PTMC

[wanghaijian217]

Hi frank
How to define parent orientation in Bunge Eluer? what does this mean?

[frankNiessen]

Hi wanghaijian217,

this is an optional feature for you to analyze how the shape strain would translate into specimen coordinates for a grain with a given grain orientation. If you keep the standard value of 0,0,0 it will assume that the shape strain along the [1,0,0], [0,1,0] and [0,0,1] acts along the X,Y and Z coordinates of your specimen. When you give a different grain orientation, the shape strain will be rotated alongside with the crystal coordinate system and the plots will show how the shape strain is resolved in the specimen coordinate system as a result of that.

Regarding Bunge Euler notation, this is one way of defining a grain orientation, and you need to be careful that the MTEX Euler notation is defined as the inverse of the Bunge Euler notation - make sure to use Bunge notation if you want to use this feature.

I hope this helps,

Best wishes
Frank