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Questions tagged [acegen]

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AceGen is a Mathematica package for automatic code generation, focused on finite element method subroutines.

122 questions
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1 vote
0 answers
44 views

I would need some help when introducing line-search inside Newton-Raphson method inside AceGEN. I'm working with a custom plasticity model implemented in AceGEN/AceFEM using standard Tangent and ...
Luka Roblek's user avatar
  • 43
1 vote
0 answers
158 views

I have a column beam (x = 10, y = 1, z = 1) and would like to prescribe pure bending conditions around Y axis. How can I achieve that in AceGEN/AceFEM? Edit: by pure bending I mean applying equal and ...
Luka Roblek's user avatar
  • 43
2 votes
1 answer
171 views

I want to make simulation for 1 hexahedral finite element of dimensions 1mm x 1mm x 1mm. I need to use SI units (metres) as below in the code ...
Binka's user avatar
  • 95
1 vote
1 answer
111 views

Some time ago I posted a question concerning additional graphics for SMTShowMesh[] SMTShowMesh with additional graphics Now I want to include additional graphics in SMTRestart[] session for ...
Binka's user avatar
  • 95
5 votes
1 answer
362 views

The packages MeshTools (@Pinti) and FEMAddons seem to feature similar functions. I sometimes had strange (i.e. inconsistent results when meshing would work/not work without changing anything). Which ...
jmt's user avatar
  • 111
2 votes
1 answer
161 views

I want to make simulation of shearing of one cubic finite element as in the code below. How can I constrain all horizontal displacements (in X direction) of nodes "X"==L to have the same ...
Binka's user avatar
  • 95
2 votes
1 answer
141 views

I have an issue which I know is definitely solvable but I don't know how to implement this in AceGen. Basically, I want to assemble a matrix $\mathbf{L} \in \mathbb{R}^{n_{dof} \times 6}$ for a global ...
Frida's user avatar
  • 45
1 vote
0 answers
112 views

I try to evaluate the following code, but I get "Error during numerical evaluation of expression with random numbers." Expression contains parts that canot be evaluated. Messages: ...
rcontinuum's user avatar
  • 11
0 votes
2 answers
201 views

I conducted a linear FE analysis of a 3D cantilever beam using AceGen/Acefem and Ansys. I find that results are a little bit off from the ansys results. For e.g., the deflection reported at the ...
VarunM's user avatar
  • 101
0 votes
1 answer
131 views

I am trying to solve a system of equations with the command SMTNewtonIteration[]. This method needs initial guesses for the degrees of freedom I am looking for. Is ...
user1234321's user avatar
  • 95
0 votes
1 answer
135 views

I am struggling with an issue and need advice. In general: My objective is to implement a Quasi-Newton (QN) method using a small strain elasto-plastic element from the main library and a user defined ...
Frida's user avatar
  • 45
0 votes
1 answer
117 views

I am using the command SMTNewtonIteration[] to solve a boundary value problem in AceFEM and get the following error message: What does this message mean exactly? Am ...
user1234321's user avatar
  • 95
0 votes
1 answer
107 views

I have a problem concerning the order of the evaluation of the AceFEM parameters. My AceGen Element contains, among many others, an expression of the form B (aa - bb/(cc Exp[dd w^2] + ff)) with B, aa, ...
Julia Sunten's user avatar
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1 vote
1 answer
137 views

I use Acegen for Finitie Element formulation that gives out residuals and tangents by taking in the field values as inputs. For this in my residual formulation I need to integrate a nonlinear term ...
AceRox's user avatar
  • 13
2 votes
1 answer
169 views

I am trying to implement a 2D turbulence problem with the model of Spalart-Allmaras. Therefore, I need to extract the global gauss coordinates to define parameter 'd' which stands for the distance to ...
user1234321's user avatar
  • 95

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