Abstract Machining of fiber-reinforced composites produces delamination in the workpiece. In bidirectional long fiber fabric reinforced composites, depends on different parameters. this work, two parameters are studied: orientation angle respect to machining direction and distance warp yarn from trimmed edge until next dip below crossing fill. This work defines angles relating with cutting feed...

in the shafaroud forest, logging operation is generally performed by using selective cutting methods. chainsaw and cable skidder are two main forest machines for harvesting of this forest. however, forest harvesting operations result in serious residual stand damage during felling, winching and skidding operations in this forest. residual stand damage resulting from selective cutting was assess...

With the recent increase in size and image quality of optical equipment, there is a strong demand for higher precision aspherical lenses. Generally, an glass lens or its mold formed by grinding then finished polishing. Since shape accuracy deteriorates this polishing process, it necessary to keep amount small. Therefore, desirable optimize conditions reduce surface roughness. In paper, axisymme...

Estimation and modeling of soft tissue deformation during cutting is important for developing a reality based haptic interaction model for surgical training and simulation. In this paper, we are interested in understanding the effect of parameter changes, such as the cutting speed and the angle of cutting, to develop a predictive model that is self consistent with the experimental observations....

PURPOSE This study aimed to identify the lower limb muscle activity based on direction prediction presence or absence and gender during side cutting in healthy college students. METHODS The participants included 14 males females (8 males; 6 females). All ran at full speed for a distance of 12m, side-cutting was carried out 45 degrees randomly indicated fixed direction. Simultaneously, data rega...

This article reports the effects of various artificial aging methods and lubrication modes (dry, mist, wet) on the recorded cutting forces and chip morphology in drilling Al-Si-Mg (A356) cast alloys. In the course of this work, the work part sampled were as-received alloy (T0), solution heat-treated alloy (SHT) and then aged alloys at 155°C, 180°C, and 220°C (T4, T6, T61, T7), respectively. The...

Utilization of metalworking fluids in the technological process of metalworking brings its advantages and disadvantages, mainly associated with the contamination of the working air through cutting fluid mist. The primary aim of this article is to approximate the mechanism of aerosols generation which contaminates the working air and to draw the attention to the problem of quantification of gene...

Two types of alumina-based cutting tools with compositions of 90 vol.% Al2O3+10 vol.% ZrO2 and 80 vol.% A12O3+20 vol.% TiC are produced by isostatic pressing and sintering technique. The effects of these additives on the mechanical properties and cutting performance of these materials are investigated. The tool life in both materials is examined under identical conditions on cutting a grey cast...

In the traditional micromilling (TMM) of Inconel718 alloy, due to influence material plasticity and size effect, relatively large burr will be produced. order hinder forming in micromilling, ultrasonic vibration feed direction is applied workpiece complete cutting. Combined with trajectory simulation cutting experiment, formation mechanism TMM assisted (UVAMM) was studied. The results show that...

Purpose. Highlight the main results of experiments performed on destruction martite ores by method borehole hydraulic their layering. Since, as a result analysis literary sources, it was established that some deposits Kryvyi Rihiron ore basin are suitable for hydro monitor excavation.Consideration introducing technologies hydromechanization mining operations in conditions is topical issue. The ...