iyj
Mechanical
- Jan 27, 2010
- 26
Dear All
After Rob's suggestion I am making this a new thread and including the original question and answers from the previous thread.
Before I start my question, I would like to appreciate the efforts of people helping each other, thats reallt great.
My question is that I am trying to model a 2D contact problem (indentation of a steel sphere on rectangular Alimunium plate). Now as I am a beginner. I have modeled the plate with Aluminium properties and steel with its properties. Made contact with each other and defined steps and applying displacement load on top of the indentor. The application runs successfully. But what I am trying to achieve is that it shows the deformation when applying load on it. But i also want to see when we remove the indentor how much deformation remains after unloading. So the problem is unloading and do i have to create a seperate step for that, and if i do, both part will still be in contact so how do i do that.
please do help me in this regard as I am really struggling.
Thanking you in advance
rstupplebeen (Mechanical) 28 Jan 10 9:19
For future reference this should be in a new thread.
You can do this a couple of different ways. Create a new step and have the displacement go back to zero. Or, Create an amplitude that the displacement references that ramps from 0-1-0 for time points 0-.5-1.
You will need to include plastic deformation for the aluminum plate otherwise you should have no residual stresses.
I hope this helps.
Rob Stupplebeen
iyj (Mechanical) 31 Jan 10 2:20
Dear Rob
I thank you alot for these helping comments and suggestions. I will try these out and will let you know the outcome too. Once again thanks alot and really appreciate your effort.
Best Regards
iyj (Mechanical) 31 Jan 10 7:04
Dear Rob
It really worked I am so happy, thanks alot really thanks. While attempting the case there was a minor issue and that was when it was unloading it was not going to its original place. like fist displacent i gave was (U2= -0.05, ), and the second BC was U2 = 0, rest remain unchanged. i wanted to to see the final force comning back to zero. The plastic thing really worked, thanks.
Please do let me know where i am wrong.
Regards
iyj (Mechanical) 1 Feb 10 6:11
Dear Rob
In the second step which is the unloading, instead of force going back to zero it actually increases. I already gave the displacement(U2=0) for the final step, but still this problem occurs. Do I have to disconnect both the parts so there is no contact in between them. if yes How do I do that?. Can you please let me know.
Or if not plz can you correct me where I am wrong
Thanking you in advance
Regards
After Rob's suggestion I am making this a new thread and including the original question and answers from the previous thread.
Before I start my question, I would like to appreciate the efforts of people helping each other, thats reallt great.
My question is that I am trying to model a 2D contact problem (indentation of a steel sphere on rectangular Alimunium plate). Now as I am a beginner. I have modeled the plate with Aluminium properties and steel with its properties. Made contact with each other and defined steps and applying displacement load on top of the indentor. The application runs successfully. But what I am trying to achieve is that it shows the deformation when applying load on it. But i also want to see when we remove the indentor how much deformation remains after unloading. So the problem is unloading and do i have to create a seperate step for that, and if i do, both part will still be in contact so how do i do that.
please do help me in this regard as I am really struggling.
Thanking you in advance
rstupplebeen (Mechanical) 28 Jan 10 9:19
For future reference this should be in a new thread.
You can do this a couple of different ways. Create a new step and have the displacement go back to zero. Or, Create an amplitude that the displacement references that ramps from 0-1-0 for time points 0-.5-1.
You will need to include plastic deformation for the aluminum plate otherwise you should have no residual stresses.
I hope this helps.
Rob Stupplebeen
iyj (Mechanical) 31 Jan 10 2:20
Dear Rob
I thank you alot for these helping comments and suggestions. I will try these out and will let you know the outcome too. Once again thanks alot and really appreciate your effort.
Best Regards
iyj (Mechanical) 31 Jan 10 7:04
Dear Rob
It really worked I am so happy, thanks alot really thanks. While attempting the case there was a minor issue and that was when it was unloading it was not going to its original place. like fist displacent i gave was (U2= -0.05, ), and the second BC was U2 = 0, rest remain unchanged. i wanted to to see the final force comning back to zero. The plastic thing really worked, thanks.
Please do let me know where i am wrong.
Regards
iyj (Mechanical) 1 Feb 10 6:11
Dear Rob
In the second step which is the unloading, instead of force going back to zero it actually increases. I already gave the displacement(U2=0) for the final step, but still this problem occurs. Do I have to disconnect both the parts so there is no contact in between them. if yes How do I do that?. Can you please let me know.
Or if not plz can you correct me where I am wrong
Thanking you in advance
Regards