... from eq. (5 .112 ), then new values for w are calculated fromeq. (5 .113 ), next new values for p are calculated from eq. (5 .114 ), and finally new values for σare calculated from eq. (5 .115 ). This ... inverse form,σrr= λe + 2µ εrr, (6.2)σtt= λe + 2µ εtt, (6.3) 111 A. Verruijt, Soil Dynamics : 6. CYLINDRICAL WAVES 112 where e is the volume strain,e = εrr+ εtt, (6.4)and λ and µ ... velocities, for which the propagation velocity is found to be, with equation (5 .110 ) and the data from Table 5.1, c2= 112 0 m/s, whichis a factor 2 slower than the first wave. This is in good agreement...