Railway crossings are subjected to a severe load environment leading degradation of rail profiles due wear and accumulated plastic deformation. This damage is the result high magnitudes contact pressure traction generated in wheel–rail during each wheel transition between wing crossing nose. An extensive measurement campaign has been carried out at test site Austria particularly severely loaded...

The quality of channel sidewalls resulting from through-wafer deep reactive-ion etching is analysed using scanning electron microscopy, atomic-force microscopy and interferometry. Sidewall quality and profile are highly dependent on the width of the etched channel. Channels narrower than 100 lm show generally good sidewall smoothness, though with a bowed profile. This profile leads to ion-induc...

Noteworthy results have been obtained in the turning and drilling of hardened high-strength steels using tungsten carbide based cutting tools. In a finish turning process, it was seen that surface roughness and tool flank wear followed very different trends against cutting time. The suggested explanation for this behaviour is that the profile cut into the workpiece surface is determined by the ...

This paper will present a mission profile reduction technique to reduce the simulation time needed simulate yearly behaviour of PV system. Due strong climate dependency weather and thereby profile, simplification method is likewise strongly dependant. The be applied different profiles from arid places around world (Arizona, Colorado, Spain, Sacramento), where speed-up tested along with error in...

Electrochemical milling using a delta-type parallel mechanism is proposed to achieve high-speed translation of the tool electrode, which known improve surface finish. Experimental results machining groove show that roughness decreases with increasing speed electrode. Moreover, it found electrode effective at preventing electrical discharge damage both and workpiece. Large areas can be machined ...

in this paper, the capabilities of displacement curvature derived from static response data for finding the location and severity of damage in euler-bernoulli beams are assessed. static response of a beam is obtained using the finite element modeling. in order to reduce the number of measured nodal displacements, the beam deflection is fitted through a polynomial function using a limited number...

This paper studies gratings engraved in multilayer dielectric stacks for ultra high intensity laser compressors application. We design various grating profiles with high reflected efficiencies for 1780 l/mm multilayer dielectric gratings (MLD). Each grating is defined to exhibit a different electric field maximum value in the pillars of the grating. A damage testing facility operating at 1.053 ...