Question: I II. If E1, E2, v12, and the modulus at 45, Ex (0-45) are known. Develop an expression to determine G12. III. Consider a

I II. If E1, E2, v12, and the modulus at 45, Ex (0-45) are known. Develop an expression to determine G12. III. Consider a single +60 unidirectional graphite/epoxy lamina under biaxial loading as shown in the figure, y= -40x = 200 MPa. Determine the value of G12 for the lamina if strain gages read the following strain values: &y=0.00879, &x= -0.00689, Xxx -0.00891 +60 y= 200 MPa = -50 MPa

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