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  1. AmJam

    Convert rosette strain measurement to pricipal stress

    Thanks, @rb1957. However, since the load is reversible and the beam undergoes tension and compression stresses, shouldn't the principal stress also be cyclic? Why the direction is changing? Please help me to understand the results from the 2D and 3D plots of the maximum and minimum principal...
  2. AmJam

    Convert rosette strain measurement to pricipal stress

    It would be appreciated if anyone could answer my question about measuring stress using Rosette strain gauges. I have measured the strain of a vibrating beam using a rosette strain gauge and now trying to calculate the principal stress from these measurements, but I'm not sure if the result...
  3. AmJam

    Phase of the Frequency Response Function - FRF - Vibration

    Hi I have difficulty to interpret the phase angle from my frf. I would appreciate if anyone can help me with this issue. Attached is my FRF plot. Is it correct? and why is it noisy? If the phase at any peak changes from -180 to 180 (not 90 degrees), is it then related to the natural...

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