Exact face mesh refinement / Number of subdevisions a the face / Reproducible mesh

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Jan Horstmann 2022-6-7

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回答： Sachin Lodhi 2024-3-21

Hello,

how exactly can I design the mesh with the PDE Toolbox so that I have a even mesh on a given area. By this I mean a mesh that consists of elements of exactly the same size. From normal FEM programs (such as ANSYS Workbench) I know that you can specify that with the number of subdivisions. For me, it would also be ok if I manually enter each mesh node on the mesh. I just need to be able to generate an accurate mesh that does not change on one face when I change the mesh of the rest of the component.

I have attached the two plots and the needed geometry (only as a .txt because this forum does not supports .stl data) I hope this isn't a big problem)

Thanks in Adavance

smodel = createpde('structural','static-solid');
geometrydata=importGeometry(smodel, 'Geomvolume.stl');
scale(geometrydata,25.4)
pdegplot(smodel,'FaceLabels', 'on','Edgelabels','on','VertexLabels','on','FaceAlpha', 0.5);
msh = generateMesh(smodel,'GeometricOrder','linear', 'Hmax', 10, 'Hmin', 5, 'Hface',{6,1})
pdeplot3D(msh); 

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Answer 1

Sachin Lodhi 2024-3-21

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Hi Jan,

Creating a mesh with uniformly shaped and evenly sized elements as you require is a difficult task using mesh generator. You can use the following code sinppet to generate mesh, though please be aware it is a linear mesh.

% Initialize the PDE model for a structural analysis
model = createpde('structural','static-solid');
% Import geometry from an STL file
geometrydata = importGeometry(model, 'Geomvolume.stl');
% Visualize the imported geometry
figure;
pdegplot(model, 'FaceLabels', 'on', 'EdgeLabels', 'on', 'VertexLabels', 'on', 'FaceAlpha', 0.5);
title('Imported Geometry from STL');
% Generate mesh for the imported geometry
msh = generateMesh(model, 'GeometricOrder', 'linear', 'Hmax', 10, 'Hmin', 5);
% Visualize the generated mesh (3D plot)
figure;
pdeplot3D(model);
title('Generated Mesh on Imported Geometry');