Re: Re: Repeated Drop

Thans Dan.
I have read the manual about initial conditions and import. As far as I know, 
an explicit analysis cannot be transferred to anaother explicit analysis. 
Implicit to explicit or vice versa is possible. Please correct me if I am wrong.
My current strategy is to output the deformed state (output stresses, and 
displacements, plastic strain) into .fil, and read them back using subroutine 
HKSMAIN. I will used the displacements as my coord for the nodes, and use 
*INITIAL CONDITION, TYPE=STRESS and *INITIAL CONDITION, TYPE=HARDENING (for 
plastic strain) to define initial conditions of the second or subsequent 
analyses. I will have to run a dummy step to ensure equilibrium of stresses in 
my second and subsequent analyses.
To be more accurate, I wonder:
1) Whether this strategy is feasible? Is there a better way.
2) How would the elements interpret the strains? I have failure strain 
criterion. How do I deal with the residual strain in the second and subsequent 
analysis?
3) Most importantly, I have shells, and membranes too. How about all those 
section forces and moments?
If you are out there and see this message, please kindly help out. 
Thanks
Kok

Dan <daileyd@xxxxxxxxxxxxx> wrote:


Read about using *import and *initial conditions in the manuals. I 
believe that the deformed state is read in via the odb file not the 
dat file.  You may need to run through a 'dummy' implicit job before 
importing the results of an explicit job into another. Please read 
sect 7.7.2 in the user Abaqus Analysis User's Manual.

Dan Dailey


--- In ABAQUS@xxxxxxxxxxxxxxx, "cheekuangkok" <cheekuangkok@xxxx> 
wrote:
> 
> 
> Hi Abaqus users,
>    I would like to simulate the drop of an object to a rigid floor, 
> let it bounce back a bit, stop the analysis. With this deformed 
> state after the drop, I will bring the object back to its original 
> initial velocity (as in the first analysis), and drop the object 
> again.
>    What is the best way to simulate this repeated drop? I am using 
> ABAQUS/explicit (there is no dat file produced). How do I read in 
> the deformed state into the new analysis? Thanks!
> 
> Chee Kuang Kok
> Graduate student
> Michigan State University