3.2. linearODF file

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Purpose

The *.linearODF files are used to provide ODF intensity data from macro texture measurements. The files are read in by DAMASK as defined in the texture section of the material.config file. The data is then used to sample single orientations using the hybridIA scheme [1].

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Syntax

The file contains a list of ODF intensities. This list is sorted by Euler angles with $\varphi_2$ running first, then $\Phi$ and finally $\varphi_1$. I.e. the first intensity value is for the Euler angles (0, 0, 0), the second for (0, 0, $\Delta \varphi_2$), the third for (0, 0, $2\Delta \varphi_2$) and so on until (0, 0, $max\ \varphi_2$), then follow (0, $\Delta \Phi$, 0), (0, $\Delta \Phi$, $\Delta \varphi_2$) and so on all the way to ($max\ \varphi_1$, $max\ \Phi$, and $max\ \varphi_2$). In total $max\ \varphi_1 / \Delta \varphi_1 * max\ \Phi / \Delta \Phi * max\ \varphi_2 / \Delta \varphi_2$ intensiteis must be specified. The intensities do not need to be normalized, this is automatically handled by DAMASK. The header of the table columns needs to be

 1_euler 2_euler 3_euler intensity

.

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Example

The sample files provided with DAMASK is given here in short form

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1 header
1_euler     2_euler    3_euler    intensity
2.5		2.5		2.5		0.560461
2.5		2.5		7.5		0.603906
2.5		2.5		12.5		0.756228
2.5		2.5		17.5		0.979027
2.5		2.5		22.5		1.15566
...
...
...
357.5		177.5		332.5		1.1835
357.5		177.5		337.5		0.922203
357.5		177.5		342.5		0.711097
357.5		177.5		347.5		0.601503
357.5		177.5		352.5		0.58171
357.5		177.5		357.5		0.620167

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References

[1]	P. Eisenlohr, F. Roters: Selecting sets of discrete orientations for accurate texture reconstruction, Computational Materials Science 42 (2008) 670 - 678