Learning Forum

[heloisehml]

Hello,

I put in place a simulation where a 25mm diameter punch must go through a composite plate (10*10mm).

I put the velocity of the punch to 0.0006mm/s and the end time to 60seconds because that is how it goes in real life. The problem is that I don't know why it takes forever to solve. I am new to Ansys so maybe my settings are wrong. I am desperately seeking for help.

the composite sample is on a steel plate that is used for support which has a 32mm diameter hole in its center.

Thank you in advance for your help.

[peteroznewman]

n1) Configure the CAD so that the punch is touching the sample.n2) Speed up the velocity by 1000 times.n3) Reduce the end time by 1000 times.n4) It looks like your composite material has only 1 element through the thickness. That is unacceptable. You need tens of elements through the thickness.n

[djtan]

This is more like quasi-static simulations since the speed is so low and the time duration is quiet large, explicit will take a long long long time to solve it, ninstead what u can try is to increase the velocity and reduce the time nI've come across this yesterday and it very helpful (sorry i don't know how to insert a hyperlink)nnThis is more like quasi-static simulations since the speed is so low and the time duration is quiet large, explicit will take a long long long time to solve it, ninstead what u can try is to increase the velocity and reduce the time nI've come across this yesterday and it very helpful (sorry i don't know how to insert a hyperlink)nne n

[heloisehml]

@heloisehml 1) Configure the CAD so that the punch is touching the sample.2) Speed up the velocity by 1000 times.3) Reduce the end time by 1000 times.4) It looks like your composite material has only 1 element through the thickness. That is unacceptable. You need tens of elements through the thickness./forum/discussion/comment/100471#Comment_100471

But isn't changing the velocity and end time changing the whole simulation thus giving me the wrong results? It is normal the meshing only shows one layer but i did put some (16 of carbon and 1 Honeycomb) - I don't know why it shows one layer.n

[peteroznewman]

nRun a series of simulations where you change the velocity and end time by a factor of 100, 1000, 10000, 100000.nPlot the Total Energy and the Kinetic Energy on each simulation.nWhen Kinetic Energy is a very small percentage of the Total Energy, the simulation is very close to quasi-static.nWhen Kinetic Energy is a significant percentage of the Total Energy, then the simulation is no longer quasi-static.n

[Omkar Bharambe]

Hi guys, I have a similar problem, but in Ansys Motion. I am doing a dynamics simulation for a manipulator and it's taking forever to converge.


I am new to ansys motion and would like suggestions if you have any. The simulation progress looks like this: