Page 218 - Fundamentals of Computational Geoscience Numerical Methods and Algorithms

8.4 Test and Application Examples of the Particle Simulation Method 209

5.00E+07

NB = 10MPa
4.00E+07 NB = 1MPa
NB = 0.1MPa
Deviatoric Stress (Pa) 3.00E+07

2.00E+07

1.00E+07

0.00E+00
0.00 0.04 0.08 0.12
Axial Strain
(A) 1× m sample
2
5.00E+07
NB = 10MPa
NB = 1MPa
4.00E+07 NB = 0.1MPa
Deviatoric Stress (Pa) 3.00E+07

2.00E+07

1.00E+07

0.00E+00
0.00 0.04 0.08 0.12
Axial Strain
2
(B) 1× km sample
Fig. 8.12 Effects of normal bond strength on the curve of deviatoric stress versus axial strain

two samples exhibit a strong brittle behaviour, while in the case of SB = 1MPa,the
same two samples exhibit a strong ductile behaviour, indicating that the shear bond
strength of particles has a significant effect on the brittle and ductile behaviour of a
particle assembly. This recognition can provide a basic guidance for the selection of
the shear bond strength of the particle material.