# Strain Components

1. Feb 17, 2009

### worldtop

I am trying to plot the components of the strain EXX,EYY and EXY in a 2D framework in MATLAB.
The tensor matrix i have is B[exx,exy;exy,eyy]with each component 32x32 array.
The values of Eyy is zero does that mean that there is no strain in the y direction between the two entitie sthat I am comparing and also what is the best way to plot that .

2. Feb 17, 2009

### Phrak

Each component is a scalar, so what are you doing?

3. Feb 17, 2009

### yzou_ua

Exactly, strain is a pointwise scalar, the best way to plot them along a particular direction and then plot them one by one, separately, as follows:

plot(x,exx)
hold on
plot(x,eyy)
plot(x,exy)
...

4. Mar 13, 2009

### worldtop

I am new to strain components. just a few fundamental question what are the possibilities that the shear starin exy should be zero even when exx and eyy should have some values.logiccaly applying the strain in a continumm where will a deformation lead to shear component being zero?

5. Mar 13, 2009

### yzou_ua

1stly, if your crystal is zinc-blende:
the inversion symmetry will give rise to the zero shear strain while shear strain can never vanish when lack of inversion symmetry. In general, the shear strain in zinc-blende is small...

2ndly, if your crystal is wurtzite:
the shear strain can never be ignored which means they always exist...