Honda Giken Kogyo Kabushiki Kaisha

Ntn Corporation

Hitoshi Ishii

Kazuo Ishii

Yukio Matsubara

Yoshihiro Odagiri

Noriaki Sakanaka

Yoshihiro c/o Kabushiki Kaisha Honda Gijutsu Kenkyusho Odagiri

Kazuo c/o Kabushiki Kaisha Honda Gijutsu Kenkyusho Ishi

A method of assessing the shear fatigue property of a metallic material that undergoes a rolling contact includes a testing step for determining the relation between the shear stress amplitude of a rolling contact metallic material and the number of loading by means of an ultrasonic torsional fatigue test, and a shear fatigue strength determining step for determining the shear fatigue strength &#x3c4;lim within the ultra long life regime from the relation between the shear stress amplitude and the number of loadings, which relation has been determined during the test step, in accordance with a predetermined standard. It is a completely reversed torsional fatigue test, in which torsional vibrations, respective torsions in the positive rotational direction and reversed rotational direction of which are symmetrical relative to each other, are applied to a test piece.

Assessment of shear fatigue property of rolling contact metal material and estimation of fatigue limit maximum contact pressure using same assessment

A fatigue test device for thin plates can reliably perform tests. The fatigue test device has a rod having ends in a longitudinal direction thereof; a vibration source for excitating a longitudinal end of the rod in the longitudinal direction thereof so as to form a standing wave having node portions and antinode portions formed therebetween and a mounting means for mounting a test piece having a longitudinal direction at one of the antinode portions, the test piece being positioned such that the longitudinal direction thereof is perpendicular to the longitudinal direction of the rod.

Fatigue test device and method for testing the thin plate

Growing community of inventors

Hamamatsu, Japan

Hitoshi Ishii