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Recent content by sonnenschein987

  1. sonnenschein987

    shock absorption and phase angle

    Hi PNachtwey, thanks for the answer. The part is about 1in thick. The cycling was at 20 Hz and we sampled at 100Hz. I would be able to detect any shift if it was there. And I was not quite correct as I said that there was 0 shift. Actually there was 2-5 deg of shift, but I was reading up on this...
  2. sonnenschein987

    shock absorption and phase angle

    This is not a school project and you are not helping me with my homework. It is part of a larger experiement. I want to exchange part 1 with part 2 because I hope to get better performance (force absorption). Therefore, I did the side test to see if I am right. The results are not quite what I...
  3. sonnenschein987

    shock absorption and phase angle

    Sure. It is 1 dof system. One block of poly material between 2 metal plates. The piston of the mts applies a cyclic load and measures with external load ell the voltage (previosly calibrated to extract force). Results of this test are as expected. Nearly same load as applied is measured by the...
  4. sonnenschein987

    shock absorption and phase angle

    Greg, what would you assume that had happened to the load. Give me us your wisdom or do not leave a comment! thanks!
  5. sonnenschein987

    shock absorption and phase angle

    Hi, I did a test with a material under 20Hz cyclic loading MTS. To evaluate the force absorption, two load cells were used to simultaneously measure the applied (input) load and transmitted (output) resultant force. For a stiff material, the force applied was the force transmitted to 100% with...

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