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  1. cntrlnr

    Stress concentrators

    Thank you all. My fecitious humor regarding consultant fees was either not recognized as such, or not well received. So much for dispelling the dry engineer stereotype. My apology if I offended any readers. Think of a 60" wide cross beam with two holes on the neutral axis, 12" apart. The...
  2. cntrlnr

    Stress concentrators

    ZCP; Thanks for the response. FEA is an interesting suggestion. We have the capability to model it with Unigraphics in-house but I will most likely not be able to corral the resources. Consultants cost money, don't they? Infinte life is another interesting point. In reality we have fairly...
  3. cntrlnr

    Stress concentrators

    Having an opportunity to design a cross member from which a load will be suspended I find no examples for my configuration in SHIGLEY which provides stress concentration factor charts by Peterson. I have reviewed Peterson directly and found no reference to my configuration either. What I...
  4. cntrlnr

    Machine design material selection

    Thank you to all who responded. I clearly did not provide sufficient supporting information with my request however the scope of the responses has provided me with the sense of direction I was lacking. cntrlnr
  5. cntrlnr

    Machine design material selection

    I am in the process of designing a machine. I wish to drill and tap the frame to receive screws. I plan on using SAE grade 5 fasteners and need to select a suitable steel for the base material. In reviewing the ASTM specs I spotted A284 as a possible good material (steel, weldable, for...

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