The objectives of this study were to determine the effects of dentition on feed-oriented behavior and feed consumption before weaning at 28 d, and whether premolar eruption or occlusion at the time of weaning influenced postweaning growth or behavior. Over 3 trials, 24 litters of Yorkshire piglets (n = 233) were provided with creep feed marked with 1% chromic oxide on d 5. Dental exams were per...

Time-dependent creep stress redistribution analysis of thick-walled FGM spheres subjected to an internal pressure and a uniform temperature field is investigated. The material creep and mechanical properties through the radial graded direction are assumed to obey the simple power-law variation throughout the thickness. Total strains are assumed to be the sum of elastic, thermal and creep strain...

During uneven and time-dependent compliant grinding of brittle materials, the surface topography is difficult to predict as ductile regions are coupled due compliance occurring in macro/micro tool-workpiece contact. This paper proposed a predictive model for prediction by considering its ductile-brittle transition grinding. Shape adaptive monocrystalline silicon were chosen an example validate ...

In this study, the effects of machining parameters on specific energy during surface grinding of 6061Al-SiC35P composites are investigated. Vol% of SiC, feed and depth of cut were chosen as process variables. The power needed for the calculation of the specific energy is measured from the two watt meter method. Experiments are conducted using standard RSM design called Central composite design ...

The relationship between the grinding characteristics of polymetallic complex ore and its component minerals, pyrrhotite, sphalerite, quartz, under action abrasion was studied, based on batch experiments theoretical analysis methods selective grinding. results show that when subjected to abrasion, crushing effect enhanced by existence is, sphalerite plays a positive role in ore. reduced pyrrhot...

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...

This work presents a system of measuring grinding forces in precision applications. Several experiments demonstrate the performance in monitoring diamond wheel dressing, detecting workpiece contact, and process monitoring. The system appears promising for monitoring precision wafer grinding since this approach provides excellent sensitivity, high signal resolution, and good bandwidth. INTRODUCT...

This paper investigates the grinding performance of epoxy matrix composites reinforced by unidirectional carbon fibres, using an alumina grinding wheel. Emphasis was placed on understanding the effect of fibre orientations and grinding depths on the grinding force and surface integrity, and on understanding the grinding mechanisms, with a comparison to orthogonal cutting. It was found that grea...

Off-round grinding performed on CNC cylindrical grinding is a relatively new process. This paper takes a systems approach and discusses the various inputs and outputs and highlights the potential problems that production engineers face in implementing this new process. The effect of the inputs to the off-round grinding process such as the grinding machine, wheel, grinding fluid and the workpiec...