Next, consider the equilibrium of the stress element for shear stresses. Let the dimension of the square stress element be denoted by Δx and Δy, and let the thickness of the stress element in the z direction be Δz.
Next, consider the equilibrium of the stress element for shear stresses. Let the dimension of the square stress element be denoted by Δx and Δy, and let the thickness of the stress element in the z direction be Δz.