frecklets
Mechanical
- Dec 3, 2015
- 1
Hello,
First time on the forum. I am designing a bladder system that has a rectangular-like shape with small pockets of air throughout mass. I am using Abaqus CAE 6.14 with the Fluid Cavity interaction to model the air pockets. My simulation will solve but the results look questionable as it seems the pockets of air are not playing and role in the bladder structure. To test, I varied the ambient pressure inside the air pockets by a factor of 1-1000 and saw no change in the simulation results. Abaqus gives several of the following warning about the cavity volume:
"There is zero CAV. VOL. everywhere in the model based on the default criterion. please check the value of the average CAV. VOL. during the current iteration to verify that the CAV. VOL. is small enough to be treated as zero. if not, please use the solution controls to reset the criterion for zero CAV. VOL.."
I haven't been able to figure out how to change the default criterion for CAV. VOL. I am wondering if, because Abaqus is not recognizing any cavity volume, there is no fluid cavity forces being exerted on the model. I am not sure that changing the default criterion will solve the problem.
Any help would be very appreciated. I have uploaded an inp file if it helps. If other files are needed, please let me know. Thank you!
First time on the forum. I am designing a bladder system that has a rectangular-like shape with small pockets of air throughout mass. I am using Abaqus CAE 6.14 with the Fluid Cavity interaction to model the air pockets. My simulation will solve but the results look questionable as it seems the pockets of air are not playing and role in the bladder structure. To test, I varied the ambient pressure inside the air pockets by a factor of 1-1000 and saw no change in the simulation results. Abaqus gives several of the following warning about the cavity volume:
"There is zero CAV. VOL. everywhere in the model based on the default criterion. please check the value of the average CAV. VOL. during the current iteration to verify that the CAV. VOL. is small enough to be treated as zero. if not, please use the solution controls to reset the criterion for zero CAV. VOL.."
I haven't been able to figure out how to change the default criterion for CAV. VOL. I am wondering if, because Abaqus is not recognizing any cavity volume, there is no fluid cavity forces being exerted on the model. I am not sure that changing the default criterion will solve the problem.
Any help would be very appreciated. I have uploaded an inp file if it helps. If other files are needed, please let me know. Thank you!