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A hollow rectangular aluminum bar (E = 71 GPa, Poisson ratio = 0.32 and thickne...

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A hollow rectangular aluminum bar (E = 71 GPa, Poisson ratio = 0.32 and thickness 2.5mm)  is loaded by a force P and moment M at the free end as shown in the figure. Two strain gages at 60o to the longitudinal axis recorded the following strains

εa=-120μ and εb=1000μ

Determine the applied force P and applied moment M.

Use at least three decimal points for the stresses and loads and six decimal points for the strains.

The moment of inertia (in 10-6 m4 )

The shear strain γxy in point "a" (in microns)

The magnitude of force P ( in kN)

The normal strain εxx in point "b" (in microns)

The normal stress σxx in point "b" (in MPa)

The moment M (in N-m)

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