ABSTRACT
Contact bonds can transmit force but not moment, (Itasca 2008), allowing rotation which can cause some deviation in behavior.
2.2 Parallel Bond
Parallel bonds can be assumed as a cylinder connecting the center of two neighboring spheres together. Parallel bonds work like cementing material acting over a finite area at the contact between two spheres. Parallel bonds, can transfer moment along with force that inhibits rotation, (Itasca 2008).
