Determine G12 shear modulus from tensile test data

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waifong
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Hi, i just did a unaxial tensile test for a done specimen.
What i got is the stress-strain curve, and poison ratio.
May i know how can i determine the shear modulus G12 ?
I gt E1, E2 and V12 and V21.
 

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I don't think anybody knows what you mean by E1, E2, V12, and V21. These are not universal terminology. You had better read you own textbook more carefully in order to be able to communicate more fully what you have measured and what it is that you need to find. You may also learn how to find it along the way.