midden value and stress

[YA_10963798]

I'm trying to find the effective stress, I wrote a program in mathcad however the result was zero always 

I think the error occurs because of the depth . Since I need to use the previous depth of each stress and not the depth in the same point. 

Can anyone please help me?

Also I need to find the midden value but not sure how to find that 

in excel 

 

in mathcad 

[VladimirN]

Please upload your Mathcad Prime worksheet here.

[AlanStevens]

You probably want:

rather than

(I can't test it as I only have an Express version).

[YA_10963798]

thank u

[Werner_E · Accepted solution]

A for-loop needs at least a start and a stop value (like a range).

Are you looking for this

or should it rather be this

And then

No need for defining any range variables like i.n or j.n

Prime10 sheet attached

[YA_10963798]

Thank you

[YA_10963798]

thanks