Twisting forces

In the case of a polyatomic molecule, rotation can occur in three dimensions about the molecular center of mass. Any possible mode of rotation can be expressed as projections on the three mutually perpendicular axes, x, y, and z hence, three moments of inertia are necessar y to give the resistance to angular acceleration by any torque (twisting force) in a , y, and z space. In the MM3 output file, they are denoted IX, lY, and IZ and are given in the nonstandard units of grams square centimeters. 

Here, kb=Q/d2 is the force constant of longitudinal deformations of filler-filler bonds and ks is the bending-twisting force constant of the cluster, which is given by Eq. (28). From Eq. (31) one finds that the yield strain of a... 

Again, the significance of this type of stress-strain relationship is that all six of the strain eomponents (si ss) may be nonzero with the application of a single component of stress. For example, a sample might shear as well as elongate under a uniaxial tension. Similarly, a sample may bend as well as twist if pure twisting forces are applied to its ends. 

When immersed in a magnetic field, a nueleus will experience a twisting force, or torque, which tends to line the spin axis of the nucleus up with the field, the same effect that causes two bar magnets to stick to each other in opposed directions. Because the nucleus is spinnirig, however, it will precess like a spinning top or gyroscope. 

Torque (Motor) - The turning or twisting force generated by an electrical motor in order for it to operate. 

Fig. 3.21. Forces (a) and refractive indices (b) for a 5CB droplet between aligned bare mica sheets (T=27°C). (a) Force runs approaching the surfaces (filled circles and triangles) a residual repulsion is observed in retraction (open circles) a jump-out from the minimum of a layering oscillations is shown. The continuous lines represent the elastic twist force F D)/R = ttK220 /D (see [50] for details), calculated assuming an infinite anchoring strength with K22 = 6.5 x N. The twist...

The paint formulator must devise suitable tests, which will inform him of variation in viscosity characteristics and must know how to adjust the paint to give the required characteristics. Tests can include measurements of viscosity at several rates of shear (see p. 119). Points plotted on a viscosity-rate of shear graph must fall within a given area. Alternatively, if the paint fornis a gel in the can, the strength of the gel in the container can be measured by inserting a razor blade-shaped paddle on a spindle. The paddle is then slowly rotated by a motor. At first the paint and container turn with it, but eventually the gel breaks and, at this point, the twisting force or torque is noted and recorded as the gel strength. 

Insert the glass into the hole, using moderate inward pressure and a slight twisting motion. Neither the forward pressure nor the twisting force should be excessive to avoid breaking the glass. 

Torque A turning or twisting force that tends to produce rotation. 

Torque It is a force, energy, or moment, that produces or tends to produce rotation or torsion. The twisting force consists of the load applied multiplied by the distance perpendicular to the center of rotational vertical axis. Torque is very useful to designers where some type of torque action occurs in a product deign such as center roller supports, etc. 

Effect of the composition of cholesteric copolymers on the selective reflection of light. The concept of the twisting force of the chiral additive, or helix-induction force (A), expressed by the following ratio, is usually used in studying the optical properties of the induced cholesteric mesophase in low-molecular-weight nematic-cholesteric mixtures ... 

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