Compressive Circumferential Stress or hoop stress is a normal stress in the tangential (azimuth) direction. axial stress, a normal stress parallel to the axis of cylindrical symmetry. And is denoted by Fcircumference. Compressive Circumferential Stress is usually measured using the Megapascal for Pressure. Note that the value of Compressive Circumferential Stress is always positive. Typically, the value of Compressive Circumferential Stress is greater than 0.