A two-dimensional (2-D) finite element model (FEM) has been developed to perform numerical simulations of vibration assisted machining (VAM). The model is based on an updated Lagrangian formulation, with adaptive remeshing. The model is capable of simulating the amplitude and frequency independently of the tool in the cutting (x) and thrust (y) force directions over a wide range of values. The ...

In the present study, vibration of cylindrical laminates with different layers and angles were studied. In order to actuate and polarize in radial direction, a piezoelectric layer was located at outer surface of composite shell. Laminates were assumed long enough so that plane strain state analysis in 2D can be used properly. In order to satisfy the boundary conditions, variables in terms of Fo...

Dictyostelium discoideum slugs migrating in the absence of external stimuli tend to continue migrating in the original randomly 'chosen' direction. Spontaneous deviations from the starting direction accumulate with time at a rate that measures the 'physiological noise' in the slugs' steering mechanism. Most of the spontaneous turning signals arise in the transduction chain 'downstream' of the c...

Ultrasonic-assisted grinding (UAG) is widely used in the manufacture of hard and brittle materials. However, process removal mechanism was never elucidated its potential yet to be fully exploited. In this paper, material analyzed by ultrasonic-assisted scratching. Three distinct surfaces (S1, S2, S3) were selected on basis braided laminated structure fiber bundles. The scratching experiment car...

Experimental analysis of conventional turning (CT) and ultrasonically assisted (UAT) two varieties particulate SiC infused aluminium metal matrix composite (217XG, 225XE) is carried out. The results indicate the amount tangential cutting force reduction in UAT compared to CT increased at lower speed higher depth-of-cut. using carbide tools reduced average forces by 60.5%, 29.5% for 217XG 225XE,...

The paper investigates the effective detection and esdmation of = m v e wear at the minor cutting edge, which has a mtal influence on surface quality in finish-machining. During bar-turning experiments with different cutting conditions, a miniature 3-D accelerometer, mounted in close vicinity to the tool tip, was used to measure the multivariate vibration signal produced by the turning process....