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  1. etorrecillas

    Buckling Analysis With Inertia Relief

    Hi people, I am here to inform that today I had good progress with this calculation. I noticed that 2 major points are pretty important: 1-The correct specification of the SUPORT entry; 2-The request only for positive eigenvalues. For negative ones maybe some matrix turns ill-conditioned...
  2. etorrecillas

    Buckling Analysis With Inertia Relief

    Thanks for all contributions... Didn't get any progress up to now, but I will keep you informed. @BlasMolero: thank you, but flutter analysis is not the point here. Of course it will be performed, using ZAERO, but the point now is in fact buckling. Regards.
  3. etorrecillas

    Buckling Analysis With Inertia Relief

    @jhardy: That's true. I tried removing angular velocities and mode shapes are still weird (first 4 ones like rigid body). Looks like the solver can't split rigid bode modes from real buckling modes. @rb1957: We are talking about a complete but simplified aircraft model. It is a composite...
  4. etorrecillas

    Buckling Analysis With Inertia Relief

    Dear fellows, I am writing to ask if anyone has any experience with buckling analysis considering inertia relief effects. I ran some tests with small models to check if buckling modes considering inertia relief effects or SPC approach with fictional body loads should give the same result. It...
  5. etorrecillas

    AL 7050-T7451

    Hi all, I was interested in knowing AL7050-T7451 mechanical properties after being heated to 180°C and cooled again to room temperature. At MMPDS, I found a curve (Fig. 3.7.4.2.1), showed below: At 180°C (356°F), strength is reduced, so I should have care about hot operation, but there is no...
  6. etorrecillas

    Obtaining surface from solid

    Thank you so much for your help. I will have a try and let you know. Regards, Eduardo Torrecillas.
  7. etorrecillas

    Obtaining surface from solid

    Hello guys, Please, I would like to know if is there a way to obtain a surface from a solid. I mean, I have an irregular solid and want to get just its outer face and make it into a surface. I tried the "surface offset", but the resulted surface is dependant on the original solid (if I delete...

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