A material is subject to normal stresses (σx and σy) on two perpendicular planes along with shear stress τxy. If one of the principal stresses is zero, which of the following holds TRUE?
1
\({\tau _{xy}} = \sqrt {\left( {{\sigma _x} + {\sigma _y}} \right)} \)
2
\({\tau _{xy}} = {\left( {{\sigma _x} \times {\sigma _y}} \right)^{2}}\)
3
\({\tau _{xy}} = \left( {{\sigma _x} \times {\sigma _y}} \right)\)
4
\({\tau _{xy}} = \sqrt {\left( {{\sigma _x} \times {\sigma _y}} \right)} \)