Result of FEA does not change, on changing the Material properties with same load
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I have written a code for structural analysis of block with a hole at centre as shown below. The problem arises when i change the material properties (Young's Modulus, Density, Poison Ratio) while keeping the force same, result does not chnge.
STL file has been attached with this question.
model = createpde('structural','static-solid');
force = 200;
YM = 2e11;
PR = 0.3;
Mass_Density = 7850;
Mesh_Size = 0.8;
result = solve(model);
title('Von Mises stress: Static Analysis')
maxx = max(result.VonMisesStress);
minn = min(result.VonMisesStress);
infinity on 16 Jul 2019
Edited: infinity on 16 Jul 2019
I have run your code, results were not constants when parameters had changed.
For example, if you set "PR" (poisson ratio) to be 0.4, the results of von misses stress are different in comparision with PR = 0.3.
Max and min of von misses stress do not change in case of variety of young modulus. But, the displacement is changed.
If you extract the maximum of displacement, you could see this.
It is seen that the displacment (at least in z direction) depend linearly on young modulus. For example,
for YM = 2e5, max(result.Displacement.uz) = 4.7362e-03
for YM = 2e9, max(result.Displacement.uz) = 4.7362e-07
for YM = 2e11, max(result.Displacement.uz) = 4.7362e-09
Maybe the von misses stress is normalized, so that we could not see the change of von misses stress when YM changes.