The Effects of Surface Roughness and Out-of-Roundness on Fracture of Shrink Fit between Ceramic and Metal

• Published in: Transactions of the Japan Society of Mechanical Engineers Series C Vol. 54; no. 503; pp. 1564 - 1571
• Main Authors: NITTA, Isami, SHIMODA, Shigeru, ISHIBASHI, Tatsuya, KATO, Koji
• Format: Journal Article
• Language: English; Japanese
• Published: The Japan Society of Mechanical Engineers 1988
• Subjects: Ceramic; Contact Pressure; Fixing Element; Machine Element; Out-of-Roundness; Shrink Fit; Surface Roughness
• ISSN: 0387-5024; 1884-8354
• DOI: 10.1299/kikaic.54.1564

In the previous paper, we theoretically analyzed the distributions of the contact pressures between ceramic and metal whose cylindricities were not perfect. In this paper, the distributions of the contact pressures in the circumferential direction were theoretically analyzed when the roundnesses were not perfect. The distributions of the contact pressures were changed as the degree of out-of-roundness was changed. Shear stress did not exist on the surface to be jointed. The mean contact pressures decreased with increased surface roughness. And the concentrations of the contact pressures caused by the out-of roundness were relaxed by the roughened surfaces to be joined. The effects of both out-of roundness and surface roughness on the fractures of ceramic rings were also discussed. And it was shown that the roughened surfaces to be joined prevented the ceramic rings from fracturing.