How to extract data from a stress displacement graph generated by pdeplot3d?

Question

Abdirahman Abdullahi 2019-1-4

1
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https://ww2.mathworks.cn/matlabcentral/answers/438189-how-to-extract-data-from-a-stress-displacement-graph-generated-by-pdeplot3d

回答： Ravi Kumar 2019-1-4

Hi, I have a stress dispaclement graph of a thin plate with a uniform pressure acting on one of its plates, this was generated using the pdeplot3d function. I have attached the code. I was wondering I might be able to extract the stress at certain co-ordinates. I.e (0,0,0) or the centre edges at the top for examples etc. I've tried to use a few solutions I've found online but they don't seem to work on the graph generated by pdeplot3d. Any help would be very much appreiciated.

%=============Fea Analysis of Greatest Stress =============%
%Create the PDE
structuralmodel = createpde('structural','static-solid');
%Create Geometry and Add to the PDE%
gm = multicuboid(1000e-6,1000e-6,20e-6);
structuralmodel.Geometry=gm;
pdegplot(structuralmodel,'FaceLabels','on','FaceAlpha',0.5)
%Add Properties of Silcon and Boundary Condtions to the PDE
structuralProperties(structuralmodel,'YoungsModulus',170E6,'PoissonsRatio',0.22,'MassDensity',2300);
structuralBC(structuralmodel,'Constraint','fixed','Face',3:6);
%Define type of load, generate Mesh and Solve PDE
structuralBoundaryLoad(structuralmodel,'Face',2,'Pressure',110e3);
generateMesh(structuralmodel);
structuralresults = solve(structuralmodel);
figure
pdeplot3D(structuralmodel,'ColorMapData',structuralresults.Stress.syy, ...
                          'Deformation',structuralresults.Displacement)
figure
pdeplot3D(structuralmodel,'ColorMapData',structuralresults.Stress.sxx, ...
                          'Deformation',structuralresults.Displacement)