where: [F.sub.t] is radial cutting force on cutter contact point; [F.sub.c] is tangential cutting force on cutter contact point; [K.sub.t], [K.sub.c] are radial and

tangential force coefficients on cutter contact point respectively; [[sigma].sub.t], [[sigma].sub.c] are radial and

tangential force indexes on cutter contact point respectively.

The scientists used a silicon material with microscopic sharp wedges that adheres to surfaces when applying a

tangential force. "If you just make a big area of the adhesive, there will be some level of defect, causing a localised failure that will propagate across the whole surface," said Cutkosky.

[26] utilized the

tangential force and the residual scratch depth as the criteria to assess the scratch performance of PP.

Figure 3 shows the behaviour of the longitudinal

tangential force as a function of the longitudinal creepage in case of absence of other creepages.

The changes of normal force between particles reflect the friction resistance changes, and the changes of

tangential force between particles reflect the sliding ability changes, which can all indirectly reflect characteristics of the particle motion in the screw feeder.

Ericson and Nisell (1988) showed that the

tangential force (perpendicular to the crank) exertion was maximal when the position of the crank was approximately horizontal (90 degree crank angle), and the

tangential force was minimal at two points, known as the top dead center (0 degree crank angle) and bottom dead center (180 degree crank angle) (Chen et al., 1997; 2001; Ericson and Nisell, 1988; Patterson and Moreno, 1990).

Finally, the calculation error for the

tangential force increases with both Reynolds number and journal eccentricity ratio.

At the maximum velocity, the

tangential force rapidly increased and formed peak.

where [W.sub.t] is

tangential force component, [K.sub.0] is the overload factor, [K.sub.v] is the dynamic factor, [K.sub.s] is the size factor, [K.sub.m] is the load distribution factor, and KB is the rim thickness factor.

When

tangential force (for example, spurious slippage) is applied to the contact area, maximum shear stress rises and displaces closer to the tread.

In order this portion of the beam is in equilibrium ([SIGMA]Z=0), in a longitudinal section of the beam there must be the

tangential force dT.