An elastic foundation is subjected to uniform compressive stress z and shear stress of 0.3 z as shown below. If the vertical strain in the foundation is limited to 0.002, what is the maximum of compressive stress z that can be applied. At the maximum compressive stress z , determine the shear strain in the foundation. Assume the elastic modulus and Poisson's ratio of the foundation to be 16GPa and 0.2, respectively. 1 1 ij E ij kk ij ; ij 1 ij 1 2 kk ij E