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  • Users: phili22
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  1. phili22

    COSMOS - Negative Natural Frequencies

    I have been conducting a modal analaysis of a long tube hanging vertically. The tube is constrained at one end and free at the other. For lengths less than 2m, the natural frequencies obtained from COSMOS seem reasonable. However, at lengths greater than 2m, I am getting a negative natural...
  2. phili22

    Stress concentration Factors

    I am trying to figure out the actual stress for a pipe that is fillet welded to a plate. The pipe is cantileved off of the plate and loaded at the end. So, the largest stress is located at the weld. Can anybody direct me to some literature that explains how to handle this? I assume there are...
  3. phili22

    316 SS RoHS Compliance

    I have a general question about a 316 stainless steel part we will be fabricating that we require to be RoHS compliant for our customer's application. The RoHS directive restricts the use of certain hazardous substances to the following levels for stainless steel: Lead – Pb 0.35% Mercury – Hg...

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