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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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  • 0
    Hi Erik,
     
    With any computational tool, you would need to perform a convergence study (integrator sensitivity analysis) to make sure that the results are not dependent on the integrator settings (e.g., ERROR and HMAX). In such attempt, you need to tighten ERROR and HMAX and find a contact force that is not dependent on these parameters. Only then, will the results be reliable.
     
    Now, since this is a contact model, you would need refrain from using GSTIFF/I3 integrator. GSTIFF/SI2 and HHT/I3 are to be your choices. With both you would need to perform a convergence study. The HHT integrator is, however, more sensitive to HMAX values.
     
    Thank you,
    Maziar Rostamian
    MSC Software
     
    Thank you,
    Maziar
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  • 0
    Hi Erik,
     
    With any computational tool, you would need to perform a convergence study (integrator sensitivity analysis) to make sure that the results are not dependent on the integrator settings (e.g., ERROR and HMAX). In such attempt, you need to tighten ERROR and HMAX and find a contact force that is not dependent on these parameters. Only then, will the results be reliable.
     
    Now, since this is a contact model, you would need refrain from using GSTIFF/I3 integrator. GSTIFF/SI2 and HHT/I3 are to be your choices. With both you would need to perform a convergence study. The HHT integrator is, however, more sensitive to HMAX values.
     
    Thank you,
    Maziar Rostamian
    MSC Software
     
    Thank you,
    Maziar
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