FEAP User Forum

FEAP => Input File Issues => Topic started by: halleluja on May 05, 2019, 10:50:01 AM

Title: contant speed moving boundary condition?
Post by: halleluja on May 05, 2019, 10:50:01 AM

Hi everyone,

i want to do a simulation of metal-cutting. So the workpiece or the cutting-tool will move in a contant speed. How can i define a boundary condition and an initial condition?


Best

Title: Re: contant speed moving boundary condition?
Post by: Prof. R.L. Taylor on May 05, 2019, 03:25:05 PM

You should be able to move any "fixed" node with a displacement that has a proportional load that has the time function you want.

Title: Re: contant speed moving boundary condition?
Post by: halleluja on May 06, 2019, 04:29:35 AM

Thanks for your reply.

What i want to do is simulation of a transient probelm. So i need to define the initial velocity and displacement of all nodes.

If i ONLY move some nodes with a displacement that has a proportional load, the initial velocity and the initial displacement of all nodes have a default value ZERO?

Best


of the rest nodes is ZERO and the initial acceleration of all nodes is ZERO too?

Title: Re: contant speed moving boundary condition?
Post by: Prof. R.L. Taylor on May 06, 2019, 12:25:41 PM

You can use the INIT RATE command, see user manual "Initial Conditions" section.

With this you can set the initial velocity for all or part of the nodes.