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Thread: Sliding with friction

  1. #1
    Join Date
    Nov 2019
    Posts
    4

    Default Sliding with friction

    Hi,

    I am a new user in the forum. I would like to do a simulation of a cartilage block compressed by a rigid plate and then sliding back and forth to see the effect of friction coefficient at the mating surface. I created an input (sliding_with_gap_mooney_rivlin.feb) with a slight modification from the verification input file "co38.feb". I am observing, there is no change in the stress and strain conditions, when the block is sliding over the rigid surface. Could you please help me understand, why the stress and strains are not changing while sliding?

    Thanks.

  2. #2
    Join Date
    Dec 2007
    Posts
    890

    Default

    Hi,

    Try this problem with "sliding-elastic" instead of "sliding-with-gaps" and see if it works better. "sliding-elastic" is our most recent implementation of frictional contact, it may give you better results.

    Best,

    Gerard

  3. #3
    Join Date
    Nov 2019
    Posts
    4

    Default

    Hi,

    Thanks for your help.

    I changed the contact type and now, I am seeing the expected behavior. One more question: I figured out "sliding-elastic" was derived from "sliding-biphasic" contact type. Do you recommend to use "sliding-biphasic" for the biphasic materials sliding on rigid surface? In the user manual, for the biphasic problems, "sliding2" was discussed (Version 2.9, Section 3.13.2), but unfortunately, I could not find any description of "sliding-biphasic".

    Thanks.

    Best,
    Muhammed

  4. #4

    Default

    Hi Muhammed,

    I would recommend using "sliding-biphasic". "sliding-biphasic" is the more recent implementation of biphasic contact and generally gives better results.

    Brandon

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