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Tensile stress

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A bar of steel 1 by 1½ in cross section and 6 in long is subjected to a pull of 6000 lb. What is the average tensile stress in the bar?

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Since the direction of the force is unspecified, I will assume that the pull is axial ...

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The answer is given succinctly with simple equations.

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Elasticity: Tensile stress - normal, tangential; shear stress

See attached diagram.

A bar with cross sectional area A is subjected to equal and opposite tensile forces F at its ends. Consider a plan through the bar making an angle ? with a plane at right angles to the bar.

a.) What is the tensile (normal) stress at this plane in terms of F, A, and ? ?

b.) What is the shear (tangential) stress at the plane in terms of F, A, and ? ?

c.) For what value of ? is the shear stress a maximum?

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