When considering the stress and strain when the material is$$subjected$$to$$pure $$shear$,$ answer the following lower$-$order solution. At$$this $$time$,$ the shear stress is$$given$$as$$the $$tau $,$the $$elastic modulus of$$the $$material is$$given$$as$$E$,$the $$previous step is$$given$$as$$G$,$and $$the Poisson's ratio is$$given$$as$$the$$v$.($b$)$The shear strain and the maximum vertical strain under the geometric conditions shown in the figure below Derive the relationship between the rate max$.$