, the CONN3D element is applied with *CONNECTOR MOTION with 20mm displacement as below:
*CONNECTOR MOTION
CONNECTOR_ELSET, 1, 20

The current result shows the connector forces (CTF1) go beyond the limit of 300N until the motion 20mm is reached. Then the step ended.
I want the *CONNECTOR MOTION to stop when it reaches 300N.

 
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Try running this with double precision. Also, make sure that the nonlinear elastic behavior is correctly specified. And check output files for warnings.
 
I removed the non-linear elastic behaviour and the test came out the same.
I also ran several tests and got to a conclusion that Connector CONN3D Type AXIAL, when given or applied with *CONNECTOR MOTION, will not obey the force limit applied in the *CONNECTOR LOCK. The motion displacement gets the priority.
 
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