It can be seen that the tensorial shear strain components of the infinitesimal strain tensor can then be expressed using the engineering strain definition, γ γ , as [ ε ε x x ε ε x y ε ε x z ε ε y x ε ε y y ε ε y z ε ε z x ε ε z y ε ε z z ] = [ ε ε x x γ γ x y / 2 γ γ x z / 2 γ γ y x / 2 ε ε y y γ γ y z / 2 γ γ z x / 2 γ γ z y / 2 ε ε z z ]