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  1. VonMises

    Allowable BGA vibration

    I got it ! Thank you very much. I will let you know if anything new comes along. VM
  2. VonMises

    Allowable BGA vibration

    It sounds very good ! Thank you. Here is the fax number: In Canada, Montreal: 514-425-3016 Thanks again. VM
  3. VonMises

    Allowable BGA vibration

    I have a problem and I do not know how to tackle it. One lead of a large component broke in vibration when it should have not. Now, the formula I used is the one in the Steinberg book for random vibration, that predicts the maximum 3xSigma allowable displacement for 20 million cycles under...
  4. VonMises

    Allowable BGA vibration

    Hello, I am also debating these Steinberg formulas. One main concern is that these formulas are good only for one certain type of boundary conditions, i.e. clamped edges. What happens for a bolt restrained PCB with the same type of components on it? Since we want to control the deflections...

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