Time interval applying a force

[dondhg]

Hi!

First of all excuse me for my bad english. I've been reading this forum and helped me a lot of times but, i have a problem:

I do a simple static analisys to test a plate deformation (a plate mounted in contact with 2 simple beams). And all is perfect. I can check de total translation and the FS. But, I have a question:

How can I apply a force for, for example, 20 seconds and after that time stop apply the force? Because of i need to know if the plate has temporal deformation (when apply the force) or not.

Thanks in advance and again, excuse me for my bad english.