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  1. 31-08-2021 #12
    John McNamara's Avatar
    Lives in Melbourne, Australia.
    John McNamara
    Last Activity: 27-10-2023 Has been a member for 9-10 years. Has a total post count of 137. Received thanks 28 times, giving thanks to others 3 times. Referred 1 members to the community.
    Re Damping.

    This (Excellent) paper may interest you of you are thinking of building a machine and filling steel tubes with damping material. There are practical examples towards the end. Of note is the thin flexible layer between the concrete and the way it is sectioned within the tube in plastic bags in one case, it is not just poured in.

    The machine designed in the paper, a tool and cutter grinder was actually commercially built by Star.

    https://my.mech.utah.edu/~bamberg/re...mberg-PhD.html

    Youtube "edge precision" to see one working.
    https://www.youtube.com/watch?v=N2vPng7O5bQ

    You can download the paper from MIT
    https://dspace.mit.edu/handle/1721.1/88839

    Regards
    John
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