Hiroshima Noboru

TL;DR: In this paper, a fiber reinforced plastic made of a three-dimensional structure fabric is used for the insulating layer of a printed wiring board to reduce the generation of various defects due to the thermal expansion of the board in the thickness direction, such as disconnection of a throughhole plating and the like under a high-temperature environment.

TL;DR: In this article, two disk thicknesses were examined: uniform thickness and varied thickness, becoming thinner with distance from the disk center, and the maximum burst tip tip speed was calculated as 1376m/s for the uniform thickness no-bundles-added model and 1797 m/s with varied thickness No-Bundles added model.

TL;DR: In this paper, three connection methods between a driving shaft and an annular rotation disk made of three-dimensionalally carbon-fiber reinforced composite were discussed to achieve stable rotation at high rotation speeds by changing the hub material and joining geometry: the connecting device.

TL;DR: In this article, Reinforcement fibers are arranged in the radial direction to suppress the crack of a bunch of fibers and achieve a smaller inner/outer diameter ratio of a disc, which allows the disc to be joined directly to a rotating shaft with no existence of a hub there between.

TL;DR: In this paper, a method for connecting a driving shaft to a three-dimensional composite disk via a polymer ring was examined to achieve stable rotation at high rotation speeds, where polyoxymethylene (POM) was adopted as the polymer ring material.