Plot average stress across component

Hello,

 

I have a component as seen below. I'm struggling to find out how to, if possible, plot of graph of Shear Stress vs Displacement.

 

By using a node path you only get stress at that node however I need something more complex.

 

I need to average the total stress for elements in the x and z axis at certain y displacements. Then plot, y displacement vs Shear stress average plane.

 

Still confused? See diagram 2 below for example.

I need to average all the elements in their specific colour, then plot the y displacement (1->6) vs shear stress (average colour).

 

Hope your able to help.

 

I'm using Optistruct as my solver

 

 

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