To complete the stress depictions on the 2D polar element below and show force equilibrium in the y-direction and moment balance, we need to ensure that the stresses are symmetric with respect to the x-axis and maintain equilibrium.Force equilibrium in the y-direction implies that the sum of the vertical stresses must be zero. Moment balance requires that the sum of moments about any point must also be zero.
A) The sum of stresses on the top and bottom of the element is zero, and the sum of moments about the origin is zero.
B) The sum of stresses on the left and right sides of the element is zero, and the sum of moments about the x-axis is zero.
C) The sum of stresses on the left and right sides of the element is zero, and the sum of moments about the origin is zero.
D) The sum of stresses on the top and bottom of the element is zero, and the sum of moments about the y-axis is zero.