Creep deformation

Hi, 
I am now doing the simulation of creep deformation. I would like to
apply the load in a very short time and then keep this condition for a
period of time, say 1000Hours. Now I devided the whole process into
several  steps to make this happen. What I am not very sure is,after
loading the BC should be changed and this change will last with time.
Is there a way to deal with this?how?

Thanks.








------------------------ Yahoo! Groups Sponsor --------------------~--> 
$9.95 domain names from Yahoo!. Register anything.
http://us.click.yahoo.com/J8kdrA/y20IAA/yQLSAA/PMYolB/TM
--------------------------------------------------------------------~->