Page 4 - Surface Roughness News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Abstract Micro-hydromechanical deep drawing (MHDD) is a promising micro-manufacturing technology to fabricate micro-metallic products in batch scale. Size effects significantly affect MHDD regarding both material properties and friction. Hydraulic pressure on the blank and its development differ from that in conventional hydromechanical deep drawing. Combined influence of fluid pressure, surface roughness and material inhomogeneity of the blank was investigated in this study via MHDD experiments and advanced FE simulation considering strong fluid-solid interaction (FSI) and size effects. The ...

Different than what you're normally used to on a soccer ball. it's said to have remarkable technological improvements. but world cup players are complaining saying it plays differently than a normal soccer ball and not a good way. they annual had about a month of practice with this ball. a regular soccer ball has 32 stitched panels. the jabulani has eight panels. it's got grooves like a soccer ball, like dimples. in theory, makes the ball go farther. aeronautical engineers did a wind tunnel test to see differences in the ball's air flow pattern. critics have called the ball tricky and unpredic...