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  1. mae1778

    X-ray Slot Weld on Assembled Pressure Vessle?

    I could be wrong, but if we had a crack that didn’t actually make it to the surface, a penetrant inspection wouldn’t show anything would it? I have evidence on another part that suggests the crack would start on the IML and progrates outward, but does not go all the way. Assume we don’t have...
  2. mae1778

    X-ray Slot Weld on Assembled Pressure Vessle?

    I have a pressure vessel made from 6061-T6 about the size of a small air compressor that’s undergone proof testing. I’d like to do nondestructive testing on it to verify no cracking occurred during the test. Particularly curious about some slot/plug welds that we have on internal bulkhead...
  3. mae1778

    Nastran: how to obtain 1-sigma stresses for SOL 111

    I've never done this myself, as I use the MSC.Random tool, but according to nas102_wk10.pdf (not sure about the copy-write rules, otherwise I would post it for you) on the MSC support page, you would add: Random = n (same number as the RLOAD2 table ID) to your subcase control and reference the...
  4. mae1778

    Nastran: how to obtain 1-sigma stresses for SOL 111

    If you have Patran, you can just use the MSC.Random tool. Run sol 111 with 1G and post process the PSD with MSC.Random.

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