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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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    Hi Erik,
     
    This was a good summary of takeaways from this thread, which I am sure will be helpful to other readers as well. I need to address a couple of points through:
     
    The simplicity of the model is not defined by the geometries or the number of DOFs necessarily. In some cases, a model with simple geometries and a limited number of DOFs can be deemed complex if it involves a nonlinear object such as contact and a flexible body used in contact, which makes the mesh refinement an extra deciding factor apart from the modal content of it. Moreover, if the accelerations terms are used to define the accuracy of the model, then such criteria for model validation can make the whole model verification and validation COMPLEX.
     
    The Hertzian contact approximation can be used as a ballpark to start an iterative process to find the actual contact parameters in a dynamic system.
     
    Thank you,
    Maziar
     
     
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  • 0
    Hi Erik,
     
    This was a good summary of takeaways from this thread, which I am sure will be helpful to other readers as well. I need to address a couple of points through:
     
    The simplicity of the model is not defined by the geometries or the number of DOFs necessarily. In some cases, a model with simple geometries and a limited number of DOFs can be deemed complex if it involves a nonlinear object such as contact and a flexible body used in contact, which makes the mesh refinement an extra deciding factor apart from the modal content of it. Moreover, if the accelerations terms are used to define the accuracy of the model, then such criteria for model validation can make the whole model verification and validation COMPLEX.
     
    The Hertzian contact approximation can be used as a ballpark to start an iterative process to find the actual contact parameters in a dynamic system.
     
    Thank you,
    Maziar
     
     
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