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comment Error with ND Solve
Is this "simple harmonic motion"? I'm trying to figure out what the differential equations are solving.
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
Let us continue this discussion in chat.
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
Aug
8
comment Why should the spatial derivative order of the ODE *not* exceed two?
@MichaelE2 The question that this question sprouted from (my question) suggests that the utility of mma be displayed by the use of FEM EVEN if it is a rather trivial problem that needs no complicating through the use of Regions. I understand your point though.
Aug
8
revised FEM Solution desired for “Plate with orifice” deflection: Application of Boundary Conditions and use of Regions
added 339 characters in body
Aug
8
comment FEM Solution desired for “Plate with orifice” deflection: Application of Boundary Conditions and use of Regions
No it doesn't: Encountered non-numerical value for a derivative at r == 0.005., but I suppose I'll amend my question: I would like to use a domain as specified by a region difference. the idea is to plot the deflections on the domain to show the utility of FEM to solve such problems. I hope that makes sense. The link you provide is relevant.