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Ideas for smoothing solid-flex contacts (PSHELL)?

erik_spe
Attached model drags a simple block across a simple flexible plate's surface. Force is too unsteady to be of any use. Even with flexbody rigid, force is unsteady.
 
I've noticed using SI2 solver dramatically helps, but hoping someone out there has other tricks up their sleeve (other than just softening the contact parameters).
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    You would still need to investigate the equilibrium settings to make sure that the system has achieved proper equilibrium prior to the dynamic simulation.
     
    However, the main issue here is the contact parameters. I see that you have worked on your integrator settings to minimize the effect of integrator ERROR and HMAX on the results, which is great, but you do need to investigate the contact parameters thoroughly. A very helpful resource would be  WM466 SimAcademy webinar on SimCompanion website, as I had noted earlier.
     
    I did not spend much time on the model but with the following contact parameters:
     
    K=1E6, e=1.8, Cmax=20, dmax=0.01
     
    and the following integrator settings:
     
    INTEGRATOR/HHT,I3,ERR=1.0E-9,HMAX=1E-5
     
    you will be able to achieve very good contact normal force time history:
     
    contact_force
     
    Thank you,
    Maziar
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  • 0
    You would still need to investigate the equilibrium settings to make sure that the system has achieved proper equilibrium prior to the dynamic simulation.
     
    However, the main issue here is the contact parameters. I see that you have worked on your integrator settings to minimize the effect of integrator ERROR and HMAX on the results, which is great, but you do need to investigate the contact parameters thoroughly. A very helpful resource would be  WM466 SimAcademy webinar on SimCompanion website, as I had noted earlier.
     
    I did not spend much time on the model but with the following contact parameters:
     
    K=1E6, e=1.8, Cmax=20, dmax=0.01
     
    and the following integrator settings:
     
    INTEGRATOR/HHT,I3,ERR=1.0E-9,HMAX=1E-5
     
    you will be able to achieve very good contact normal force time history:
     
    contact_force
     
    Thank you,
    Maziar
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