To study the effect of different parameters on milling force for longitudinal-torsional ultrasonic vibration (LTUM) titanium alloy, kinematic theory LTUM is combined with model transient cutting thickness to establish equation, and experiment was carried out. The experimental results showed that positively correlated speed, depth, feed per tooth (milling increased by about 40% in increasing spe...

Constant velocity Off-Vertical Axis Rotation (OVAR) imposes a continuously varying orientation of the head and body relative to gravity, which generates a modulation of horizontal (conjugate and vergence), vertical, and torsional eye movements. We introduced the head-turn-on-trunk paradigm during OVAR to examine the extent to whether the modulation of these ocular reflexes is mediated by gravic...

A 54-story steel, perimeter-frame building in downtown Los Angeles, California, is identified by a wave method using records of the Northridge earthquake of 1994 (ML=6.4, R=32 km). The building is represented as a layered shear beam and a torsional shaft, characterized by the corresponding velocities of vertically propagating waves through the structure. The previously introduced waveform inver...

Complex rotating machine trains especially trains including electric machines are subject to the most varied and often most severe torsional disturbances. If shaft or rotating component failures occur as a result of torsional oscillations, the consequences can be catastrophic. In this paper a comprehensive model and simulation method using analytical formulations are developed to study both ste...

Trains including reciprocating machines are subject to the most varied and often most severe torsional disturbances in comparison to other machinery classes. If crankshaft or rotating component failures occur as a result of shaft torsional oscillations, the consequences can be catastrophic. In this paper a new comprehensive model and solution method using analytical formulations are developed t...

No conventional technique for routine assessment of tibial torsion, the twisting of tibia around the longitudinal axis, has yet gained acceptance. Clinical measurements give approximate values only. Methods employing tropometers and other mechanical devices have mainly been used for measurement in skeletal specimens and in patients, though on a limited scale. Certain roentgenographic methods ar...

In this paper, we propose the first numerical study of nanotube-based torsional oscillators via developing a new multiscale model. The edge-to-edge technique was employed in this multiscale method to couple the molecular model, i.e., nanotubes, and the continuum model, i.e., the metal paddle. Without losing accuracy, the metal paddle was treated as the rigid body in the continuum model. Torsion...

Thresholds for discriminating the orientation of unreferenced horizontal and vertical lines were measured in subjects with congenital nystagmus (CN) and normal observers and compared to the variability of torsional eye position. Orientation thresholds were determined for horizontal and vertical lines between 0.7 degrees and 5.6 degrees in length, that were presented binocularly for 20-1280 ms. ...

In this paper, the in-plane torsional properties of two dimensional nanomaterials are revealed to be tunable by surface functionalization using molecular dynamics simulations. The torsional strengths of both graphene and graphyne under circular shearing are found to first decrease and then increase anomalously with the increase of the hydrogenation ratio. The minimum strength of such U-shaped s...

Because many osteoporotic fractures occur during a fall, understanding the effect of off-axis loads on initiation and propagation of microdamage in trabecular bone should provide further insight into the biomechanics of age-related fractures. Fourteen on-axis cylindrical specimens were prepared from 12 bovine tibiae. Fluorescent stains were used to label the microdamage due to a sequence of com...