Figure 8.
The upper left graph plots phi divided by phi peak against gamma octahedral, p l. Orange data points increase from about 0.70 to 1.00 as gamma octahedral, p l increases to about 0.04. A dashed line then decreases from 1.00 to about 0.70 at gamma octahedral, p l near 0.20. The graph includes phi c v of 29.6 degrees. The lower left graph plots psi divided by psi peak against gamma octahedral, p l. Orange data points increase from 0 to 1.00 as gamma octahedral, p l increases to about 0.04. A dashed line then decreases from 1.00 to near 0 at gamma octahedral, p l near 0.20. The graph includes psi of 1 degree. The upper middle graph presents q in kilopascals against epsilon s from 0 to 0.20 for p prime values of 50, 100, 200, and 400 kilopascals. All curves rise rapidly to peak values near epsilon s of 0.03 to 0.05 and then decrease gradually. The 400 kilopascal curve peaks near 1450 kilopascals and decreases to about 850 kilopascals. The 200 kilopascal curve peaks near 750 kilopascals and decreases to about 420 kilopascals. The 100 kilopascal curve peaks near 380 kilopascals and decreases to about 220 kilopascals. The 50 kilopascal curve peaks near 200 kilopascals and decreases to about 120 kilopascals. The lower middle graph presents epsilon v against epsilon s. All curves begin near 0, increase slightly above 0, then decrease continuously to values between about negative 0.08 and negative 0.09 at epsilon s of 0.20. The upper right graph presents D I C test results for q against epsilon s. The four curves follow trends similar to the analysis results, with peak values near 1400, 740, 380, and 200 kilopascals and gradual decreases thereafter. The lower right graph presents D I C test results for epsilon v against epsilon s. All curves begin near 0 and decrease steadily to values between about negative 0.08 and negative 0.09 at epsilon s of 0.20.Comparison of the calibrated MC-HS model to triaxial compression tests conducted at ETHZ: (a) dependency of mobilised friction and dilation angle on the magnitude of plastic strain.; deviatoric and volumetric response of Perth sand derived (b) experimentally and (c) numerically after model calibration