Model cannot proceed at all after switching to force load
Model cannot proceed at all after switching to force load
(OP)
Hi all,
I have a very small model that runs perfectly under displacement loads. However, when I switched to force loads, the model cannot even move one step at all. Would you please help me with this?
Thanks!
Attachment: the inp file
https://copy.com/8mpoUT8BtjfS
Figure 1. The model runs smoothly under displacement load

Figure 2. The force exceeds 1 newton under displacement load, therefore my load is not too high

I have a very small model that runs perfectly under displacement loads. However, when I switched to force loads, the model cannot even move one step at all. Would you please help me with this?
Thanks!
Attachment: the inp file
https://copy.com/8mpoUT8BtjfS
Figure 1. The model runs smoothly under displacement load
Figure 2. The force exceeds 1 newton under displacement load, therefore my load is not too high





RE: Model cannot proceed at all after switching to force load
RE: Model cannot proceed at all after switching to force load
Oh man thank you sooo much! It is so obvious but I didn't think of it. I realized that the numerical singularity is coming from the contact (from the .msg file, the solver does not realize the contact at all). I tried to add a small force to push it into contact but it didn't work (still singular). This is so obvious but I did not think of it until you mentioned... Thanks a lot man!
It now worked perfectly.
-Shawn