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Are there other FE elements types beside the Usual?
2

Are there other FE elements types beside the Usual?

Are there other FE elements types beside the Usual?

(OP)
Besides tri, quad, tet & hex are there any other element that have been used in FE?

Not bothered if they have been successful or not (probably not as I would have come across them by now I guess)

RE: Are there other FE elements types beside the Usual?

Beams, springs, truss/rod, connectors, rigid body elements, etc. are all commonly used as well.

Brian
www.espcomposites.com

RE: Are there other FE elements types beside the Usual?

(OP)
Ever come across any others?

RE: Are there other FE elements types beside the Usual?

Wedge and pyramid elements in 3D.

What about elements like axisymmetric, plane stress, plane strain, infinite, gasket, cohesive, frame, etc.?

RE: Are there other FE elements types beside the Usual?

All sorts of specialized elements such as crack tip elements, those for VCCT, etc.

One way to organize it would be to use a flowchart and start at the highest level, 0-D, 1-D, 2D, 3D elements. Then break those down (i.e. a 2-D element can be a tri or a quad...with varying number of possible nodes per element). Then break those down (i.e. a quad can be plane stress, plane strain, axisymmetric). Similarly a 1-D element can be a beam, truss, spring, etc.

If you look at an ABAQUS, NASTRAN, ANSYS, etc. manual, it will discuss the possible elements for a given solver.

Brian
www.espcomposites.com

RE: Are there other FE elements types beside the Usual?

what is the sense of your question ??

RE: Are there other FE elements types beside the Usual?

Here is another input:

https://welsim.com

RE: Are there other FE elements types beside the Usual?

DrBwts

Your examples are 2-d and 3-d elements.

Then you have 1-d elements, typcally connection 2 nodes. They can be beams, rods and so on.

And you have 0-d elements, a single node. Like a concentrated massa or certain springs. I don't know if "0-d" is a commen term but I have seen it in some texts.

Then there are special elements och special element formulations. Some already mentioned in the thread but there is more. It also depends on that software we are talking about.

Thomas

RE: Are there other FE elements types beside the Usual?

@ThomasH:

0D, 1D, 2D & 3D elements are all very well - but what about 4D elements? Just think - you could run a linear transient analysis in a single time-step!

http://julianh72.blogspot.com

RE: Are there other FE elements types beside the Usual?

@jhardy1

That would be nice.

But so far I have not seen any 4d elements. Perhaps some multi-physics could be considers 4d or more but I have not seen that terminologi in that context.

Thomas

RE: Are there other FE elements types beside the Usual?

@jhardy1
> 0D, 1D, 2D & 3D elements are all very well - but what about 4D elements? Just think - you could run a linear transient analysis in a single time-step!

I don't understand. You can run a linear transient analysis generally with one solution point - independent of the element type. So what do you mean with 4D?

RE: Are there other FE elements types beside the Usual?

@Mustaine3:

It was a joke - a 4D element formulation would presumably include time as the 4th dimension, so in addition to getting the three-dimensional stresses, you would get the full time-history in a single iteration of a linear solver (no time-stepping required). I believe Doctor Who used 4-D FEA to design the Tardis - it is (will be) a standard feature in AutoDesk Nastran In-CAD 2376.

http://julianh72.blogspot.com

RE: Are there other FE elements types beside the Usual?

@jhardy1

I hope it was clear that I got that is was a joke bigsmile.

Bit a bit more serious, the way we use terminology today I can't see the term 4d elements as relevant. I have heard the term 3d beams, but it was used for a 1d beam in a 3d model.

0d to 3d, but beyond that I can't see any relevance. Perhaps there are some specific formulation that can be interpreded as 4d. But I have not seen any yet.

Thomas

RE: Are there other FE elements types beside the Usual?

Ahh, ok. I've never seen Dr. Who. It's not a big thing in my country. I just know briefly what it is and the things that were mentioned in The Big Bang Theory wink

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