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Eroded volume in explicit dynamic model?

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Old   December 21, 2014, 12:29
Question Eroded volume in explicit dynamic model?
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Kisorthman Vimalakanthan
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Hi,

I very new to explicit dynamic modelling in ansys so this may be a silly question.

Has anyone managed to extract the final volume of a body at the end of a simulation?

I'm interested in knowing how much of the initial volume of a body reaches the failure criteria and eroded off, basically quantify the material removed (red dots) during or at the end of the explicit dynamic simulation.

Any help is greatly appreciated,
Thanks in advance,
Kind regards,
Kishore
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Old   December 30, 2014, 21:48
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Qi
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You need to know the volume of the elements, and which elements eroded.

To extract the volume of the elements. Scope a user defined result to the body of interest. For the expression, use "massall/density" (Without the parentheses). The display time should be set to a time before deformation begins. Set the integration point results to elemental mean. This will display a plot of the starting element volumes. Evaluate it and export the results by right clicking on the result listed under the outline.

To get the eroded elements. Scope another user defined result to the same body. The expression is now "erosion". You can leave display time to last or change it as you see fit to study erosion evolution. Evaluate the result and export those results too.

The exported results are columns with element #, element volume and element erosion (1 or 0). You can simply multiply the element volume by the element erosion and sum up the results, which gives the eroded volume.

You can display and export other user defined results such as "status" to see other types of damage. Just make sure to use the elemental mean.
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Old   January 1, 2015, 08:30
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Kisorthman Vimalakanthan
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Quote:
Originally Posted by qjet View Post
You need to know the volume of the elements, and which elements eroded.

To extract the volume of the elements. Scope a user defined result to the body of interest. For the expression, use "massall/density" (Without the parentheses). The display time should be set to a time before deformation begins. Set the integration point results to elemental mean. This will display a plot of the starting element volumes. Evaluate it and export the results by right clicking on the result listed under the outline.

To get the eroded elements. Scope another user defined result to the same body. The expression is now "erosion". You can leave display time to last or change it as you see fit to study erosion evolution. Evaluate the result and export those results too.

The exported results are columns with element #, element volume and element erosion (1 or 0). You can simply multiply the element volume by the element erosion and sum up the results, which gives the eroded volume.

You can display and export other user defined results such as "status" to see other types of damage. Just make sure to use the elemental mean.
Thank you very much you've solved my problem with such ease.
Happy new year
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Kisorthman Vimalakanthan
Dept. of Power and Propulsion
Cranfield University
Email: k.vimalakanthan@gmail.com
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