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 Sep 5 comment Mathematica not responding to clean start-up I don't know what happened recently with mathematica and wolfram but I think my work has just been jeopardized by whatever it is (my fault or Wolfram's fault) Sep 5 comment Mathematica not responding to clean start-up @ilian When I try to launch the frontend, it the spikey just stays at "initializing internal preferences". Sep 5 comment Mathematica not responding to clean start-up @ilian Led me through a bunch of activation steps and then "The password you entered is not valid." Not fun at all. Sep 5 asked Mathematica not responding to clean start-up Aug 17 comment Boundary value problem: complicated functionals @SayaniMajumdar As late as this may be, out of curiosity, this looks like the Euler-Lagrange equation. May I ask what you are trying to minimize via this Euler-Lagrange equation? What physics are you trying to capture? A Lennard-Jones 6-12 potential? Aug 16 comment Equal flow boundary conditions Can you give us an idea as to what these two equations are trying to solve? Are they meant to be coupled somehow? The significance of the equation itself may allow for clues to help you. Aug 13 revised Creating a data1 versus data2 plot? further tags added Aug 13 suggested approved edit on Creating a data1 versus data2 plot? Aug 12 comment FEM Solution desired for “Plate with orifice” deflection: Application of Boundary Conditions and use of Regions If I were to modify this problem to have a point load, would I (just have to) use DirichletCondition for the load p0/De at x=L && Y=h`? Aug 12 comment FEM Solution desired for “Plate with orifice” deflection: Application of Boundary Conditions and use of Regions Aug 12 comment FEM Solution desired for “Plate with orifice” deflection: Application of Boundary Conditions and use of Regions I would gladly share with you (and other mathematica developers) what I am using Mathematica+FEM for if you wish. I am a faculty in a technological university and one of my wishes is to have people use Mathematica for more than just as "scrap paper" Aug 12 comment FEM Solution desired for “Plate with orifice” deflection: Application of Boundary Conditions and use of Regions Thank you for confirming my deduction of XY plane. Aug 12 accepted FEM Solution desired for “Plate with orifice” deflection: Application of Boundary Conditions and use of Regions Aug 12 comment FEM Solution desired for “Plate with orifice” deflection: Application of Boundary Conditions and use of Regions I doubt that a 3D model would provide a different solution given the axisymmetric nature of the plate and the load applied. But this is definitely food for thought. It is interesting (and perhaps) to note that this FEM model in Mathematica surpasses in computation speed what is obtained through Hyperworks. Hyperworks doesn't allow the application of boundary conditions as derivatives and one is required to choose loose terms such as "free boundary" or "fixed boundary". My hope is to get mathematica significant recognition in my university's mechanical engineering dept. Aug 12 comment FEM Solution desired for “Plate with orifice” deflection: Application of Boundary Conditions and use of Regions This is interesting. However, the XZ plane in your method is the plane of the screen (deducing from deflection direction)? Aug 12 awarded Nice Question Aug 10 comment FEM Solution desired for “Plate with orifice” deflection: Application of Boundary Conditions and use of Regions @user21 Yes, for this problem, the deflection boundary conditions are 4th and 3rd order. I am not entirely sure how I could use the plane stress/strain operator problem to do this. I'll look into it. Aug 10 comment FEM Solution desired for “Plate with orifice” deflection: Application of Boundary Conditions and use of Regions @user21 I am thinking this is a plane strain problem. And even then the boundary conditions may need to be beyond second order. Maybe in wrong about the latter and I will check. Aug 8 comment FEM Solution desired for “Plate with orifice” deflection: Application of Boundary Conditions and use of Regions Yes, you are correct. Initializing my parameters allowed it to run correctly. However, I am still curious as to how I could use Regions and FEM to solve such a problem. Aug 8 revised FEM Solution desired for “Plate with orifice” deflection: Application of Boundary Conditions and use of Regions change of title to reflect intent