In an era with robotic partial nephrectomy dominating as the predominate modality to tackle small renal masses, Choiand Bae (1) demonstrate that advanced laparoscopic skill in urology is still alive and well. The difficulty in management with multiple renal tumors is not only nephron preservation, but how to limit the amount of warm ischemia when having to preform multiple resections and renorr...

In the present study, we designed a ring rolling preform for producing a ringed product with a grooved outer circumferential surface. One of the most common defects in the profile of a ring rolling process is unfilling, which occurs when the deformation amount of product is small or the depth of the groove in the outer surface is large. To prevent unfilling, the deformation amount should be inc...

Silicon carbide nanofibers grew on the surface of carbon fibers of a unidirectional carbon preform by CCVD and then chemical vapor infiltration was used to densify the preform to get the SiCNF-C/C composite. The effects of silicon carbide nanofibers on the microstructure of the pyrolytic carbon and the thermal conductivity of the SiCNF-C/C composite were investigated. Results show that silicon ...

An advanced feedback control strategy for a vapor-phase axial deposition (VAD) is investigated in this paper. VAD is a widely used process in the creation of high purity glass for optical fiber. In previous work a soot tip surface temperature controller was developed for the VAD process to reduce the effects of core soot temperature variation on deposition geometry, leading to a more stable pro...

Ceramic matrix composites (CMCs) have been designed and developed for extreme operating environments. The aim of the present study is to look a rapid densification process providing high level material performance. fibrous preform was made Hi-Nicalon S fibers woven in 3D interlock weave. composed Si2N2O prepared inside CMCs by reacting mixture Si SiO2 under nitrogen pressure (1 3 MPa). Silica e...

Introduction In the era of process modeling of composite materials, 3D simulation of manufacturing processes is desirable considering the manufacturing trend where parts became more complex leading to complex 3D stress-strain states. Moreover, coupling of sub-processes that are happening simultaneously such as macro-scale preform processes, flow advancement and solid and fluid interaction requi...