Mohr's circle for a general three-dimensional stress state. The three principal stress characterizing the state of stress are identified on the abscissa as σ<sub>1</sub>, σ<sub>2</sub>, and σ<sub>3</sub>.
<a href="//commons.wikimedia.org/wiki/User:Sanpaz" title="User:Sanpaz">Sanpaz</a>
<span class="int-own-work" lang="en">Own work</span>