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  1. mavechin81

    Stress Concentration Factor on Fastener Holes

    Hi, Does anybody know what is the stress concentration factor for the countersunk fastener in matellic and composite? Or how do we define or calculate that? Thanks!
  2. mavechin81

    Fastener edge margin on composite parts

    Typically it is 2.5D to 3.0D, but to be conservative, we are using 3.0D. However, it is recommend to do a test and confirm your data.
  3. mavechin81

    Reading CFAST result in Patran

    ********** ____|o|o|o|____ ________________| |_________________ 2 L-fittings on the top connected horizontally at the vertical flange to Back-to-back angle at the bottom
  4. mavechin81

    Reading CFAST result in Patran

    Thanks for your reply rb1957 . However, I had once consulted the MSC guy and they suggested me to use the Max load among those CFASTs. Just I not sure what is the logic/assumption behind so I would like to know more details about this. BTW, the 3 CFASTs are in-line (out-of-plane), see below...
  5. mavechin81

    Reading CFAST result in Patran

    The 3 CFASTs are represent the fasterner joint through the fittings. Consider only one bolt.
  6. mavechin81

    Reading CFAST result in Patran

    I have fittings connected with 3 CFASTs. If I would like to check the tension load and shear load in the fastener, should I sum all the loads in tension or just take the maximun will do? same goes for the shear? Any idea? Thanks. Mave
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