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strain matrices of particles?

Asked by Shenyang Cai

Hi,

When I look into the strain vtk files I find that the number of matrices in the "strain_matrix" section always equals to the number of points. It seems that every strain matrix corresponds to a certain particle.

Why let strain matrices correspond to particles rather than tetrahedrons? Is the strain tensor of a tetrahedron a result from some calculations of all its vertices' strain matrices?

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Bruno Chareyre
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Best Bruno Chareyre (bruno-chareyre) said : 		#1

Hello,
I suggest to read the documentation of TesselationWrapper, especially this part:
"The calculation of microstrain is explained in [Catalano2014a]_ "

>Is the strain tensor of a tetrahedron a result from some calculations of all its vertices' strain matrices?

Actually it is the exact opposite: the strain tensor of a vertex is a result from some calculations of all its incident tetrahedras' strain matrices. You will find more details Catalano2014a.

Bruno

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Shenyang Cai (sycai) said : 		#2

Thanks Bruno Chareyre, that solved my question.