... semi-infinite elastic solid. a, = horizontal stress at any point I = P((1 2n - 2v)[$ - z v2 (E 2n ~3( ,2~ 2)-5 /2) -”~] - 3r2Z(r2 + 22 )-5 /2 az = vertical stress at any point ... was given by Boussinesq [I] as: 22 18 Chapter 1 22 . 23 . 24 . 25 . 26 . 27 . 28 . 29 . 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. Seireg, A., and Weiter, E. J., ... - 3p 23 (, .2~ 2)-5 /2 2n rrz = shear stress at any point - -_ 3p ,z2( ,2 + z2)-5 /2 2n where v = Poisson’s ratio The resultant principal stress passes through the origin and has...