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In-plane Stress Analysis of Relating Composite Disks  

Koo Kyo-Nam (울산대학교 항공우주공학과)
Publication Information
Composites Research / v.18, no.4, 2005 , pp. 8-13 More about this Journal
Abstract
Rotating circular disks are widely used in data storage devices as well as in traditional industrial machines. Faster rotating speed is required in data storage devices for higher data transfer rate. In this Paper an application of composite materials to CD is proposed to increase critical speeds and the strength analysis was performed. A differential equation of displacement is derived for the analytic stress distribution of rotating polar orthotropic disk. The stress distributions for typical GFRP and CFRP disks and the maximum allowable speeds subjected to a constraint of tensile strength are presented in addition to polycarbonate disk. The results show that the application of CFRP to rotating disk can increase the maximum allowable rotating speed but this may not be applicable to GFRP disk.
Keywords
rotating disk; in-plane stress; polar orthotropic; CD;
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